Standard country-level estimates of economic growth could obscure or miss the
impacts of many aid projects experienced by a subset of regions or communities
within a country. One way to examine whether the focus on country- rather than
regional-level outcomes also explains the absence of robust effects of aid on
growth in the empirical literature is to analyze aid effectiveness at the sub-national
level. Using project-level data on World Bank aid in 130 countries during 2000-11,
the study finds no evidence that this aid causes regional growth as measured by
growth in nighttime light intensity.