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The spatial mismatch hypothesis (SMH) argues that low-skilled minorities residing in US inner cities experience poor labour market outcomes because they are disconnected from suburban job opportunities. This assumption gave rise to an abundant empirical literature, which is rather supportive of the SMH. Surprisingly, it is only recently that theoretical models have emerged, which probably explains why the mechanisms of spatial mismatch have long remained unclear and not properly tested. This article presents relevant facts, reviews the theoretical models of spatial mismatch, confronts their predictions with available empirical results and indicates which mechanisms deserve further empirical tests.

The report identifies scarcity and weak governance as main land challenges in the MENA region. It describes how they affect land use and access, result in significant inefficiencies and inequities, and generate economic, environmental and social costs.

We consider a search-matching model in which black workers are discriminated against and the job arrival rates of all workers depend on social networks as well as distance to jobs. Location choices are mainly driven by racial preferences. There are multiple equilibria and we show that all workers are in general better off in the equilibrium where blacks are close to jobs. We also show that, in cities where black workers reside far away from jobs, the optimal policy is to impose higher quotas or employment subsidies than in cities where they live close to jobs.

This paper investigates the causal effects of the spatial organisation of Brussels on unemployment propensities. Using census data at the individual level, the unemployment probability of young adults is estimated while taking into account personal, household and neighbourhood characteristics. The endogeneity of residential locations is solved by restricting the sample to young adults residing with their parents; the potential remaining bias is evaluated by conducting a sensitivity analysis. The results suggest that the neighbourhood of residence significantly increases a youngster's probability of being unemployed, a result which is quite robust to the presence of both observed and unobserved parental covariates.

This paper offers a new theoretical approach to urban squatting, reflecting the view that squatters and formal residents compete for land within a city. The key implication is that squatters \"squeeze\" the formal market, raising the price paid by formal residents. The squatter organizer ensures that squeezing is not too severe, since otherwise, the formal price will rise to a level that invites eviction by landowners. Because eviction is absent in equilibrium, the model differs from previous analytical frameworks, where eviction occurs with some probability. It also facilitates a general equilibrium analysis of squatter formalization policies.

We review evidence regarding the size and evolution of the \"land rush\" in the wake of the 2007-8 boom in agricultural commodity prices, and we study the determinants of foreign land acquisition for large-scale agricultural investment. The use of data on bilateral investment relationships to estimate gravity models of transnational land-intensive investments confirms the central role of agro-ecological potential as a pull factor. However, this finding contrasts the standard literature insofar as the quality of the destination country's business climate is insignificant, and weak tenure security is associated with increased interest for investors to acquire land in the country. Policy implications are discussed.

Urban and peri-urban land markets in rapidly expanding West African cities operate within and across different coexisting tenure regimes and involve complex procedures to obtain or make land available for housing. Because a structured framework lacks for the analysis of such systems, this book proposes a systemic approach and applies it to Bamako and its surrounding areas. The framework revolves around the description of land delivery channels: starting from the status of tenure when the land is first placed in circulation for residential use, it identifies the processes whereby tenure can be improved, the types of transactions that take place along the way, and interactions between land delivery channels. The analysis of the system shows that land is initially provided through a customary land delivery channel--which predominates in peri-urban areas where land is being transformed from agricultural to residential use--and through a public and para-public channel, which involves the administrative allocation of residential plots to inhabitants and the transfer of land to developers. These two channels feed into the formal private channel which delivers serviced plots with ownership title at much higher prices. Plots in the various channels may be traded successively, with a degree of informality varying according to tenure, legality and registration of transactions. Whereas the development of the formal market is hindered by structural factors, the informal land market provides little tenure security. Targeted towards low and middle-incomes, it also attracts wealthy and well-connected buyers who have access to information and administrative and political power and can more easily formalize tenure. The sustained increase in land prices, numerous conflicts over land, high transaction costs and time-consuming formalization procedures, together with the involvement of a large number of stakeholders, combine to reduce affordability significantly and make access to secure land very difficult for the urban poor.

Do spatial differences in unemployment duration reflect residential sorting or a true local effect? Focusing on the 1300 municipalities of the Paris region, we apply a methodology that disentangles individual and unspecified municipality effects. Estimating a proportional hazard model stratified by municipality and recovering a survival function for each municipality purged of individual observed heterogeneity, we show that local and individual characteristics add up in their contribution to unemployment duration. While only 30% of the spatial disparities in unemployment duration are explained by individual characteristics, 70% of the remaining disparities are captured by local indicators, mainly correlated with residential segregation.

Interest in farmland is rising. And, given commodity price volatility, growing human and environmental pressures, and worries about food security, this interest will increase, especially in the developing world. One of the highest development priorities in the world must be to improve smallholder agricultural productivity, especially in Africa. Smallholder productivity is essential for reducing poverty and hunger, and more and better investment in agricultural technology, infrastructure, and market access for poor farmers is urgently needed. When done right, larger-scale farming systems can also have a place as one of many tools to promote sustainable agricultural and rural development, and can directly support smallholder productivity, for example, throughout grower programs. However, recent press and other reports about actual or proposed large farmland acquisition by big investors have raised serious concerns about the danger of neglecting local rights and other problems. They have also raised questions about the extent to which such transactions can provide long-term benefits to local populations and contribute to poverty reduction and sustainable development. Although these reports are worrying, the lack of reliable information has made it difficult to understand what has been actually happening. Against this backdrop, the World Bank, under the leadership of Managing Director Ngozi Okonjo-Iweala, along with other development partners, has highlighted the need for good empirical evidence to inform decision makers, especially in developing countries.