ABSTRACT
This chapter is concerned with the issue of immigrant/ethnic concentrations, that is, the tendency of immigrants to concentrate geographically by ethnicity or country of origin within the host country.1 In particular, it is concerned with the consequences of enclaves or concentrations for two characteristics of immigrant adjustment-destination language proficiency and labor market earnings. Other aspects of immigrant life influenced by concentrations, including political participation and influence, are beyond the scope of this chapter.
