UPSC IES ISS Study Material PDF 2021  Syllabus  Paper  Books – Candidates who are preparing for IES/ISS Exam must be looking for Indian Statistical Services Preparation ISS Study Material to prepare well for the examination. They need not to worry as here we are with the List of Best IES / ISS Preparation ISS Study Material. Union Public Service Commission conducts the Indian Statistical Services and Indian Economics Services exam to recruit candidates for the post of officers in both departments.
UPSC IES ISS Study Material PDF 2021  Syllabus  Paper  Books
Name of Exam  Indian Economic Service (IES)/Indian Statistical Service (ISS) 
Organization Name  Union Public Service Commission(UPSC) 
Periodicity  Annually 
Exam Level  National 
Mode of Application  Online 
Application Fees  INR 200/ 
Mode of Exam  Offline 
Negative Marking  0.33 marks 
Selection Process  Written examination & Interview test 
Official Website  upsc.gov.in. 
UPSC IES/ISS Eligibility Criteria
Nationality
Candidates applying for UPSC IES 2021 must check the Nationality before filling the application form. For more details, candidates can check the information given below.
 Citizen of India
 Subject of Bhutan
 Subject of Nepal
 Tibetan refugee who came to India before January, 1962, with the intention to permanently settle in India
 Person of Indian origin who has migrated from Pakistan, Burma, Sri Lanka & East African Countries with the intention to permanently settle in India.
Educational Qualification
1. For Indian Economic Service (IES): The candidates must have obtained a Post Graduate Degree in Economics/Applied Economics/Business Economics/Econometrics from a recognized university or a foreign university approved by the Central Government of India from time to time.
2. For Indian Statistical Service (ISS): The candidates must have obtained a Bachelor’s Degree with Statistics/Mathematical Statistics/Applied Statistics as one of the subject or else the candidates should hold a Master’s degree in Statistics/Mathematical Statistics/Applied Statistics from a recognized university or a foreign university approved by the Central Government of India from time to time.
Age Limit
The candidates must have attained the age of 21 years and must not have attained the age of 30 years as on August 1, 2020, i.e. he/she must have been born not earlier than August 2, 1990, and not later than August 1, 1999.
The upper age limit prescribed above will be relaxable as mentioned for the below categories:
 Scheduled Caste or a Scheduled Tribe – 5 Years
 Other Backward Classes – 3 Years
 If a candidate has ordinarily been domiciled in the State of Jammu & Kashmir during the period from January 1, 1980, to December 31, 1989, – 5 Years Up to a maximum of three years in the case of Defence Services Personnel disabled in operations during hostilities with any foreign country or in a disturbed area, and released as a consequence thereof
 Up to a maximum of five years in the case of exservicemen including Commissioned Officers and ECOs/SSCOs who have rendered at least five years Military Service as on August 1, 2020
 Up to a maximum of 10 years in the case of (a) blindness & low vision, (b) deaf & hard of hearing, (c) locomotor disability including cerebral palsy, leprosy cured, dwarfism, acid attack victims and muscular dystrophy, (d) autism, intellectual disability, specific learning disability and mental illness, (e) multiple disabilities from amongst person under clauses (a) to (d) including deafblindness
Application fee
 The candidates will have to pay Rs. 200/ as application fee except female/ SC/ ST candidates who are exempted from fee payment.
 Application fee payment can be done using cash through payin slip submitted at any branch of SBI.
 Online fee payment can be done using net banking facility of SBI or debit card/ credit card of any bank.
Application Form
 The candidates will have to provide their personal details such as name, age, gender, category, etc and qualifying exam details such as passing year, marks obtained, etc into the application form.
 Applicants will also have to upload their photograph and signature into the application form in scanned format.
 The details in the application form must be entered very carefully as any kind of error in the application form can lead to its rejection.
 After all the details are entered correctly into the application form, the candidates can submit it along with the prescribed fee.
 Application form submitted without the application fee will not be considered as successful.
Physical Standards:
 Candidates must be physically fit according to physical standard for admission to Indian Economic Service/ Indian Statistical Service Examination.
Selection Process
Selection Procedure followed by UPSC is explained below in form of various stages of Recruitment Procedure
 Written Examination
 Interview/ Personality Test
Written Exam:
Written exam will be conducted for 1000 marks.
 The time duration for StatisticsI, II in Indian Statistical Service will be 2 hours.
 The time duration for remaining subjects will be 3 hours.
 General English and General Studies carries 100 marks each and remaining subjects carries 200 marks for each subject.
 There will be negative marking for the wrong answers. The candidates who qualify in the written examination will be called for interview.
Interview:
 The candidate will be interviewed by a Board of competent and unbiased observers who will have before them a record of his/her career.
 The object of the interview is to assess his/her suitability for the Service for which he/she has competed.
 The interview is intended to supplement the written examination for testing the general and specialized knowledge and abilities of the candidate.
 The technique of the interview is not that of a strict cross examination, but of a natural, through directed and purposive conversation, intended to reveal mental qualities of the candidate and his/her grasp of problems.
 The Board will pay special attention to assessing the intellectual curiosity, critical powers of assimilation, balance of judgement and alertness of mind, the ability for social cohesion, integrity of character, initiation and capacity of leadership.
Roles and Responsibilities  UPSC IES ISS Study Material PDF
 IES is the gateway to the central service as Group A officers.
 Aspirants who successfully pass IES/ISS examination are placed in various cadre posts in the planning commission, planning board, ministry of economic affairs, national sample survey and other allied offices where specialists in economics and statistics are required.
 The posts are primarily located in Ministries/ Departments dealing with economic and social sectors. Besides Cadre posts, IES officers go on deputation to serve in various domestic and international organizations such as UN bodies, foreign governments, state governments and regulatory bodies.
 Officers from the service are also appointed on deputation to posts in the Central Ministries/ Departments under the Central Staffing Scheme.
 The places of posting are usually in the State capitals or New Delhi
 A candidate selected at a favorable age can expect to rise quite high in the career and touch the level of even Secretary to the Government of India, in any Ministry concerned with economic affairs.
UPSC IES/ ISS Exam Pattern
B. Indian Statistical Service  UPSC IES ISS Study Material PDF
 Mode of exam: Offline
 Medium of exam: English
 Type of questions: Subjective type (Short Answer/ Small Problems (50%) and Long Answer and Comprehension (50%)) except Statistics I and Statistics II for which questions will be of objective type
 Total marks: 1000
 Negative marking: Onethird marks of the allotted marks will be deducted for each incorrect answer for objective type questions
Subject  Marks allotted  Duration 
General English  100  3 hrs. 
General Studies  100  3 hrs. 
Statistics I  200  2 hrs. 
Statistics II  200  2 hrs. 
Statistics III  200  3 hrs. 
Statistics IV  200  3 hrs. 
 StatisticsI & II will be of Objective Type Questions (80 questions with maximum marks of 200 in each paper) to be attempted in 120 minutes.
 StatisticsIII & IV will be of Descriptive Type having Short Answer/ Small Problems Questions (50%) and Long Answer and Comprehension problem questions (50%). Atleast one Short Answer and One Long Answer Question from each section is compulsory. In StatisticsIV,equal number of questions i.e. 50% weightage from all the sub sections below and candidates have to choose any two subsections and answer.
 The papers on General English and General Studies, common to both Indian Economic Service and Indian Statistical Service will be of subjective type.
 All other papers of Indian Economic Service will be of subjective type.
 The question papers in all the subjects will be of Conventional (essay) type.
 All question papers must be answered in English. Question paper will be set in English only.
PARTII – Viva voce  UPSC IES ISS Study Material PDF
 The candidate will be interviewed by a Board of competent and unbiased observers who will have before them a record of his career.
 The object of the interview is to assess his suitability for the Service for which he has competed.
 The interview is intended to supplement the written examination for testing the general and specialized knowledge and abilities of the candidate.
 The candidate will be expected to have taken an intelligent interest not only in his subjects of academic study but also in events which are happening around him both within and outside his own State or country, as well as in modern currents of thought and in new discoveries which should rouse the curiosity of welleducated youth.
 The technique of the interview is not that of a strict cross examination, but of a natural, through directed and purposive conversation, intended to reveal mental qualities of the candidate and his/her grasp of problems.
 The Board will pay special attention to assessing the intellectual curiosity, critical powers of assimilation, balance of judgement and alertness of mind, the ability for social cohesion, integrity of character, initiation and capacity of leadership.
UPSC IES/ISS Exam Syllabus  UPSC IES ISS Study Material PDF
Union Public Service Commission conducts Indian Economic Service (IES) and Indian Statistical Service (ISS) Exam every year. The Syllabus followed by UPSC IES/ISS Exam has been detailed below
Standard and Syllabi
 The standard of papers in General English and General Studies will be such as may be expected of a graduate of an Indian University.
The standard of papers in the other subjects will be that of the Master’s degree examination of an Indian University in the relevant disciplines. The candidates will be expected to illustrate theory by facts, and to analyse problems with the help of theory.  They will be expected to be particularly conversant with Indian problems in the field of Economic/Statistics.
General English:
Candidates will be required to write an essay in English. Other questions will be designed to test their understanding of English and workmanlike use of words. Passages will usually be set for summary or precis.
General Studies
General Knowledge including knowledge of current events and of such matters of every day observation and experience in their scientific aspects as may be expected of an educated person who has not made a special study of any scientific subject. The paper will also include questions on Indian Polity including the political system and the Constitution of India, History of India and Geography of a nature which the candidate should be able to answer without special study.
Part A: General EconomicsI
1. Theory of Consumer’s Demand: Cardinal utility Analysis; Marginal utility and demand, Consumer’s surplus, Indifference curve Analysis and utility function, Price income and substitution effects, Slutsky theorem and derivation of demand curve, Revealed preference theory. Duality and indirect utility function and expenditure function, Choice under risk and uncertainty.
2. Theory of Production: Factors of production and production function. Forms of Production Functions: CobbDouglas, CES and Fixed coefficient type, Translog production function. Laws of return, Returns to scale and Return to factors of production. Duality and cost function, Measures of productive efficiency of firms, technical and allocative efficiency. Partial Equilibrium versus General Equilibrium approach. Equilibrium of the firm and industry.
3. Theory of Value: Pricing under different market structures, public sector pricing, marginal cost pricing, peak load pricing, crosssubsidy free pricing and average cost pricing. Marshallian and Walrasian stability analysis. Pricing with incomplete information and moral hazard problems.
4. Theory of Distribution: Neo classical distribution theories; Marginal productivity theory of determination of factor prices, Factor shares and adding up problems. Euler’s theorem, Pricing of factors under imperfect competition, monopoly and bilateral monopoly. Macrodistribution theories of Ricardo, Marx, Kaldor, Kalecki.
5. Welfare Economics: Interpersonal comparison and aggregation problem, Public goods and externality, Divergence between social and private welfare, compensation principle. Pareto optimality. Social choice and other recent schools, including Coase and Sen and Game theory.
Part B: Quantitative Methods in Economics:
1. Mathematical Methods in Economics: Differentiation and Integration and their application in economics. Optimisation techniques, Sets, Matrices and their application in economics. Linear algebra and Linear programming in economics and Inputoutput model of Leontief.
2. Statistical and Econometric Methods: Measures of central tendency and dispersions, Correlation and Regression, Time series, Index numbers, Sampling and Survey methods, Testing of hypothesis, simple nonparametric tests. Drawing of curves based on various linear and nonlinear function. Least square methods and other multivariate analysis (only concepts and interpretation of results). Analysis of Variance, Factor analysis, Principle component analysis, Discriminant analysis. Income distribution: Pareto law of Distribution, lognormal distribution, measurement of income inequality. Lorenze curve and Gini coefficient.
General EconomicsII
1. Economic Thought: Mercantilism Physiocrats, Clasical, Marxist, Neoclassical, Keynesian and Monetarist schools of thought.
2. Concept of National Income and Social Accounting: Measurement of National Income, Inter relationship between three measures of national income in the presence of the Government sector and International transactions. Environmental considerations, Green national income.
3. Theory of employment, Output, Inflation, Money and Finance: The Classical theory of Employment and Output and Neo classical approaches. Equilibrium, analysis under classical and neo classical analysis. Keynesian theory of Employment and output. Post Keynesian developments. The inflationary gap; Demand pull versus cost push inflation, the Philip’s curve and its policy implication. Classical theory on Money, Quantity theory of Money. Friedman’s restatement of the quantity theory, the neutrality of money. The supply and demand for loanable funds and equilibrium in financial markets, Keynes’ theory on demand for money.
4. Financial and Capital Market: Finance and economic development, financial markets, stock market, gift market, banking and insurance. Equity markets, Role of Primary and Secondary markets and efficiency, Derivatives markets; Futures and options.
5. Economic Growth and Development: Concepts of Economic Growth and Development and their measurement: characteristics of less developed countries and obstacles to their development – growth, poverty and income distribution. Theories of growth: Classical Approach: Adam Smith, Marx and Schumpeter – Neo classical approach; Robinson, Solow, Kaldor and harrod Domar. Theories of Economic Development, rostow, RosensteinRoden, Nurske, Hirschman, Leibenstien and Arthur Lewis, Amin and Frank (Dependency school) respective role of the state and the market. Utilitarian and Welfariest approach to social development and A K Sen’s critique. Sen’s capability approach to economic development. The Human Development Index. Physical quality of Life Index and Human Povery Index.
6. International Economics: Gains from International Trade, Terms of Trade, policy, international trade and economic development – Theories of International Trade; Ricardo, Haberler, HeckscherOhlin and StoplerSamuelson – Theory of Tariffs – Regional Trade Arrangements.
7. Balance of Payments: Disequilibrium in Balance of Payments, Mechanism of Adjustments, Foreign Trade Multiplier, Exchange Rates, Import and Exchange Controls and Multiple Exchange Rates.
8. Global Institutions: UN agencies dealing with economic aspects, World Bank, IMF and WTO, Multinational Corporations.
General EconomicsIII
1. Public Finance: Theories of taxation: Optimal taxes and tax reforms, incidence of taxation; Theories of public expenditure: objectives and effects of public expenditure, public expenditure policy and social cost benefit analysis, criteria of public investment decisions social rate of discount, shadow prices of investment, unskilled labour and foreign exchange. Budgetary deficits. Theory of public debt management.
2. Environmental Economics: Environmentally sustainable development, Green GDP, UN Methodology of Integrated Environmental and Economic Accounting. Environmental Values: Users and nonusers values; option value. Valuation Methods: Stated and revealed preference methods. Design of Environmental Policy Instruments: Pollution taxes and pollution permits, collective action and informal regulation by local communities. Theories of exhaustible and renewable resources. International environmental agreements. Climatic change problems. Kyoto protocol, tradable permits and carbon taxes.
3. Industrial Economics: Market structure, conduct and performance of firms, product differentiation and market concentration, monopolistic price theory and oligopolistic interdependence and pricing, entry preventing pricing, micro level investment decisions and the behavior of firms, research and development and innovation, market structure and profitability, public policy and development of firms.
4. State, Market and Planning: Planning in a developing economy, Planning regulation and market, Indicative Planning, Decentralised Planning.
Indian Economics
1. History of Development and Planning: Alternative Development Strategies – goal of self reliance based on import substitution and protection, the post 1991 globalization strategies based on stabilization and structural adjustment packages: fiscal reforms, financial sector reforms and trade reforms.
2. Federal Finance: Constitutional provisions relating to fiscal and financial powers of the states, Finance Commissions and their formulae for sharing taxes, Financial aspect of Sarkaria Commission Report, Financial aspects of 73rd and 74th Constitutional Amendments.
3. Poverty, Unemployment and Human Development: Estimates of inequality and poverty measures for India, appraisal of Government measures, India’s human development record in global perspective. India’s population policy and development.
4. Agriculture and Rural Development Strategies: Technologies and institutions, land relations and land reforms, rural credit, modern farm inputs and marketing – price policy and subsidies; commercialization and diversification. Rural development programmes including poverty alleviation programmes, development of economic and social infrastructure and New Rural Employment Guarantee Scheme.
5. India’s experience with Urbanisation and Migration: Different types of migratory flows and their impact on the economies of their origin and destination, the process of growth of urban settlements; urban development strategies.
6. Industry: Strategy of Industrial development: Industrial Policy Reforms; Reservation Policy relating to small scale industries. Competition policy, Sources of industrial finances. Bank, share market, insurance companies, pension funds, nonbanking sources and foreign direct investment, role of foreign capital for direct investment and portfolio investment, Public Sector reform, privatization and disinvestments.
7. Labour: Employment, unemployment and underemployment, industrial relations and labour welfare – strategies for employment generation – Urban labour market and informal sector employment, Report of National Commission on Labour, Social issues relating to labour eg. Child Labour, Bonded Labour, International Labour Standard and its impact.
8. Foreign Trade: Salient features of India’s foreign trade, composition, direction and organization of trade, recent changes in trade policy, balance of payments, tariff policy, exchange rate, India and WTO requirements.
9. Money and Banking: Financial sector reforms, Organisation of India’s money market, changing roles of the Reserve Bank of India, commercial banks, development finance institutions, foreign banks and nonbanking financial institutions, Indian capital market and SEBI, Development in Global Financial Market and its relationship with Indian Financial Sector.
10. Inflation: Definition, trends, estimates, consequences and remedies (control): Wholesale Price Index, Consumer Price Index: components and trends.
11. Budgeting and Fiscal Policy: Tax, expenditure, budgetary deficits, pension and fiscal reforms, Public debt management and reforms, Fiscal Responsibility and Budget Management (FRBM) Act, Black money and Parallel economy in India definition, estimates, genesis, consequences and remedies.
STATISTICSI (Objective Type)  UPSC IES ISS Study Material PDF
(i) Probability:
Classical and axiomatic definitions of Probability and consequences. Law of total probability, Conditional probability, Bayes’ theorem and applications. Discrete and continuous random variables. Distribution functions and their properties.
Standard discrete and continuous probability distributions – Bernoulli, Uniform, Binomial, Poisson, Geometric, Rectangular, Exponential, Normal, Cauchy, Hyper geometric, Multinomial, Laplace, Negative binomial, Beta, Gamma, Lognormal. Random vectors, Joint and marginal distributions, conditional distributions, Distributions of functions of random variables. Modes of convergences of sequences of random variables – in distribution, in probability, with probability one and in mean square. Mathematical expectation and conditional expectation.
Characteristic function, moment and probability generating functions, Inversion, uniqueness and continuity theorems. Borel 01 law, Kolmogorov’s 01 law. Tchebycheff’s and Kolmogorov’s inequalities. Laws of large numbers and central limit theorems for independent variables.
(ii) Statistical Methods:
Collection, compilation and presentation of data, charts, diagrams and histogram. Frequency distribution. Measures of location, dispersion, skewness and kurtosis. Bivariate and multivariate data. Association and contingency. Curve fitting and orthogonal polynomials. Bivariate normal distribution. Regressionlinear, polynomial. Distribution of the correlation coefficient, Partial and multiple correlation, Intraclass correlation, Correlation ratio.
Standard errors and large sample test. Sampling distributions of sample mean, sample variance, t, chisquare and F; tests of significance based on them, Small sample tests.
Nonparametric testsGoodness of fit, sign, median, run, Wilcoxon, MannWhitney, WaldWolfowitz and KolmogorovSmirnov. Order statisticsminimum, maximum, range and median. Concept of Asymptotic relative efficiency.
(iii) Numerical Analysis:
Finite differences of different orders: ∆, E and D operators, factorial representation of a polynomial, separation
of symbols, subdivision of intervals, differences of zero.
Concept of interpolation and extrapolation: Newton Gregory’s forward and backward interpolation formulae for equal intervals, divided differences and their properties, Newton’s formula for divided difference, Lagrange’s formula for unequal intervals, central difference formula due to Gauss, Sterling and Bessel, concept of error terms in interpolation formula.
Inverse interpolation: Different methods of inverse interpolation.
Numerical differentiation: Trapezoidal, Simpson’s onethird and threeeight rule and Waddles rule.
Summation of Series: Whose general term (i) is the first difference of a function (ii) is in geometric progression.
Numerical solutions of differential equations: Euler’s Method, Milne’s Method, Picard’s Method and RungeKutta Method.
(iv) Computer application and Data Processing:
Basics of Computer: Operations of a computer, Different units of a computer system like central processing unit, memory unit, arithmetic and logical unit, input unit, output unit etc., Hardware including different types of input,
output and peripheral devices, Software, system and application software, number systems, Operating systems, packages and utilities, Low and High level languages, Compiler, Assembler, Memory – RAM, ROM, unit of computer memory (bits, bytes etc.), Network – LAN, WAN, internet, intranet, basics of computer security, virus, antivirus, firewall, spyware, malware etc.
Basics of Programming: Algorithm, Flowchart, Data, Information, Database, overview of different programming languages, frontend and backend of a project, variables, control structures, arrays and their usages, functions, modules, loops, conditional statements, exceptions, debugging and related concepts.
STATISTICS II (Objective Type)
(i) Linear Models:
Theory of linear estimation, GaussMarkov linear models, estimable functions, error and estimation space, normal equations and least square estimators, estimation of error variance, estimation with correlated observations, properties of least square estimators, generalized inverse of a matrix and solution of normal equations, variances and covariances of least square estimators.
One way and twoway classifications, fixed, random and mixed effects models. Analysis of variance (twoway classification only), multiple comparison tests due to Tukey, Scheffe and StudentNewmannKeulDuncan.
(ii) Statistical Inference and Hypothesis Testing:
Characteristics of good estimator. Estimation methods of maximum likelihood, minimum chisquare, moments and least squares. Optimal properties of maximum likelihood estimators. Minimum variance unbiased estimators.
Minimum variance bound estimators. CramerRao inequality. Bhattacharya bounds. Sufficient estimator. factorization theorem. Complete statistics. RaoBlackwell theorem. Confidence interval estimation. Optimum confidence bounds. Resampling, Bootstrap and Jacknife.
Hypothesis testing: Simple and composite hypotheses. Two kinds of error. Critical region. Different types of critical regions and similar regions. Power function. Most powerful and uniformly most powerful tests. NeymanPearson fundamental lemma. Unbiased test. Randomized test. Likelihood ratio test. Wald’s SPRT, OC and ASN functions. Elements of decision theory.
(iii) Official Statistics:
 National and International official statistical system Official Statistics: (a) Need, Uses, Users, Reliability, Relevance, Limitations, Transparency, its visibility (b) Compilation, Collection, Processing, Analysis and Dissemination, Agencies Involved, Methods
 National Statistical Organization: Vision and Mission, NSSO and CSO; roles and responsibilities; Important activities, Publications etc.
 National Statistical Commission: Need, Constitution, its role, functions etc; Legal Acts/ Provisions/ Support for Official Statistics; Important Acts
 Index Numbers: Different Types, Need, Data Collection Mechanism, Periodicity, Agencies Involved, Uses
 Sector Wise Statistics: Agriculture, Health, Education, Women and Child etc. Important Surveys & Census, Indicators, Agencies and Usages etc.
 National Accounts: Definition, Basic Concepts; issues; the Strategy, Collection of Data and Release.
 Population Census: Need, Data Collected, Periodicity, Methods of data collection, dissemination, Agencies involved.
Misc: Socio Economic Indicators, Gender Awareness/Statistics, Important Surveys and Censuses.
STATISTICS III (Descriptive Type)  UPSC IES ISS Study Material PDF
(i) Sampling Techniques:
Concept of population and sample, need for sampling, complete enumeration versus sampling, basic concepts in sampling, sampling and Nonsampling error, Methodologies in sample surveys (questionnaires, sampling design and methods followed in field investigation) by NSSO. Subjective or purposive sampling, probability sampling or random sampling, simple random sampling with and without replacement, estimation of population mean, population proportions and their standard errors. Stratified random sampling, proportional and optimum allocation, comparison with simple random sampling for fixed sample size. Covariance and Variance Function.
Ratio, product and regression methods of estimation, estimation of population mean, evaluation of Bias and Variance to the first order of approximation, comparison with simple random sampling.
Systematic sampling (when population size (N) is an integer multiple of sampling size (n)). Estimation of population mean and standard error of this estimate, comparison with simple random sampling.
Sampling with probability proportional to size (with and without replacement method), Des Raj and Das estimators for n=2, HorvitzThomson’s estimator
Equal size cluster sampling: estimators of population mean and total and their standard errors, comparison of cluster sampling with SRS in terms of intraclass correlation coefficient.
Concept of multistage sampling and its application, twostage sampling with equal number of second stage units, estimation of population mean and total. Double sampling in ratio and regression methods of estimation.
Concept of Interpenetrating subsampling.
(ii) Econometrics:
 Nature of econometrics, the general linear model (GLM) and its extensions, ordinary least squares (OLS) estimation and prediction, generalized least squares (GLS) estimation and prediction, heteroscedastic disturbances, pure and mixed estimation. Auto correlation, its consequences and tests. Theil BLUS procedure, estimation and prediction, multicollinearity problem, its implications and tools for handling the problem, ridge regression.
 Linear regression and stochastic regression, instrumental variable estimation, errors in variables, autoregressive linear regression, lagged variables, distributed lag models, estimation of lags by OLS method, Koyck’s geometric lag model.
 Simultaneous linear equations model and its generalization, identification problem, restrictions on structural parameters, rank and order conditions.
 Estimation in simultaneous equations model, recursive systems, 2 SLS estimators, limited information estimators, kclass estimators, 3 SLS estimator, full information maximum likelihood method, prediction and simultaneous confidence intervals.
(iii) Applied Statistics:
 Index Numbers: Price relatives and quantity or volume relatives, Link and chain relatives composition of index numbers; Laspeyre’s, Paasches’, Marshal Edgeworth and Fisher index numbers; chain base index number, tests for index number, Construction of index numbers of wholesale and consumer prices, Income distributionPareto and Engel curves, Concentration curve, Methods of estimating national income, Intersectoral flows, Interindustry table, Role of CSO. Demand Analysis
 Time Series Analysis: Economic time series, different components, illustration, additive and multiplicative models, determination of trend, seasonal and cyclical fluctuations.
Timeseries as discrete parameter stochastic process, auto covariance and autocorrelation functions and their properties.  Exploratory time Series analysis, tests for trend and seasonality, exponential and moving average smoothing. Holt and Winters smoothing, forecasting based on smoothing.
Detailed study of the stationary processes: (1) moving average (MA), (2) auto regressive (AR), (3) ARMA and (4) AR integrated MA (ARIMA) models. BoxJenkins models, choice of AR and MA periods.  Discussion (without proof) of estimation of mean, auto covariance and autocorrelation functions under large sample theory, estimation of ARIMA model parameters.
 Spectral analysis of weakly stationary process, periodogram and correlogram analyses, computations based on Fourier transform.
STATISTICSIV (Descriptive Type)
(Equal number of questions i.e. 50% weightage from all the subsections below and candidates have to choose any two subsections and answer)
(i) Operations Research and Reliability:
Definition and Scope of Operations Research: phases in Operation Research, models and their solutions, decisionmaking under uncertainty and risk, use of different criteria, sensitivity analysis.
Transportation and assignment problems. Bellman’s principle of optimality, general formulation, computational methods and application of dynamic programming to LPP.
Decisionmaking in the face of competition, twoperson games, pure and mixed strategies, existence of solution and uniqueness of value in zerosum games, finding solutions in 2×2, 2xm and mxn games.
Analytical structure of inventory problems, EOQ formula of Harris, its sensitivity analysis and extensions allowing quantity discounts and shortages. Multiitem inventory subject to constraints. Models with random demand, the static risk model. P and Q systems with constant and random lead times.
Queuing models – specification and effectiveness measures. Steadystate solutions of M/M/1 and M/ M/ c models with associated distributions of queuelength and waiting time. M/ G/ 1 queue and PollazcekKhinchine result.
Sequencing and scheduling problems. 2machine njob and 3machine njob problems with identical machine sequence for all jobs
Branch and Bound method for solving travelling salesman problem.
Replacement problems – Block and age replacement policies.
PERT and CPM – basic concepts. Probability of project completion.
Reliability concepts and measures, components and systems, coherent systems, reliability of coherent systems.
Lifedistributions, reliability function, hazard rate, common univariate life distributions – exponential, weibull, gamma, etc. Bivariate exponential distributions. Estimation of parameters and tests in these models.
Notions of aging – IFR, IFRA, NBU, DMRL and NBUE classes and their duals. Loss of memory property of the exponential distribution.
Reliability estimation based on failure times in variously censored lifetests and in tests with replacement of failed items. Stressstrength reliability and its estimation.
(ii) Demography and Vital Statistics:
Sources of demographic data, census, registration, adhoc surveys, Hospital records, Demographic profiles of the Indian Census.
Complete life table and its main features, Uses of life table. Makehams and Gompertz curves. National life tables.
UN model life tables. Abridged life tables. Stable and stationary populations.
Measurement of Fertility: Crude birth rate, General fertility rate, Age specific birth rate, Total fertility rate, Gross reproduction rate, Net reproduction rate.
Measurement of Mortality: Crude death rate, Standardized death rates, Agespecific death rates, Infant Mortality rate, Death rate by cause.
Internal migration and its measurement, migration models, concept of international migration. Net migration. International and postcensal estimates. Projection method including logistic curve fitting. Decennial population census in India.
(iii) Survival Analysis and Clinical Trial:
Concept of time, order and random censoring, likelihood in the distributions – exponential, gamma, Weibull, lognormal, Pareto, Linear failure rate, inference for these distribution.
Life tables, failure rate, mean residual life and their elementary classes and their properties.
Estimation of survival function – actuarial estimator, Kaplan – Meier estimator, estimation under the assumption of IFR/ DFR, tests of exponentiality against nonparametric classes, total time on test.
Two sample problem – Gehan test, log rank test.
Semiparametric regression for failure rate – Cox’s proportional hazards model with one and several covariates, rank test for the regression coefficient.
Competing risk model, parametric and nonparametric inference for this model.
Introduction to clinical trials: the need and ethics of clinical trials, bias and random error in clinical studies, conduct of clinical trials, overview of Phase I – IV trials, multicenter trials.
Data management: data definitions, case report forms, database design, data collection systems for good clinical practice.
Design of clinical trials: parallel vs. crossover designs, crosssectional vs. longitudinal designs, review of factorial designs, objectives and endpoints of clinical trials, design of Phase I trials, design of singlestage and multistage
Phase II trials, design and monitoring of phase III trials with sequential stopping,
Reporting and analysis: analysis of categorical outcomes from Phase I – III trials, analysis of survival data from clinical trials.
(iv) Quality Control:
Statistical process and product control: Quality of a product, need for quality control, basic concept of process control, process capability and product control, general theory of control charts, causes of variation in quality, control limits, sub grouping summary of out of control criteria, charts for attributes p chart, np chart, cchart, V chart, charts for variables: R, (X ,R), (X ,σ) charts.
Basic concepts of process monitoring and control; process capability and process optimization.
General theory and review of control charts for attribute and variable data; O.C. and A.R.L. of control charts; control by gauging; moving average and exponentially weighted moving average charts; CuSum charts using Vmasks and decision intervals; Economic design of Xbar chart.
Acceptance sampling plans for attributes inspection; single and double sampling plans and their properties; plans for inspection by variables for onesided and two sided specification.
(v) Multivariate Analysis:
Multivariate normal distribution and its properties. Random sampling from multivariate normal distribution.
Maximum likelihood estimators of parameters, distribution of sample mean vector.
Wishart matrix – its distribution and properties, distribution of sample generalized variance, null and nonnull distribution of multiple correlation coefficients.
Hotelling’s T2 and its sampling distribution, application in test on mean vector for one and more multivariate normal population and also on equality of components of a mean vector in multivariate normal population.
Classification problem: Standards of good classification, procedure of classification based on multivariate normal distributions.
Principal components, dimension reduction, canonical variates and canonical correlation – definition, use, estimation and computation.
(vi) Design and Analysis of Experiments:
Analysis of variance for one way and two way classifications, Need for design of experiments, basic principle of experimental design (randomization, replication and local control), complete analysis and layout of completely randomized design, randomized block design and Latin square design, Missing plot technique. Split Plot Design and Strip Plot Design.
Factorial experiments and confounding in 2n and 3n experiments. Analysis of covariance. Analysis of nonorthogonal data. Analysis of missing data.
(vii) Computing with C and R :
Basics of C: Components of C language, structure of a C program, Data type, basic data types, Enumerated data types, Derived data types, variable declaration, Local, Global, Parametric variables, Assignment of Variables, Numeric, Character, Real and String constants, Arithmetic, Relation and Logical operators, Assignment operators, Increment and decrement operators, conditional operators, Bitwise operators, Type modifiers and expressions, writing and interpreting expressions, using expressions in statements. Basic input/ output.
Control Statements: conditional statements, if – else, nesting of if – else, else if ladder, switch statements, loops in. c, for, while, do – while loops, break, continue, exit ( ), goto and label declarations, One dimensional two dimensional and multidimensional arrays. Storage classes: Automatic variables, External variables, Static variables, Scope and lifetime of declarations.
Functions: classification of functions, functions definition and declaration, assessing a function, return statement, parameter passing in functions. Pointers (concept only).
Structure: Definition and declaration; structure (initialization) comparison of structure variable; Array of Structures: array within structures, structures within structures, passing structures to functions; Unions accessing a union member, union of structure, initialization of a union variable, uses of union. Introduction to linked list, linear linked list, insertion of a node in list, removal of a node from list.
Files in C: Defining and opening a file, input – output operation on a file, creating a file, reading a file. Statistics Methods and techniques in R.
List of Top 10 IES / ISS Preparation Books  UPSC IES ISS Study Material PDF
Author Name  Author Name 
Indian Economy Since Independence  Uma Kapila 
Programmed Statistics (QuestionAnswers)  B.L. Agarwal 
Objective general studies  Ksg 
Handbook of the Economics and Political Economy of Transition  Paul Hare, Gerard Turley 
New Cambridge Advanced English Teacher’s Book  Leo Jones 
Upkar’s Gateway to IES  Ashish Dixit 
Modern Applied Statistics with S  SW.N. Venables, B.D. Ripley 
Cambridge English S Book  James Styring, Nicholas Tims 
Construction Economics: A New Approach  Danny Myers 
Construction Economics: A New Approach  Danny Myers 
UPSC IESISS Exam Centres
Ahmedabad  Jammu 
Bengaluru  Kolkata 
Bhopal  Lucknow 
Chandigarh  Mumbai 
Chennai  Patna 
Cuttack  Prayagraj (Allahabad) 
Delhi  Shillong 
Dispur  Shimla 
Hyderabad  Thiruvananthapuram 
Jaipur  – 
UPSC IES ISS Admit Card 2021 : UPSC IES ISS Study Material PDF
The admit card of the UPSC IES ISS 2021 exam will be issued on the official website. The date of issue of the hall ticket will be updated in the official notification by the authorities. The exam conducting is not responsible to send the admit card to all the registered candidates of UPSC IES ISS .
Steps to Download the Admit Card of UPSC IES ISS
 Visit the official website of UPSC IES ISS
 Choose the link to the UPSC IES ISS group for which you have applied
 Enter the registered login ID and password
 Now click on the link to download the UPSC IES ISS admit card
 Download the admit card and check all the necessary details as the date of birth, name, gender, roll number, exam date, time, sign, exam center, candidate’s category, etc.
 Now, take out the print to carry at the exam center of UPSC IES ISS . (A valid Id card is mandatory for all the candidates to carry at the exam center along with the admit card of UPSC IES ISS 2021)
UPSC IES ISS Result 2021 : UPSC IES ISS Study Material PDF
The authorities will issue the result of the UPSC IES ISS exam on the official website separately for all the groups. To check and download the result of UPSC IES ISS candidates can follow the steps provided below:
 Visit the official website of UPSC IES ISS
 Select the result notification from the notification section
 Click on the UPSC IES ISS result notification
 Now, select and open the PDF of your group
 Enter the registration number in the search bar to check your score on the UPSC IES ISS exam
 Download and save a copy of the PDF for future reference.
UPSC IES ISS Cut Off
The UPSC IES ISS Cut Off 2021 is released by the UPSC IES ISS after the preliminary exam has been conducted. The UPSC IES ISS Cut Off changes each year depending on a variety of factors. These factors include:
 The number of candidates applying for the post.
 The more the candidates, the higher the cut off.
 The number of vacancies for the post. The higher the vacancies, the lower the cut off.
 The difficulty of the examination. The more difficult the exam, the lower the cut off.
 Overall scoring pattern in the exam.
 The higher the difficulty of the examination, the lower will be the cut off.
UPSC IES ISS FAQs : UPSC IES ISS Study Material PDF
Q: What is the minimum age to apply for IES ISS exam?
Q: Can engineers apply for IES ISS exam?
