Nobel laureate economist Milton Friedman once noted that free immigration cannot coexist with a welfare state. A welfare state with open borders might turn into a haven for poor immigrants, which would place such a fiscal burden on the state that native-born voters would support less-generous...

From Malthus to Becker, the economic approach to population growth and its interactions with the surrounding economic environment has undergone a major transformation. Population Economics elucidates the theory behind this shift and the consequences for economic policy. Razin and Sadka...