FEEM working papers "Note di lavoro" series
2005 .108

Migration Dynamics


Autori: Sergio Vergalli, Michele Moretto
Serie: Economy and Society
Editor: Gianmarco I.P. Ottaviano
Tipo: Journal
Parole chiave: Migration,Real Option,Labour Market,Network Effect
Numero JEL: F22,O15,R23
JEL: Journal of Economics
Pagine: Vol. 93, No. 3, pp. 223-265
Data: 2008

Abstract

This paper tries to explain why most migration flows show some observable jumps in their processes, a phenomenon that seems to be sympathetic with the characteristic of irreversibility of migration. We present a real option model where the choice to migrate depends on both the differential wage between the host country and the country of origin, and on the probability of being fully integrated into the host country. The theoretical results show that the optimal migration decision of a single individual consists of waiting before migrating in a (coordinate) mass of individuals. The dimension of the migration flow depends on the behavioural characteristics of the ethnic groups: the more "sociable" they are, the larger the size of the wave and the lower the differential wage required. A second part of the paper is devoted to calibrating the model and simulating some migration flows to Italy in the last decade. The calibration is able to replicate the observable migration jumps in the short term. In particular, the calibrated model is able to conjecture the induced labour demand elasticity level of the host country and the behavioural rationale of the migrants.

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