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| Economic theory | |
|---|---|
| Name | Economic theory |
| Discipline | Economics |
| Notable people | Adam Smith, David Ricardo, John Maynard Keynes, Milton Friedman, Paul Samuelson, Amartya Sen, Karl Marx, Alfred Marshall, Leon Walras, Friedrich Hayek |
Economic theory Economic theory is the body of abstract principles and models used to analyze allocation, production, distribution, and exchange across societies, drawing on insights from Adam Smith, David Ricardo, John Maynard Keynes, Milton Friedman, Karl Marx and institutions such as the London School of Economics, Massachusetts Institute of Technology, University of Chicago, Cambridge University, and Harvard University. It synthesizes mathematical frameworks influenced by Isaac Newton‑era formalism, adaptations found in works like The Wealth of Nations, Principles of Political Economy and Taxation, and The General Theory of Employment, Interest and Money, and policy debates spanning Bretton Woods Conference, New Deal, Chicago School, and European Union regulatory regimes. Economists publish and debate in venues such as The American Economic Review, The Quarterly Journal of Economics, The Econometric Society, National Bureau of Economic Research, and professional bodies like the Royal Economic Society.
Economic theory provides formal models to interpret observed phenomena examined by figures such as John Stuart Mill, Alfred Marshall, Paul Krugman, Joseph Stiglitz, and Amartya Sen, using methods taught at London School of Economics, Princeton University, Yale University, University of Chicago and promulgated in texts like Foundations of Economic Analysis and Mathematical Economics. It links micro-analytic tools derived from the work of Leon Walras, Vilfredo Pareto, Kenneth Arrow, and Gerard Debreu to macro frameworks rooted in Irving Fisher, John Maynard Keynes, Milton Friedman, Robert Solow, and Nobel Memorial Prize in Economic Sciences laureates. The discipline informs policy through advisory roles in institutions such as the International Monetary Fund, World Bank, Organisation for Economic Co-operation and Development, and central banks like the Federal Reserve System and European Central Bank.
The historical evolution traces from mercantile debates and texts by Adam Smith and David Ricardo through classical political economy, transitions at Manchester industrial contexts, and the marginal revolution led by William Stanley Jevons, Carl Menger, and Leon Walras. The 20th century saw syntheses in neoclassical economics associated with Alfred Marshall and Paul Samuelson, Keynesian revolutions through John Maynard Keynes and policy shifts during New Deal and Bretton Woods Conference, and countercurrents from Friedrich Hayek, Milton Friedman, Karl Popper, and Chicago School debates. Later developments incorporate welfare analyses from Amartya Sen, mechanism design from Leonid Hurwicz, Eric Maskin, and Roger Myerson, and behavioral contributions from Daniel Kahneman and Richard Thaler.
Core concepts include utility maximization modeled by Vilfredo Pareto efficiency and consumer choice theory advanced by Alfred Marshall and John Hicks, production functions like the Cobb–Douglas production function and analyses rooted in David Ricardo's comparative advantage. Market structures are formalized through oligopoly models by Joseph Bertrand and Jean Tirole and monopoly frameworks discussed since Adam Smith and John Stuart Mill. General equilibrium theory draws on Leon Walras, Kenneth Arrow, and Gerard Debreu; game theory foundations owe to John von Neumann and Oskar Morgenstern, expanded by John Nash, Reinhard Selten, and Robert Aumann. Macroeconomic models include the IS‑LM framework by John Hicks and Alfred Marshall's influences, the Phillips curve deriving from A.W. Phillips, and growth models by Robert Solow and Trevor Swan.
Major schools comprise neoclassical economics associated with Alfred Marshall and Paul Samuelson, Keynesianism from John Maynard Keynes and Joan Robinson, monetarism led by Milton Friedman and Anna Schwartz, the Chicago School with Gary Becker and Ronald Coase, Austrian economics linked to Ludwig von Mises and Friedrich Hayek, Marxian economics stemming from Karl Marx and Friedrich Engels, institutional economics influenced by Thorstein Veblen and John R. Commons, and behavioral economics developed by Daniel Kahneman, Amos Tversky, and Richard Thaler. Applied subfields include development economics with scholars like Amartya Sen and Jeffrey Sachs, labor economics featuring Gary Becker and James Heckman, and financial economics cultivated at INSEAD and London Business School.
Methodology employs formal models, econometrics, and experimental methods refined by institutions like The Econometric Society, National Bureau of Economic Research, and researchers such as Clive Granger, Jan Tinbergen, and James Heckman. Mathematical tools include optimization and constrained maximization from the calculus traditions of Isaac Newton and Gottfried Wilhelm Leibniz, linear algebra and fixed‑point theorems used by Leon Walras and Kenneth Arrow, stochastic processes in time‑series models from Norbert Wiener and Andrey Kolmogorov, and game‑theoretic solution concepts by John Nash and Robert Aumann. Empirical strategies rely on instrumental variables developed in work by Trygve Haavelmo and causal inference methods popularized by Donald Rubin and Judea Pearl.
Economic theory informs fiscal policy implemented in New Deal programs, monetary policy conducted by the Federal Reserve System and European Central Bank, trade negotiations at World Trade Organization and GATT predecessors, and development programs coordinated by the World Bank and International Monetary Fund. It underpins regulatory analysis used by bodies like the European Commission and U.S. Securities and Exchange Commission, competition policy shaped by precedents such as United States v. Microsoft Corporation, and welfare assessments drawing on Amartya Sen's work for United Nations development indicators.
Critiques arise from heterodox traditions such as Karl Marxist analysis, Friedrich Hayek's knowledge problem critiques, and behavioral findings by Daniel Kahneman and Amos Tversky challenging rational agent assumptions. Methodological concerns are raised by scholars at Cambridge University and Oxford University about model idealizations, empirical replication debates in journals like The American Economic Review, and distributional critiques featured in International Labour Organization reports. Practical limits appear in crises examined in Great Depression, 2008 financial crisis, and policy failures studied by Joseph Stiglitz and Paul Krugman.