This paper reviews the existing literature on the impact of migrants
networks on the patterns of international migration. It covers the theo-
retical channels at stake in the global effect of the networks. It identifies
the key issues, namely the impact on size, selection and concentration of
the migration flows. The paper also reviews the empirical hurdles that
the researchers face in assessing the importance of networks. The key
issues concern the choice of micro vs a macro approach, the definition of
a network, the access to suitable data and the adoption of econometric
methods accounting for the main features of those data. Finally, the pa-
per reports a set of estimation outcomes reflecting the main findings of
the macro approach.
networks on the patterns of international migration. It covers the theo-
retical channels at stake in the global effect of the networks. It identifies
the key issues, namely the impact on size, selection and concentration of
the migration flows. The paper also reviews the empirical hurdles that
the researchers face in assessing the importance of networks. The key
issues concern the choice of micro vs a macro approach, the definition of
a network, the access to suitable data and the adoption of econometric
methods accounting for the main features of those data. Finally, the pa-
per reports a set of estimation outcomes reflecting the main findings of
the macro approach.
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