The effect of financial development on economic growth: a meta-analysis

In this article, we contribute to the current debate on the sign and size of the finance–growth relation. To this purpose, we use a meta-analysis with 551 estimates from 68 empirical studies that take private credit to GDP as a measure for financial development. We distinguish between linear and logarithmic specifications. First, we find evidence of significantly positive publication bias in both the linear and log-linear specifications. It suggests the literature has exaggerated the size of the finance–growth effect in the past. Second, we find suggestive evidence that the logarithmic specification is superior to the linear specification. In the logarithmic specification when accounting for publication bias, a 10% increase in credit to the private sector increases economic growth with 0.09 percentage points. For the linear estimates, no significant effect of credit to the private sector on economic growth is found on average. Overall, the evidence points to a positive but decreasing effect of financial development on growth and supports the ‘too much’ finance hypothesis.