This paper analyses the determinants of internal migration in Spain
between 1995 and 2002. After a brief descriptive study, we present an analytical
model of internal migration flows. Subsequently, we estimate this model by
applying semiparametric techniques. The general conclusion that we come to is
that net migration rates are influenced mainly by income and climatic condition
differentials between the regions of origin and destination; in addition,
unemployment and housing price differentials seem to have a much weaker effect
while variables such as aggregate unemployment, on the one hand, and human
capital and population density differentials, on the other, do not affect net
migration rates