Johan Henrik Åkerman
Johan Henrik Åkerman (31 March 1896 in Stockholm – July 12, 1982) was a Swedish economist and was a Professor of Economics and Statistics at Lund University.He was the younger brother to Swedish economist Johan Gustav Åkerman. He got an MBA at Stockholm School of Economics 1918. He then studied at Harvard University 1919-1920, and again in Sweden, he studied among other statistics in the Universities in Uppsala and Lund. He became PhD in 1929 with the thesis about the economic life rhythm which was the first Swedish dissertation that contained elements of econometrics. "Åkerman's  dissertation,on Rhythmics of Economic Life, announced his life-long interest in business cycle theory .There was, in his view, a strict synchronization between short and long cycles. Åkerman's attempts to formulate a theory would involve incorporating a prescient concern with an endogenous business cycle theory reliant in part upon seasonal cycles which, he argued, were correlated with and could propagate large and longer economic swings. Åkerman's "causal association" (1931) theory is a precedent to very recent work on seasonal cycles. Åkerman was also the first to identify the "political business cycle" (1947).Åkerman also pursued more expansive work  In his two monumental volumes on economic theory (1939, 1944), he attempts a sweeping theory of historical and structural change and how that, in turn, determines specific economic phenomena. This made him quite critical of the pure theory and the cavalier aggregation methods".