Income differences across countries primarily reflect differences in total factor productivity (TFP). More disaggregated data show that the TFP gap between rich and poor countries varies systematically across industrial sectors of the economy: Poor countries are particularly unproductive in tradable and investment goods sectors. In this paper, we develop a quantitatively-oriented framework to explain such cross-country patterns in aggregate and sectoral TFP. We start by documenting that an important distinction between sectors is their average establishment size. For example, establishments in tradable and investment goods sectors operate at much larger scales than those in the non-tradable sector. In our model, sectors with larger scales of operation have more financing needs, and are hence disproportionately affected by financial frictions. Our quantitative exercises show that financial frictions account for a substantial part of the observed cross-country patterns in TFP, both at the aggregate and at the sectoral level. Our model also has novel implications for the impact of financial frictions on the relative scale between the tradable and the non-tradable sectors, which are shown to be consistent with the data.

The authors gratefully acknowledge the support of the National Science Foundation under grant number SES-0820318. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research. NBER working papers are circulated for discussion and comment purposes. They have not been peerreviewed or been subject to the review by the NBER Board of Directors that accompanies official NBER publications.

Income differences across countries primarily reflect differences in total factor productivity (TFP). More disaggregate data suggest that the TFP gap between rich and poor countries varies systematically across industrial sectors of the economy. For example, less developed countries seem particularly unproductive in manufacturing. We develop a quantitative framework to explain the relationship between aggregate/sectorlevel TFP and financial development across countries. Financial frictions distort the allocation of capital and talent across production units, adversely affecting measured productivity. In our model, sectors with larger scales of operation (e.g., manufacturing) have more financing needs, and are hence disproportionately vulnerable to financial frictions. Our quantitative analysis shows that financial frictions account for a substantial part of the observed cross-country differences in output per worker, aggregate TFP, sector-level relative productivity, and capital to output ratios.

The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research. NBER working papers are circulated for discussion and comment purposes. They have not been peer-reviewed or been subject to the review by the NBER Board of Directors that accompanies official NBER publications.