Public interest theory
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Public interest theory is an economic theory first developed by Arthur Cecil Pigou that holds that regulation is supplied in response to the demand of the public for the correction of inefficient or inequitable market practices. Regulation is assumed initially to benefit society as a whole rather than particular vested interests. The regulatory body is considered to represent the interest of the society in which it operates rather than the private interests of the regulators.
The public interest view holds that governments regulate banks to facilitate the efficient functioning of banks by ameliorating market failures, for the benefit of broader civil society. In banking, the public interest would be served if the banking system allocated resources in a socially efficient manner (i.e. “maximizing output and minimizing variance” ) and performed well other functions of finance.
Public interest theory is usually contrasted with public choice theory that is more cynical about government behaviour and motives, and sees regulation as being socially inefficient. Moreover, according to Stigler  regulation can be captured by incumbent firms to protect the market from the entry of competitors. Critics believe this will only occur when the public demands a better allocative efficiency.
- Pigou, A. C. (1932) The Economics of Welfare. London: Macmillan and Co.
- Deegan, C., Unerman, J. (2011) Financial Accounting Theory. Maidenhead: McGraw-Hill Education.
- Richard A. Posner, Theories of Economic Regulation, The Bell Journal of Economics and Management Science, Vol. 5, No. 2 (Autumn, 1974), pp. 335-358
- Misham, E. J. (1969) Welfare Economics: An assessment (Amsterdam and London: North Holland publishing company.
- Levine (1997) notes that these other functions consist of facilitating payments, mobilising and pooling savings from disparate savers, allocating capital, monitoring firms and managers, and providing tools for the management and trading of a variety of risk.
- Stigler, G.J. 1972. "The Theory of Economic Regulation". Bell Journal of Economics and Management Science 11: 3-21.
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