TY - JOUR AU - Romer,Christina D. TI - Changes in the Cyclical Behavior of Individual Production Series JF - National Bureau of Economic Research Working Paper Series VL - No. 2440 PY - 1987 Y2 - November 1987 UR - http://www.nber.org/papers/w2440 L1 - http://www.nber.org/papers/w2440.pdf N1 - Author contact info: Christina D. Romer Department of Economics University of California, Berkeley 549 Evans Hall, #3880 Berkeley, CA 94720 Tel: 510/642-4317 Fax: 510/642-6615 E-Mail: cromer@econ.berkeley.edu AB - This paper uses simple time series techniques to analyze changes in the short-run behavior of 38 physical production series for 1889-1984. The main finding is that fluctuations in these output series in the periods 1889-1914 and 1947-1984 are very similar, while those in the period 1922- 1939 are anomalous. Relative to the prewar era, the postwar era exhibits only a slight damping of fluctuations and no increase in the persistence of short-run movements. At the same time, the correlation between the growth rates of the 38 goods is very low in both the prewar and postwar eras and has declined slightly over time. ER -