degaard1 had suggested that a shared predisposition to migration and to schizophrenia might account for the excess of schizophrenia noted in Norwegian migrants in the United States. However, the finding of increased rates of schizophrenia in Surinamese migrants in the Netherlands, combined with the fact that about half the inhabitants of Surinam migrated to the Netherlands, makes selective migration an unlikely explanation.28 Further, the idea that the process of migration (either selection or stress) could, in isolation, explain the raised rates is undermined by the absence of a clear temporal association with migration and onset5 and by the fact that rates are also elevated in the second generation.