The slow construction of global databases. A presentation of orders of magnitude. " Corridors " migration versus " dispersion " migrants. Why does the reality of migratory flows escape the mechanical models of mobility (overflow of demographic overflow, outlet for the " misery of the world ", attraction for El Dorado) ?
A look back at African migration to Europe, its driving forces and its future. A brief history of attempts to quantify and project African migration since independence. From the 1960s to the present day, the recurring theme of the " rush" of Africans to Europe. Are they different from other migratory flows ? Are they " de trop " ?
Can demographic migration projections tell the future ? Structural inertia and the emergence of new migration trends. Scope and limits of migration projections. Answers to certain objections.
