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Welfare economics is a field of economics that applies microeconomic techniques to evaluate the overall well-being (welfare) of a society. [ 1 ] The principles of welfare economics are often used to inform public economics , which focuses on the ways in which government intervention can improve social welfare .
There are two fundamental theorems of welfare economics. The first states that in economic equilibrium , a set of complete markets , with complete information , and in perfect competition , will be Pareto optimal (in the sense that no further exchange would make one person better off without making another worse off).
Abram Bergson (Burk),"A Reformulation of Certain Aspects of Welfare Economics," Quarterly Journal of Economics, 52(2), February 1938, 310–34; Bergson–Samuelson social welfare functions in Paretian welfare economics from the New School. James E. Foster and Amartya Sen, 1996, On Economic Inequality, expanded edition with annexe, ISBN 0-19 ...
Welfare economics is a branch of economics that uses microeconomic techniques to evaluate well-being (welfare) at the aggregate (economy-wide) level. A typical methodology begins with the derivation (or assumption) of a social welfare function, which can then be used to rank economically feasible allocations of resources in terms of the social welfare they entail.
Social choice theory is a branch of welfare economics that extends the theory of rational choice to collective decision-making. [1] Social choice studies the behavior of different mathematical procedures (social welfare functions) used to combine individual preferences into a coherent whole.
In mainstream economics, economic surplus, also known as total welfare or total social welfare or Marshallian surplus (after Alfred Marshall), is either of two related quantities: Consumer surplus , or consumers' surplus , is the monetary gain obtained by consumers because they are able to purchase a product for a price that is less than the ...
Public interest theory is a part of welfare economics. It emphasizes that regulation should maximize social welfare and that regulation should follow a cost/benefit analysis to determine whether the increased social welfare outweighs the regulatory cost. The following costs can be distinguished: [citation needed] Formulation and implementation ...
In welfare economics, the compensation principle refers to a decision rule used to select between pairs of alternative feasible social states. One of these states is the hypothetical point of departure ("the original state").