Article dans une revue à comité de lecture :

Alice Mesnard et Paul Seabright, « Escaping Epidemics Through Migration? Quarantine Measures under Asymmetric Information about Infection Risk », Journal of Public Economics, vol. 93, n°7-8, août 2009, p. 931-938. doi:10.1016/j.jpubeco.2009.05.001.
[ ScienceDirect© ]


This paper explores the implications for public policy of the fact that individuals have incomplete but private information about their exposure to infectious disease when they make migration decisions. In a 2-period model we study conditions under which the presence of quarantine measures may lead to inefficient outcomes by strengthening individuals' interest in migration to escape centres of disease and thereby imposing negative externalities on other uninfected individuals. We show first that when the disease has an epicentre, the marginal migrant imposes a net negative externality. Secondly, quarantine policies may sometimes encourage migration instead of discouraging it. Thirdly, even when they succeed in discouraging migration, quarantine policies may lower social welfare, and even increase overall disease incidence, if they go too far, thereby discouraging those intra-marginal migrants for whom private benefits exceed private costs by more than the negative externality they impose on others.

Thème de recherche TSE

Économie publique, santé, travail et éducation

Codes JEL

I18 : Government Policy; Regulation; Public Health
O15 : Human Resources; Income Distribution; Migration
O19 : International Linkages to Development; Role of International Organizations
R23 : Regional Migration; Regional Labor Markets; Population

Thèmes de recherche IAST

Individuals and Social Networks

Discipline IAST