RT Journal Article T1 Endogenous hours and the wealth of entrepreneurs A1 Wellschmied, Félix A1 Yurdagul, Emircan AB US entrepreneurs typically work long hours in their firms and these hours form a large part of the firms' labor input. This paper studies the role of endogenous owner hours in shaping the wealth distribution among entrepreneurs. We introduce owners' endogenous labor supply into a model of entrepreneurial choice and financial frictions. The model fits well the levels and the dispersion of wealth among entrepreneurs. Long owner hours incentivize poor, highly productive individuals to be owners and help the most productive owners to accumulate large quantities of wealth. On net, owners working long hours decreases the median owner wealth and increase wealth dispersion among owners. Differently, the ability to work sufficiently short hours incentivizes owners to run low productivity firms with high wealth to income ratios. Finally, alternative calibrations ignoring the endogenous labor supply of owners lead to owners that are much richer than in the data and overstate the effect of financial frictions in the economy. PB Elsevier SN 1094-2025 YR 2021 FD 2021-01-01 LK https://hdl.handle.net/10016/34488 UL https://hdl.handle.net/10016/34488 LA eng NO We thank the KauffmanFoundation and the NORC Data Enclave for providing research support and access to the data used in this research.We also gratefully acknowledge the support from the Ministerio de Econom`ıa y Competitividad (Spain) (grant numbersECO2014-56384-P and ECO2015-68615-P), Mar`ıa de Maeztu grant (MDM 2014-0431), and from Comunidad de Madrid,MadEco-CM (S2015/HUM-3444). DS e-Archivo RD 27 jul. 2024