285 страниц. 2008 год. An investigation of the methodological and epistemological foundations of macroeconomic theory. The author compares the two main alternative research programmes in macroeconomics: that outlined by Keynes in his 'General Theory', and that suggested by Lucas, the leader of the new classical economists. He concludes that a Keynesian conception of macroeconomics as a discipline autonomous from microeconomics and open to theoretical and methodological innovation should be defended.