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Based on the observation of regular “epidemic” recurrence of activity in the history of symbolic logic, a new wave of logic activity was predicted byGoffman in 1971 for the coming years. This prediction is examined and confirmed to some extent. It is shown, however, that the whole mathematics came in a wave-like fashion in the last 200 years, that the main fluctuations of logic were isochronic with the main fluctuations of mathematics, and, in addition, that fundamental logic contributions appeared on the top of the waves. After considering some problems of time-series analysis, relationships to business cycles of the Kondratiev, Kuznets, and Juglar types are discussed.

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and its three determinants—RTA MIT , RPP MIT , and PS MIT . Hence, the results support H 4 . In addition, this study further investigates the business cycle of the American pharmaceutical industry in Table 2 . Because the coefficients of Year 2001

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strategies, business cycles, and economic performance . Strategic Management Journal 9 : 99 – 110 10.1002/smj.4250090202 . Arthur , WB 2007 The structure of invention . Research

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.05.013 . Schumpeter , JA 1934 The theory of economic development: an inquiry into profits, capital, credit, interest, and the business cycle Harvard University Press Cambridge

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