After a long dormant period, Lower Sixth Avenue in New York has under gone a rapid revitalisation. We show that a simple search theoretic model with information spillovers can explain both the period of underuse and the rapid turnaround. The model reduces to a simple equation, which allows us to do comparative statics on the duration of vacancies. We show how the solution reacts to changes in market structure and changes in search technology. The model is suggestive of difficulties that may occur in many markets in which there are changes over time in the optimal use of resources.
The conventional wisdom on racial integration in the United States is that there are three kinds of neighborhoods: the all-white neighborhood, the all-black neighborhood, and the exceedingly rare, highly unstable, racially mixed neighborhood. The only real disagreement is about why so few neighborhoods are successfully integrated. Some attribute it to white discrimination pure and simple: whites, that is, have consciously and determinedly excluded blacks from their communities. Others contend that it is a matter of minority choice. Like Norwegians in Brooklyn's Bay Ridge and Italians in Manhattan's Little Italy, African Americans, they explain, prefer to live among their own kind. Finally, others maintain that segregation is driven mainly by income differences across racial groups. But almost all agree that when African Americans do manage to gain a foothold in a previously all-white community, the whites move away in droves—a phenomenon well known as "white flight." Integration is no more than, in the words of Saul Alinsky, the "time between when the first black moves in and last white moves out."
This article synthesizes findings from a wide range of empirical research into how neighborhoods affect families and children. It lays out a conceptual framework for understanding how neighborhoods may affect people at different life stages. It then identifies methodological challenges, summarizes past research findings, and suggests priorities for future work.