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Résumé
IN HIS admirable book on The Scope and Method of Political Economy John Neville Keynes distinguishes among "a positive science . . . [,] a body of systematized knowledge concerning what is; a normative or regulative science . . . [,] a body of systematized knowledge discussing criteria of what ought to be . . . ; an art . . . [,] a system of rules for the attainment of a given end"; comments that "confusion between them is common and has been the source of many mischievous errors"; and urges the importance of "recognizing a distinct positive science of political economy."
