Measuring Economic Welfare

Professor McKenzie proposes and formulates a method composed of operational procedures designed to facilitate the evaluation of economic projects and policies. This method is discussed fully, illustrated by simple examples, and compared with alternative procedures. An outline of a computer program that enables readers to undertake their own calculations is included. In order to present the approach clearly, the author provides an exposition of the fundamental ideas and the main alternative approaches to the problem. These rely on various forms of index numbers and consumer surplus. However, as is well known, such measures are not capable of correctly ordering the various alternatives under consideration, except under highly unrealist assumptions. In this book the author suggests the abandonment of this traditional approach based on the concept of 'willingness-to-pay' or the conpensating variation. Instead, the measure that Samuelson has called the 'money-metric' should become the cornerstone of applied welfare economics.

Calls for a more people-focused approach to statistics on economic performance, and concerns about inequality, environmental impacts, and effects of digitalization have put welfare at the top of the measurement agenda. This paper argues that economic welfare is a narrower concept than well-being. The new focus implies a need to prioritize filling data gaps involving the economic welfare indicators of the System of National Accounts 2008 (SNA) and improving their quality, including the quality of the consumption price indexes. Development of distributional indicators of income, consumption, and wealth should also be a priority. Definitions and assumptions can have big effects on these indicators and should be documented. Concerns have also arisen over potentially overlooked welfare growth from the emergence of the digital economy. However, the concern that free online platforms are missing from nominal GDP is incorrect. Also, many of the welfare effects of digitalization require complementary indicators, either because they are conceptually outside the boundary of GDP or impossible to quantify without making uncertain assumptions.

In spite of recurrent criticism and an impressive production of alternative indicators by scholars and NGOs, GDP remains the central indicator of countries' success. This book revisits the foundations of indicators of social welfare, and critically examines the four main alternatives to GDP that have been proposed: composite indicators, subjective well-being indexes, capabilities (the underlying philosophy of the Human Development Index), and equivalent incomes. Its provocative thesis is that the problem with GDP is not that it uses a monetary metric but that it focuses on a narrow set of aspects of individual lives. It is actually possible to build an alternative, more comprehensive, monetary indicator that takes income as its first benchmark and adds or subtracts corrections that represent the benefit or cost of non-market aspects of individual lives. Such a measure can respect the values and preferences of the people and give as much weight as they do to the non-market dimensions. A further provocative idea is that, in contrast, most of the currently available alternative indicators, including subjective well-being indexes, are not as respectful of people's values because, like GDP, they are too narrow and give specific weights to the various dimensions of life in a more uniform way, without taking account of the diversity of views on life in the population. The popular attraction that such alternative indicators derive from being non-monetary is therefore based on equivocation. Moreover, it is argued in this book that "greening" GDP and relative indicators is not the proper way to incorporate sustainability concerns. Sustainability involves predicting possible future paths, therefore different indicators than those assessing the current situation. While various indicators have been popular (adjusted net savings, ecological footprint), none of them involves the necessary forecasting effort that a proper evaluation of possible futures requires.

This volume presents an approach to the evaluation of economic policies through the econometric modeling of aggregate consumer behavior. While the preferences of individual consumers are revealed by their market choices, these preferences can be recovered only by econometric methods, not through the index numbers used in the official statistics. The richer and more robust methodology presented in this volume provides a fruitful point of departure for future policy evaluations. The econometric approach replaces ordinal measures of individual welfare that cannot be compared among individuals with cardinal measures that can. These are combined into an indicator of social welfare that reflects principles of horizontal and vertical equity. This approach unifies the measurement of poverty, inequality, and cost and standard of living. It extends the scope of normative economics to a broader range of issues in the evaluation of economic and social policies.

Disputes over government policies rage in a number of areas. From taxation to climate change, from public finance to risk regulation, and from health care to infrastructure planning, advocates debate how policies affect multiple dimensions of individual well-being, how these effects balance against each other, and how trade-offs between overall well-being and inequality should be resolved. How to measure and balance well-being gains and losses is a vexed issue. Matthew D. Adler advances the debate by introducing the social welfare function (SWF) framework and demonstrating how it can be used as a powerful tool for evaluating governmental policies. The framework originates in welfare economics and in philosophical scholarship regarding individual well-being, ethics, and distributive justice. It has three core components: a well-being measure, which translates each of the possible policy outcomes into an array of interpersonally comparable well-being numbers, quantifying how well off each person in the population would be in that outcome; a rule for ranking outcomes thus described; and an uncertainty module, which orders policies understood as probability distributions over outcomes. The SWF framework is a significant improvement compared to cost-benefit analysis (CBA), which quantifies policy impacts in dollars, is thereby biased towards the rich, and is insensitive to the distribution of these monetized impacts. The SWF framework, by contrast, uses an unbiased measure of well-being and allows the policymaker to consider both efficiency (total well-being) and equity (the distribution of well-being). Because the SWF framework is a fully generic methodology for policy assessment, Adler also discusses how it can be implemented to inform government policies. He illustrates it through a detailed case study of risk regulation, contrasting the implications of results of SWF and CBA. This book provides an accessible, yet rigorous overview of the SWF approach that can inform policy-makers and students.

The Welfare Economics of Public Policy is a great book that should be of interest to all economists interested in applied welfare analysis. It is a good reference book for economists studying the effects of public policy. Finally, it should be a useful textbook for students studying economic policy and applied welfare economics. Jean-Paul Chavas, American Journal of Agricultural Economics . . . a very comprehensive overview of the state of the art in welfare economics. It can be used as a teaching book for advanced students as well as a reference volume for researchers. This duality of possible uses is supported by the fact that very complex issues are presented in an easily readable manner. More technical aspects are then outlined in the appendices of the relevant chapters, offering colleagues the option to study formal considerations in more detail. . . a welcome addition to and expression of the knowledge base of agricultural economics. Stefan Mann, Journal of Agricultural Economics I am absolutely delighted that the authors have revised and republished this text. I have used the previous version for years in my graduate environmental economics course; usually I had to share the one copy I have with students and I felt it was a shame that these students did not have the opportunity to purchase the book since every serious environmental economist should have this volume on their shelf. It has been a continuous reference volume for me over the years and I am sure this is true of many others in the discipline. In the field of applied welfare analysis (spanning environmental economics, international trade, agricultural policy, etc.) there is no need for further elaboration when Just, Hueth and Schmitz is referenced. Everyone knows the book that is being referred to: the bible of applied welfare economics. Catherine Kling, Iowa State University, US For the record, I am one of the people who requested that the authors revise and re-issue their textbook. It is an extremely valuable book for applied economists; as with the previous edition, I will use it extensively in two of my courses and consult it frequently in my own research endeavors. Richard Adams, Oregon State University, US The original book is very well known in our profession and is still used in many classes. It will be wonderful to have a revised edition of this classic book. Colin Carter, University of California, Davis, US This outstanding text, a follow-up to the authors award-winning 1982 text, provides a thorough treatment of economic welfare theory and develops a complete theoretical and empirical framework for applied project and policy evaluation. The authors illustrate how this theory can be used to develop policy analysis from both theory and estimation in a variety of areas including: international trade, the economics of technological change, agricultural economics, the economics of information, environmental economics, and the economics of extractive and renewable natural resources. Building on willingness-to-pay (WTP) measures as the foundation for applied welfare economics, the authors develop measures for firms and households where households are viewed as both consumers and owner/sellers of resources. Possibilities are presented for (1) approximating WTP with consumer surplus, (2) measuring WTP exactly subject to errors in existing econometric work, and (3) using duality theory to specify econometric equations consistent with theory. Later chapters cover specific areas of welfare measurement under imperfect competition, uncertainty, incomplete information, externalities, and dynamic considerations. Applications are considered explicitly for policy issues related to information, international trade, the environment, agriculture, and other natural resource issues. The Welfare Economics of Public Policy is ideal for graduate and undergraduate courses in applied welfare economics, public policy, agricultural policy, and environmental economi