International migration, non-traded goods and economic welfare in the source country: a comment

"Labor emigration redistributes income in a two factor, two good economy where one good is internationally non-traded. Labor's nominal wage rises as nominal capital payments fall. Recent research has shown that the prices of non-traded goods rise, causing society's welfare to decline. Here the induced change in the real income of each factor is considered separately. There is an ambiguity with regard to the real income of non-emigrating labor. If labor spends a relatively small fraction of income on the non-traded goods, its real income may rise, even though society suffers the loss of welfare."