Several studies, most of them employing straightforward regression analysis, have concluded that immigrants' proficiency in the language of their adopted country is correlated with their productivity, as measured by earnings. Two weaknesses of these studies are potential unobserved...

We compare the earnings of monolingual and competent bilingual immigrants in Germany. A joint discussion of language skills as human capital or social capital and theories of ethnic marginalisation leads us to expect heterogeneous returns to bilingualism. To track this potential divergence, we...

Bilingualism is a widespread phenomenon, yet its economic effects are under researched. Typically studies find that bilingual workers are disadvantaged. Governments often protect minority languages through official promotion of bilingualism, with potential economic consequences. This paper...