TY - JOUR AU - Lunsford, Kurt G AU - West, Kenneth D TI - Some Evidence on Secular Drivers of U.S. Safe Real Rates JF - National Bureau of Economic Research Working Paper Series VL - No. 25288 PY - 2018 Y2 - November 2018 DO - 10.3386/w25288 UR - http://www.nber.org/papers/w25288 L1 - http://www.nber.org/papers/w25288.pdf N1 - Author contact info: Kurt G. Lunsford Federal Reserve Bank of Cleveland Research Department P.O. Box 6387 Cleveland, OH 44101 Tel: 216-774-2540 E-Mail: kurt.lunsford@clev.frb.org Kenneth D. West Department of Economics University of Wisconsin 1180 Observatory Drive Madison, WI 53706 Tel: 608/262-0033 Fax: 608/262-2033 E-Mail: kdwest@wisc.edu AB - We study long run correlations between safe real interest rates in the U.S. and over 30 variables that have been hypothesized to influence real rates. The list of variables is motivated by an intertermporal IS equation, by models of aggregate savings and investment, and by reduced form studies. We use annual data, mostly from 1890 to 2016. We find that safe real interest rates are correlated as expected with demographic measures. For example, the long run correlation with labor force hours growth is positive, which is consistent with overlapping generations models. For another example, the long run correlation with the proportion of 40 to 64 year-olds in the population is negative. This is consistent with standard theory where middle-aged workers are high-savers who drive down real interest rates. In contrast to standard theory, we do not find productivity to be positively correlated with real rates. Most other variables have a mixed relationship with the real rate, with long run correlations that are statistically or economically large in some samples and by some measures but not in others. ER -