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Public choice theory (or Public choice) is "the use of economic tools to deal with traditional problems of political science". Its content includes the study of political behavior. In political science, it is the subset of positive political theory that studies self-interested agents (voters, politicians, bureaucrats) and their interactions, which can be represented in a number of ways – using (for example) standard constrained utility maximization, game theory, or decision theory.
The Journal of Economic Literature's classification code regards public choice as a subarea of Microeconomics, under JEL: D7: "Analysis of Collective Decision-Making" (specifically, JEL: D72: "Economic Models of Political Processes: Rent-Seeking, Elections, Legislatures, and Voting Behavior").
Public Choice analysis has roots in positive analysis ("what is") but is often used for normative purposes ("what ought to be") in order to identify a problem or to suggest improvements to constitutional rules (i.e., constitutional economics).
Public choice theory is also closely related to social-choice theory, a mathematical approach to aggregation of individual interests, welfares, or votes. Much early work had aspects of both, and both fields use the tools of economics and game theory. Since voter behavior influences the behavior of public officials, public-choice theory often uses results from social-choice theory. General treatments of public choice may also be classified under public economics.
Background and development
A precursor of modern public choice theory was the work of Knut Wicksell (1896), which treated government as political exchange, a quid pro quo, in formulating a benefit principle linking taxes and expenditures.
Some subsequent economic analysis has been described as treating government as though it attempted "to maximize some kind sort of welfare function for society" and as distinct from characterizations of economic agents, such as those in business. In contrast, public choice theory modeled government as made up of officials who, besides pursuing the public interest, might act to benefit themselves, for example in the budget-maximizing model of bureaucracy, possibly at the cost of efficiency.
Modern public-choice theory has been dated from the work of Duncan Black, sometimes called "the founding father of public choice". In a series of papers from 1948, which culminated in The Theory of Committees and Elections (1958), and later, Black outlined a program of unification toward a more general "Theory of Economic and Political Choices" based on common formal methods, developed underlying concepts of what would become median voter theory, and rediscovered earlier works on voting theory.
Kenneth J. Arrow's Social Choice and Individual Values (1951) influenced formulation of the theory. Among other important works are Anthony Downs (1957) An Economic Theory of Democracy and Mancur Olson (1965) The Logic of Collective Action.
James M. Buchanan and Gordon Tullock coauthored The Calculus of Consent: Logical Foundations of Constitutional Democracy (1962), considered one of the landmarks in public choice. In particular, the preface describes the book as "about the political organization" of a free society. But its methodology, conceptual apparatus, and analytics "are derived, essentially, from the discipline that has as its subject the economic organization of such a society" (1962, p. v). The book focuses on positive-economic analysis as to the development of constitutional democracy but in an ethical context of consent. The consent takes the form of a compensation principle like Pareto efficiency for making a policy change and unanimity or at least no opposition as a point of departure for social choice.
Somewhat later, the probabilistic voting theory started to displace the median voter theory in showing how to find Nash equilibria in multidimensional space. The theory was later formalized further by Peter Coughlin.
Decision-making processes and the state
One way to organize the subject matter studied by public choice theorists is to begin with the foundations of the state itself. According to this procedure, the most fundamental subject is the origin of government. Although some work has been done on anarchy, autocracy, revolution, and even war, the bulk of the study in this area has concerned the fundamental problem of collectively choosing constitutional rules. This work assumes a group of individuals who aim to form a government, then it focuses on the problem of hiring the agents required to carry out government functions agreed upon by the members.
Another major sub-field is the study of bureaucracy. The usual model depicts the top bureaucrats as being chosen by the chief executive and legislature, depending on whether the democratic system is presidential or parliamentary. The typical image of a bureau chief is a person on a fixed salary who is concerned with pleasing those who appointed him or her. The latter have the power to hire and fire him or her more or less at will. The bulk of the bureaucrats, however, are civil servants whose jobs and pay are protected by a civil service system against major changes by their appointed bureau chiefs. This image is often compared with that of a business owner whose profit varies with the success of production and sales, who aims to maximize profit, and who can in an ideal system hire and fire employees at will. William Niskanen is generally considered the founder of public choice literature on the bureaucracy.
"Expressive interests" and democratic irrationality
Geoffrey Brennan and Loren Lomasky claim that democratic policy is biased to favor "expressive interests" and neglect practical and utilitarian considerations. Brennan and Lomasky differentiate between instrumental interests (any kind of practical benefit, both monetary and non-monetary) and expressive interests (forms of expression like applause). According to Brennan and Lomasky, the paradox of voting can be resolved by differentiating between expressive and instrumental interests.
This argument has led some public choice scholars to claim that politics is plagued by irrationality. In articles published in the Econ Journal Watch, economist Bryan Caplan contended that voter choices and government economic decisions are inherently irrational. Caplan's ideas are more fully developed in his book The Myth of the Rational Voter (Princeton University Press 2007). Countering Donald Wittman's arguments in The Myth of Democratic Failure, Caplan claims that politics is biased in favor of irrational beliefs.
According to Caplan, democracy effectively subsidizes irrational beliefs. Anyone who derives utility from potentially irrational policies like protectionism can receive private benefits while imposing the costs of such beliefs on the general public. Were people to bear the full costs of their "irrational beliefs", they would lobby for them optimally, taking into account both their instrumental consequences and their expressive appeal. Instead, democracy oversupplies policies based on irrational beliefs. Caplan defines rationality mainly in terms of mainstream price theory, pointing out that mainstream economists tend to oppose protectionism and government regulation more than the general population, and that more educated people are closer to economists on this score, even after controlling for confounding factors such as income, wealth or political affiliation. One criticism is that many economists do not share Caplan's views on the nature of public choice. However, Caplan does have data to support his position. Economists have, in fact, often been frustrated by public opposition to economic reasoning. As Sam Peltzman puts it:
Economists know what steps would improve the efficiency of HSE [health, safety, and environmental] regulation, and they have not been bashful advocates of them. These steps include substituting markets in property rights, such as emission rights, for command and control ... The real problem lies deeper than any lack of reform proposals or failure to press them. It is our inability to understand their lack of political appeal.
Public choice's application to government regulation was developed by George Stigler (1971) and Sam Peltzman (1976).
Public choice theory is often used to explain how political decision-making results in outcomes that conflict with the preferences of the general public. For example, many advocacy group and pork barrel projects are not the desire of the overall democracy. However, it makes sense for politicians to support these projects. It may make them feel powerful and important. It can also benefit them financially by opening the door to future wealth as lobbyists. The project may be of interest to the politician's local constituency, increasing district votes or campaign contributions. The politician pays little or no cost to gain these benefits, as he is spending public money. Special-interest lobbyists are also behaving rationally. They can gain government favors worth millions or billions for relatively small investments. They face a risk of losing out to their competitors if they don't seek these favors. The taxpayer is also behaving rationally. The cost of defeating any one government give-away is very high, while the benefits to the individual taxpayer are very small. Each citizen pays only a few pennies or a few dollars for any given government favor, while the costs of ending that favor would be many times higher. Everyone involved has rational incentives to do exactly what they are doing, even though the desire of the general constituency is opposite. Costs are diffused, while benefits are concentrated. The voices of vocal minorities with much to gain are heard over those of indifferent majorities with little to individually lose. However the notion that groups with concentrated interests will dominate politics is incomplete because it is only one half of political equilibrium. Something must incite those preyed upon to resist even the best organized concentrated interests. In his article on interest groups Gary Becker identified this countervailing force as being the deadweight loss from predation. His views capped what has come to be known as the Chicago school of political economy and it has come in sharp conflict with the so-called Virginia faction of public choice due to its assertion that politics will tend towards efficiency due to nonlinear deadweight losses and due to its claim that political efficiency renders policy advice irrelevant.
While good government tends to be a pure public good for the mass of voters, there may be many advocacy groups that have strong incentives for lobbying the government to implement specific policies that would benefit them, potentially at the expense of the general public. For example, lobbying by the sugar manufacturers might result in an inefficient subsidy for the production of sugar, either direct or by protectionist measures. The costs of such inefficient policies are dispersed over all citizens, and therefore unnoticeable to each individual. On the other hand, the benefits are shared by a small special-interest group with a strong incentive to perpetuate the policy by further lobbying. Due to rational ignorance, the vast majority of voters will be unaware of the effort; in fact, although voters may be aware of special-interest lobbying efforts, this may merely select for policies which are even harder to evaluate by the general public, rather than improving their overall efficiency. Even if the public were able to evaluate policy proposals effectively, they would find it infeasible to engage in collective action in order to defend their diffuse interest. Therefore, theorists expect that numerous special interests will be able to successfully lobby for various inefficient policies. In public choice theory, such scenarios of inefficient government policies are referred to as government failure – a term akin to market failure from earlier theoretical welfare economics.
A field that is closely related to public choice is the study of rent-seeking. This field combines the study of a market economy with that of government. Thus, one might regard it as a new political economy. Its basic thesis is that when both a market economy and government are present, government agents provide numerous special market privileges. Both the government agents and self-interested market participants seek these privileges in order to partake in the resulting monopoly rent. Rentiers gain benefits above what the market would have offered, but in the process allocate resources in sub-optimal fashion from a societal point of view.
Rent-seeking is broader than public choice in that it applies to autocracies as well as democracies and, therefore, is not directly concerned with collective decision making. However, the obvious pressures it exerts on legislators, executives, bureaucrats, and even judges are factors that public choice theory must account for in its analysis of collective decision-making rules and institutions. Moreover, the members of a collective who are planning a government would be wise to take prospective rent-seeking into account.
Another major claim is that much of political activity is a form of rent-seeking which wastes resources. Gordon Tullock, Jagdish Bhagwati, and Anne Osborn Krueger have argued that rent-seeking has caused considerable waste. In a parallel line of research Fred McChesney claims that rent extraction causes considerable waste, especially in the developing world. As the term implies, rent extraction happens when officials use threats to extort payments from private parties.
From such results it is sometimes asserted that public choice theory has an anti-state tilt. But there is ideological diversity among public choice theorists. Mancur Olson for example was an advocate of a strong state and instead opposed political interest group lobbying. More generally, James Buchanan has suggested that public choice theory be interpreted as "politics without romance", a critical approach to a pervasive earlier notion of idealized politics set against market failure.
The British journalist, Alistair Cooke, commenting on the Nobel Prize awarded to James M. Buchanan in 1986, reportedly summarized the public choice view of politicians by saying, "Public choice embodies the homely but important truth that politicians are, after all, no less selfish than the rest of us."
Several notable public choice scholars have been awarded the Nobel Prize in Economics, including James M. Buchanan (1986), George Stigler (1982), Gary Becker (1992), Vernon Smith (2002) and Elinor Ostrom (2009). In addition, James Buchanan, Vernon Smith, and Elinor Ostrom were former presidents of the Public Choice Society.
- [E]ven if the model [with its rational self-interest assumptions] proves to be useful in explaining an important element of politics, it does not imply that all individuals act in accordance with the behavioral assumption made or that any one individual acts in this way at all times ... the theory of collective choice can explain only some undetermined fraction of collective action. However, so long as some part of all individual behavior ... is, in fact, motivated by utility maximization, and so long as the identification of the individual with the group does not extend to the point of making all individual utility functions identical, an economic-individualist model of political activity should be of some positive worth.
- Gordon Tullock,  2008, "public choice," The New Palgrave Dictionary of Economics. .
- Descriptions are in JEL Classification Codes Guide, drilled to at JEL: D7 and JEL: D72 respectively.
- James M. Buchanan, 1990. "The Domain of Constitutional Economics," Constitutional Political Economy, 1(1), pp. 1–18.
- Compare: Dennis C. Mueller, 2008. "constitutions, economic approach to," The New Palgrave Dictionary of Economics, 2nd Edition. Abstract: "The economic approach to constitutions applies the methodology of economics to the study of constitutions. This entry reviews the normative literature on constitutions, which assumes a two-stage collective decision process, and the positive literature that examines the decisions made by constitutional conventions and their economic consequences."
- Found in the JEL classification codes at JEL: D71.
- At JEL: HO – General of the JEL classification codes and as in The New Palgrave Dictionary of Economics, v. 8, p. 864 and Online.
- Knut Wicksell (1896 ). "A New Principle of Just Taxation," J.M. Buchanan, trans., in Richard A. Musgrave and Alan T. Peacock, ed. (1958). Classics in the Theory of Public Finance, Palgrave Macmillan, an essay from Wicksell (1896), Finanzthcoretische Untersuchungen, Jena: Gustav Fischer.
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• James M. Buchanan(1986). "The Constitution of Economic Policy," IV. Politics as Exchange & V. The Constitution of Economic Policy, Nobel Prize lecture. Republished in 1987, American Economic Review, 77(3), pp. 243–50 JSTOR 1804093.
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- Charles K. Rowley (2008). "Duncan Black (1908–1991," ch. 4 in Readings in Public Choice and Constitutional Political Economy, Springer, p. 83.
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- Peter J. Coughlin (1991). Probabilistic Voting Theory, Cambridge. Description and chapter-preview links.
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• Gordon Tullock,  2008. "public choice," The New Palgrave Dictionary of Economics. 2nd Edition. Abstract.
• Gary S. Becker, 1983. "A Theory of Competition Among Pressure Groups for Political Influence," Quarterly Journal of Economics, 98(3), pp. 371–400.
•_____, 1985. "Public Policies, Pressure Groups, and Dead-weight Costs," Journal of Public Economics, 28(3), pp. 329–47. Abstract and reprinted in George J. Stigler, ed., 1988, Chicago Studies in Political Economy, pp. 85–105.
- • Gordon Tullock,  2008. "rent seeking," The New Palgrave Dictionary of Economics, 2nd Edition. Abstract.
• _____, 1967. "The Welfare Costs of Tariffs, Monopolies, and Theft,"Western Economic Journal, later Economic Inquiry, 5(3), pp. 224–32.
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