The purpose of this paper is to analyze the impact of an exogenous shock on fertility - using twin first birth - upon women’s participation in the labor market. The assumption is that, even though the decision of having children is endogenous, twin birth is a random event. Results obtained suggest that unplanned increase in the number of children has a negative effect only on the probability of women’s participation in the labor market. Moreover, this effect seems to be relevant just in the short run.
twin birth; woman labor supply; fertility
