RT Article T1 Transnational entrepreneurs: an alternative form of immigrant economic adaptation JF American sociological review VO 67 IS 2 SP 278 OP 298 A1 Portes, Alejandro A1 Haller, William J. A1 Guarrizo, Luis Eduardo LA English YR 2002 UL https://krimdok.uni-tuebingen.de/Record/1639574875 K1 Soziale Netzwerke K1 Immigration K1 Anpassung K1 Wirtschaft