Seid, Y., & Gurmu, S. (2015). The role of birth order in child labour and schooling. Applied Economics, 47(49), 5262-5281.
Behrman, J. R., & Taubman, P. (1986). Birth order, schooling, and earnings. Journal of Labor Economics, 4(3, Part 2), S121-S145.
Emerson, P. M., & Souza, A. P. (2008). Birth order, child labor, and school attendance in Brazil. World Development, 36(9), 1647-1664.