Does Financial Development Reduce Carbon Intensity? Evidence of a Weak Nexus in OECD Economies, 2005–2021

Abstract

The belief that financial development funds the green transition underpins major climate-policy initiatives, yet the empirical literature reports mixed evidence on the financial development–emissions relationship. This study tests whether financial development systematically reduces carbon intensity in the setting where the hypothesis should hold most strongly. Using a balanced panel of 37 OECD economies over 2005–2021, it combines a multidimensional financial development index with a battery of dependence-robust estimators, including Driscoll-Kraay fixed effects, Common Correlated Effects Mean Group estimation, a Hansen panel threshold model, and Dumitrescu-Hurlin causality testing. Results indicate that financial development exerts no systematic effect on carbon intensity. The null survives linear, heterogeneous, threshold, and per-capita robustness specifications. Carbon intensity is instead governed by energy composition: a higher share of renewables robustly lowers it, and energy intensity robustly raises it. The finding suggests that aggregate financial deepening does not decarbonize mature economies and redirects attention to energy-system levers and targeted green finance instruments.