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This paper examines the determinants of migration decision with a special emphasis on the role of income differences. As migrants are not a random part of the population, the migration equation is corrected for selectivity bias using the Heckman procedure. The data for this study is collected under a Common Sampling Frame approach, which resulted in a wide variety of data sets. Empirical results show the statistically significant effects of income differentials on households' decisions to participate in migration. This result lends credence to the significance of economic incentives on the intra-household migration decision making process. Additionally, factors like migration experience, household size, education, social capital, ethnic networks, off-farm activities, and irrigation also explain migration decisions. Cet article �tudie les d�terminants de la d�cision de migration avec un accent particulier mis sur le r�le des �carts de revenues. Le choix des migrants n'�tant pas d� au hasard, le biais de s�lectivit� de l'�quation de migration a �t� corrig� par la proc�dure de Heckman. Les donn�es de cette �tude ont �t� collect�es selon une approche de cadre d'�chantillonnage commun (Common Sampling Frame) qui fournit une grande vari�t� de s�ries de donn�es. Les r�sultats empiriques montrent des impacts statistiquement significatifs des �carts de revenus sur les d�cisions de m�nages de participer aux migrations. Ils donnent du cr�dit aux incitations �conomiques face au processus de prise de d�cision des m�nages. De plus, des facteurs tels des exp�riences de migrations ant�rieures, la taille des m�nages, l'�ducation, le capital social, les r�seaux ethniques, les activit�s non agricoles et l'irrigation expliquent �galement les d�cisions migratoires.

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Droughts hit the most vulnerable people the hardest. When this happens, everybody in the economy loses over the medium- to long-term. Proactive policies and planning based on vulnerability and risk assessments can reduce drought risk before the worst impacts occur. The aim of this article is to inform a global initiative, led by the United Nations Convention to Combat Desertification (UNCCD), to mitigate the effects of drought on vulnerable ecosystems and communities. This is approached through a rapid review of experiences from selected nations and of the available literature documenting methodological approaches to assess drought impacts and vulnerability at the local level. The review finds that members of the most vulnerable communities can integrate available methods to assess drought risks to their land and ecosystem productivity, their livelihoods and their life-supporting hydrological systems. This integration of approaches helps to ensure inclusive assessments across communities and ecosystems. However, global economic assessments often still fail to connect to holistic consideration of vulnerability at a local scale. As a result, they routinely fall short of capturing the systemic effects of land and water management decisions that deepen vulnerability to droughts over time. To ensure proactive and inclusive drought risk mitigation, multiscale, systemic approaches to drought vulnerability and risk assessment can be further reinforced at a global level.