J. M. Agüero and M. S. Marks, Motherhood and Female Labor Supply in the Developing World: Evidence from Infertility Shocks, Journal of Human Resources, vol.46, issue.4, pp.800-826, 2011.
DOI : 10.1353/jhr.2011.0002

J. Angrist and W. Evans, Children and their parent's labor supply: evidence from exogenous variation in family size, American Economic Review, vol.88, issue.3, pp.450-477, 1998.

F. Arnold and L. Zhaoxiang, Sex Preference, Fertility, and Family Planning in China, Population and Development Review, vol.12, issue.2, pp.221-246, 1986.
DOI : 10.2307/1973109

G. S. Becker and H. G. Lewis, On the Interaction between the Quantity and Quality of Children, Journal of Political Economy, vol.81, issue.2, Part 2, pp.279-288, 1973.
DOI : 10.1086/260166

G. S. Becker and N. Tomes, Child Endowments and the Quantity and Quality of Children, Journal of Political Economy, vol.84, issue.4, Part 2, pp.143-162, 1976.
DOI : 10.1086/260536

G. Becker, Human Capital, Effort, and the Sexual Division of Labor, Journal of Labor Economics, vol.3, issue.1, Part 2, pp.33-58, 1985.
DOI : 10.1086/298075

D. M. Blau and P. K. Robins, Child-Care Costs and Family Labor Supply, The Review of Economics and Statistics, vol.70, issue.3, pp.374-381, 1988.
DOI : 10.2307/1926774

D. E. Bloom, D. Canning, G. Fink, and J. E. Finlay, Fertility, female labor force participation, and the demographic dividend, Journal of Economic Growth, vol.110, issue.3, pp.79-101, 2009.
DOI : 10.1007/s10887-009-9039-9

N. Blunch, S. Canagarajah, and D. Raju, The Informal Sector Revisited: A Synthesis Across Space and Time " . Social Protection Discussion Paper Series, 2001.

J. Bound, D. Jaeger, and R. Baker, Problems with Instrumental Variables Estimation when the Correlation between the Instruments and the Endogenous Explanatory Variable is Weak, Journal of the American Statistical Association, vol.82, issue.430, pp.90-443, 1995.
DOI : 10.1080/01621459.1995.10476536

S. Bronars and J. Grogger, The Economic Consequences of Unwed Motherhood: Using Twin Births as a Natural Experiment, American Economic Review, vol.84, issue.5, pp.1141-56, 1994.

M. Browning, Children and household economic behavior, Journal of Economic Literature, vol.30, issue.3, pp.1434-75, 1992.

G. Cain and M. Dooley, Estimation of a Model of Labor Supply, Fertility, and Wages of Married Women, Journal of Political Economy, vol.84, issue.4, Part 2, pp.179-99, 1976.
DOI : 10.1086/260538

H. Chun and J. Oh, An instrumental variable estimate of the effect of fertility on the labour force participation of married women, Applied Economics Letters, vol.88, issue.10, pp.631-634, 2002.
DOI : 10.2307/1912026

M. T. Coleman and J. Pencavel, Trends in Market Work Behavior of Women since 1940, ILR Review, vol.3, issue.1, pp.653-676, 1940.
DOI : 10.1177/001979399304600405

R. Conelly, The Effect of Child Care Costs on Married Women's Labor Force Participation, The Review of Economics and Statistics, vol.74, issue.1, pp.83-90, 1992.
DOI : 10.2307/2109545

E. Danaj, Family in Albania as a primary solidarity network " . in " Legacy and Change: Albanian transformation from multidisciplinary perspectives, 2014.

A. Ebenstein, When is the Local Average Treatment Close to the Average?: Evidence from Fertility and Labor Supply, Journal of Human Resources, vol.44, issue.4, pp.955-975, 2009.
DOI : 10.1353/jhr.2009.0005

W. Even, Career Interruptions Following Childbirth, Journal of Labor Economics, vol.5, issue.2, pp.255-277, 1987.
DOI : 10.1086/298147

. Fleisher, G. Belton, and . Rhodes, Fertility, Womens Wage Rate and Labor Supply, American Economic Review, vol.69, issue.1, pp.14-24, 1979.

J. B. Gelbach, Public Schooling for Young Children and Maternal Labor Supply, American Economic Review, vol.92, issue.1, pp.307-322, 2002.
DOI : 10.1257/000282802760015748

. Gjonça, . Arjan, . Aassve, . Arnstein, and L. Mencarini, Albania: Trends and patterns, proximate determinants and policies of fertility change, Demographic Research, vol.19, issue.11, pp.261-292, 2008.
DOI : 10.4054/DemRes.2008.19.11

C. Goldin and S. Polachek, Residual Differences by Sex: Perspectives on the Gender Gap Earnings, American Economic Review, vol.77, issue.2, pp.143-51, 1987.

X. Gong and A. Van-soest, Family structure and female labour supply in Mexico city, Journal of Human Resources, vol.37, issue.1, pp.146-157, 2002.

R. Gronau, The Intrafamily Allocation of Time: The Value of the Housewives' Time, American Economic Review, vol.63, pp.634-51, 1973.

R. Gronau, Sex-Related Wage Differentials and Womens Interrupted Careers the Chicken or the Egg, American Economic Review, vol.6, issue.3, pp.277-301, 1973.

J. Heckman, Shadow Prices, Market Wages, and Labor Supply, Econometrica, vol.42, issue.4, pp.679-94, 1974.
DOI : 10.2307/1913937

J. Heckman and R. Willis, A Beta-logistic Model for the Analysis of Sequential Labor Force Participation by Married Women, Journal of Political Economy, vol.85, issue.1, pp.27-58, 1977.
DOI : 10.1086/260544

J. Jacobsen, J. W. Pearce, I. , and J. Rosenbloom, The Effects of Childbearing on Married Women's Labor Supply and Earnings: Using Twin Births as a Natural Experiment, The Journal of Human Resources, vol.34, issue.3, pp.449-74, 1999.
DOI : 10.2307/146376

M. Killingsworth and J. Heckman, Female Labor Supply: A Survey, Handbook of Labor Economics, 1986.

J. Kimmel, Child Care Costs as a Barrier to Employment for Single and Married Mothers, Review of Economics and Statistics, vol.8, issue.2, pp.287-299, 1998.
DOI : 10.1111/j.1540-4560.1991.tb00286.x

J. A. Klerman, U.S. Abortion Policy and Fertility, American Economic Review, vol.89, issue.2, pp.261-264, 1999.
DOI : 10.1257/aer.89.2.261

S. Korenman and D. Neumark, Marriage, Motherhood, and Wages, The Journal of Human Resources, vol.27, issue.2, pp.233-255, 1992.
DOI : 10.2307/145734

K. Popullor, The Constitution of the Socialist Republic of Albania, Article, vol.14, pp.28-41, 1976.

D. Lee, Fertility and Female Labor Supply in Rural China Working Paper [39] Lehrer The Impact of Children on Married Womens Labor Supply: Black- White Differentials Revisited, Journal of Human Resources, vol.27, issue.3, pp.422-444, 1992.

S. Lundberg and E. Rose, Parenthood and the earnings of married men and women, Labour Economics, vol.7, issue.6, pp.689-710, 2000.
DOI : 10.1016/S0927-5371(00)00020-8

M. Kristin and C. Paxson, Women's Work and Economic Development, The Journal of Economic Perspectives, vol.14, issue.4, pp.141-164, 2000.

D. L. Millimet, The Impact of Children on Wages, Job Tenure, and the Division of Household Labour, The Economic Journal, vol.110, issue.462, pp.139-57, 2000.
DOI : 10.1111/1468-0297.00526

A. Nakamura and M. Nakamura, The econometrics of female labor supply and children, Econometric Reviews, vol.17, issue.1, pp.1-71, 1992.
DOI : 10.1086/208965

M. Porter and E. M. King, Fertility and Women's Labor Force Participation in Developing Countries, 2010.

J. Posadas and M. Vidal-fernandez, Grandparents' Child Care and Female Labor Force Participation, Working Paper, vol.6398, 2012.

. Priebe, Child Costs and the Causal Effect of Fertility on Female Labor Supply: An investigation for Indonesia 1993-2008 " . Courant Research Centre: Poverty, Equity and Growth, Discussion Papers, 2010.

M. R. Rosenzweig and K. I. Wolpin, Life-Cycle Labor Supply and Fertility: Causal Inferences from Household Models, Journal of Political Economy, vol.88, issue.2, pp.328-348, 1980.
DOI : 10.1086/260868

M. R. Rosenzweig and K. I. Wolpin, Natural ???Natural Experiments??? in Economics, Journal of Economic Literature, vol.38, issue.4, pp.827-874, 2000.
DOI : 10.1257/jel.38.4.827

M. Sasaki, The Causal Effect of Family Structure on Labor Force Participation among Japanese Married Women, The Journal of Human Resources, vol.37, issue.2, pp.429-440, 2002.
DOI : 10.2307/3069654

T. Schultz and . Paul, The Influence of Fertility on Labor Supply of Married Women: Simultaneous Equation Estimates, pp.273-351, 1978.

T. Schultz and . Paul, How does family planning promote development? evidence from a social experiment in Matlab, 1977.

F. Tarifa, Disappearing from Politics: Social Change and Women in Albania " . Women in the Politics of Post-communist Eastern Europe, 1996.

R. Wong and R. E. Levine, The Effect of Household Structure on Women's Economic Activity and Fertility: Evidence from Recent Mothers in Urban Mexico, Economic Development and Cultural Change, pp.41-89, 1992.
DOI : 10.1086/451997

J. Wooldridge, Chapter 15: Instrumental Variables Estimation and Two-stage Least Squares " . In: Introductory Econometrics, A Modern Approach, 2003.

W. Bank, World Development Report 2012: Gender Equality and Development, 2011.

R. Zickel and R. W. Iwaskiw, Albania Country Study " . Second edition, Headquarters , Department of the Army, Library of Congress, US Figure 3: Pre-school in Albania, 1990.

B. Panel, Only LSMS databases Hours per week (total) 15