Economic theories are infinitely diverse in their predictive power. Entirely too many have zero predictive power-they are statements of tautologies. … - George Stigler

I do not conceal my lack of admiration for a pain fully long list of redistributive measures undertaken by modern governments. Many serve no ethically accepted purpose such as compassion for the needy; indeed, they serve only as recognition of which groups possess or lack political influence.

Two main alternative views of the regulation of industry are widely held. The first is that regulation is instituted primarily for the protection and benefit of the public at large or some large subclass of the public. In this view, the regulations which injure the public -as when the oil import quotas increase the cost of petroleum products to America by $5 billion or more a year- are costs of some social goal (here, national defense) or, occasionally, perversions of the regulatory philosophy. the second view is essentially that the political process defies rational explanation: "politics" is an imponderable, a constantly and unpredictably shifting mixture of forces of the most diverse nature, comprehending acts of great moral virtue (the emancipation of slaves) and of the most vulgar venality (the congressman feathering his own nest).

A rational man must be guided by the incentive system within which he operates. No matter what his own personal desires, he must be discouraged from certain activities if they carry penalties and attracted toward others if they carry large rewards. The carrot and the stick guide scientists and politicians as well as donkeys.