Fertility Rates and Skill Distribution in Razin and Sadka's Migration-Pension Model: A Note

Razin and Sadka (1999) show that unskilled immigration is
beneficial to all income and all age groups in society, even if
immigrants are net beneficiaries of the welfare system. Among other
things, this result rests on the assumptions that immigrants have
the same reproduction rate as the native population and that the
immigrants' offspring has the same distribution of skills as the
natives' offspring. By relaxing these assumptions, we show that the
Razin and Sadka result is no longer unambiguous.