This paper examines whether financial development facilitates economic
growth by scrutinizing one rationale for such a relationship: that fi
nancial development reduces the costs of external finance to firms. Sp
ecifically, we ask whether industrial sectors that are relatively more
in need of external finance develop disproportionately faster in coun
tries with more-developed financial markets. We find this to be true i
n a large sample of countries over the 1980's. We show this result is
unlikely to be driven by omitted variables, outliers, or reverse causa
lity.