Armando P. Levy Vukina, T., Zheng, X., Marra, M., & Levy, A. (2008). Do farmers value the environment? Evidence from a conservation reserve program auction. INTERNATIONAL JOURNAL OF INDUSTRIAL ORGANIZATION, 26(6), 1323–1332. https://doi.org/10.1016/j.ijindorg.2008.01.001 Levy, A., & Vukina, T. (2004). The league composition effect in tournaments with heterogeneous players: An empirical analysis of broiler contracts. JOURNAL OF LABOR ECONOMICS, 22(2), 353–377. https://doi.org/10.1086/381253 Levy, A., & Vukina, T. (2002). Optimal linear contracts with heterogeneous agents. EUROPEAN REVIEW OF AGRICULTURAL ECONOMICS, 29(2), 205–217. https://doi.org/10.1093/eurrag/29.2.205 Wareham, J., & Levy, A. (2002). Who will be the adopters of 3G mobile computing devices? A probit estimation of mobile telecom diffusion. JOURNAL OF ORGANIZATIONAL COMPUTING AND ELECTRONIC COMMERCE, 12(2), 161–174. https://doi.org/10.1207/S15327744JOCE1202_04