Both geographical (i.e. contiguity) and cultural (i.e. common language) proximity have the expected positive sign, since migrants tend to move in countries that are closer to their homes and where they can easily communicate. Women's years of education has a significant effect confirming that being educated increases the probability to migrate.15 Unemployment rates in origin and destination countries are statistically significant suggesting that differentials in job opportunities matters.16 It is worthy to note the significance of the exclusion variable in the Heckman procedure, namely diplomatic exchange. The positive sign indicates that the presence of a diplomatic representation in a foreign country is often seen as prerequisite for engaging in legal cross-border migration: the probability of having female migrants increases by 26% in presence of diplomatic exchange. Male migration flows in 2010 are positively correlated with female flows.