Are lower interest rates really associated with higher growth? New empirical evidence on the interest rate thesis from 19 countries

Kang‐Soek Lee and Richard A. Werner

International Journal of Finance & Economics, 2023, vol. 28, issue 4, 3960-3975

Abstract: There is a substantial literature on the link between finance and growth. Empirical evidence remains inconclusive and the debate continues. In this paper, we adopt the research strategy of focusing on a narrower underlying issue that remains at the core of most macroeconomic theories, namely the interest rate thesis (that lower rates result in higher growth and vice versa). If there are problems with this relationship, this could explain the lack of consensus on the finance‐growth nexus. The question is also of practical relevance: Central banks have been focusing on interest rate policy on the assumption that the interest rate thesis holds. There are theoretical reasons why this may not be the case. We conduct an analysis of time‐varying dynamic conditional correlation in a GARCH model and of the direction of statistical causation between nominal interest rates and real economic activity in 19 industrialized and emerging economies. We find evidence that interest rates are not negatively correlated with economic growth and do not cause growth. Instead, we find evidence that the relationship may be the opposite in both dimensions. This adds to recent doubts about the prevailing conduct of monetary policy and common theoretical models. Specifically, lowering interest rates may be counter‐productive when trying to stimulate the economy.

Date: 2023
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