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Positive economics (as opposed to normative economics) is the branch of economics that concerns the description and explanation of economic phenomena.〔Stanley Wong (1987). “positive economics," The New Palgrave: A Dictionary of Economics, v. 3, pp. 920-21〕 It focuses on facts and cause-and-effect behavioral relationships and includes the development and testing of economics theories.〔Richard G. Lipsey (2008). "positive economics." The New Palgrave Dictionary of Economics''. Second Edition. (Abstract. )〕 Earlier terms were value-free economics and its German counterpart wertfrei economics. Positive economics as science, concerns analysis of economic behavior.〔Lionel Robbins (1932). ''An Essay on the Nature and Significance of Economic Science''.〕 A standard theoretical statement of positive economics as operationally meaningful theorems is in Paul Samuelson's ''Foundations of Economic Analysis'' (1947). Positive economics as such avoids economic value judgements. For example, a positive economic theory might describe how money supply growth affects inflation, but it does not provide any instruction on what policy ''ought to'' be followed. Still, positive economics is commonly deemed necessary for the ranking of economic policies or outcomes as to acceptability,〔 which is normative economics. Positive economics is sometimes defined as the economics of "what is", whereas normative economics discusses "what ought to be". The distinction was exposited by John Neville Keynes (1891)〔John Neville Keynes (1891). (''The Scope and Method of Political Economy'' )〕 and elaborated by Milton Friedman in an influential 1953 essay.〔Milton Friedman (1953). "The Methodology of Positive Economics," ''Essays in Positive Economics''.〕 The methodological basis for a positive/normative distinction has its roots in the fact-value distinction in philosophy, the principal proponents of such distinctions being David Hume and G. E. Moore. The logical basis of such a relation as a dichotomy has been disputed in the philosophical literature. Such debates are reflected in discussion of positive science and specifically in economics, where critics, such as Gunnar Myrdal (1954), and proponents of Feminist Economics such as Julie A. Nelson, Geoff Schneider and Jean Shackelford , and Diana Strassmann, dispute the idea that economics can be completely neutral and agenda-free. Positive economics concerns ''what is''. To illustrate, an example of a positive economic statement is as follows: "The unemployment rate in France is higher than that in the United States." == See also == * Consumer theory * Economic methodology * Distribution (economics) * Normative economics * Philosophy of economics * Production possibilities frontier * Supply and demand * Feminist Economics 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Positive economics」の詳細全文を読む スポンサード リンク
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