Thomas Sampson

Centre for Economic Performance
London School of Economics
Houghton Street
London, WC2A 2AE
United Kingdom

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Institutional Affiliation: London School of Economics

NBER Working Papers and Publications

April 2020Endogenous Education and Long-Run Factor Shares
with Gene M. Grossman, Elhanan Helpman, Ezra Oberfield: w27031
We study the determinants of factor shares in a neoclassical environment with capital- skill complementarity and endogenous education. When more physical capital raises the marginal product of skills relative to that of raw labor, an increase in a broad measure of embodied human capital raises the capital share in national income for any given rental rate. When education is chosen optimally, a dynamic equilibrium is characterized by an inverse relationship between the level of human capital and both the rental rate on capital and the difference between the interest rate and the growth rate of wages. As a consequence, estimates of the elasticity of substitution that fail to account for levels of human capital will be biased upward. We develop a model with overlapping generations, ongoing in...
September 2017The Productivity Slowdown and the Declining Labor Share: A Neoclassical Exploration
with Gene M. Grossman, Elhanan Helpman, Ezra Oberfield: w23853
We explore the possibility that a global productivity slowdown is responsible for the widespread decline in the labor share of national income. In a neoclassical growth model with endogenous human capital accumulation a la Ben Porath (1967) and capital-skill complementarity a la Grossman et al. (2017), the steady-state labor share is positively correlated with the rates of capital-augmenting and labor-augmenting technological progress. We calibrate the key parameters describing the balanced growth path to U.S. data for the early postwar period and find that a one percentage point slowdown in the growth rate of per capita income can account for between one half and all of the observed decline in the U.S. labor share.
January 2016Balanced Growth Despite Uzawa
with Gene M. Grossman, Elhanan Helpman, Ezra Oberfield: w21861
The evidence for the United States points to balanced growth despite falling investment-good prices and an elasticity of substitution between capital and labor less than one. This is inconsistent with the Uzawa Growth Theorem. We extend Uzawa's theorem to show that the introduction of human capital accumulation in the standard way does not resolve the puzzle. However, balanced growth is possible if schooling is endogenous and capital is more complementary with schooling than with raw labor. We describe balanced growth paths for a variety of neoclassical growth models with capital-augmenting technological progress and endogenous schooling. The balanced growth path in an overlapping-generations model in which individuals choose the duration of their education matches key features of the U.S....

Published: Gene M. Grossman & Elhanan Helpman & Ezra Oberfield & Thomas Sampson, 2017. "Balanced Growth Despite Uzawa," American Economic Review, American Economic Association, vol. 107(4), pages 1293-1312, April. citation courtesy of

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