Modeling the Immigration Shock

We are interested in the following question: what are the intergenerational effects of a large and unexpected immigration flow? How does it affect the welfare of the different generations living in the country that receives the immigration flow and, in particular, how does it impact on intergenerational arrangements such as public education and pensions? To begin answering these questions we develop a simple theoretical framework with overlapping generations that live for three periods, accumulate human capital in the first, work in the second and retire in the third living off the return from their investments. The latter include both physical capital and the interest from the money they lent to the young people to invest in human capital.