Discussions of changes in the Social Security program must necessarily consider the impact of such changes on the well-being of the poor elderly. Under the current system, the financial needs of this population are met by the Supplement Security Income program (SSI). SSI has done much to improve...

Public expenditures on non-contributory pensions are equivalent to at least 1 percent of GDP in several countries in Latin America and is expected to increase. We explore the effect of non-contributory pensions on the well-being of the beneficiary population by studying the Pensiones...

This paper studies whether the impact of a cash transfer on child nutritional status is affected by the gender of its recipient. In the early 1990's, the benefits and coverage of the South African social pension program were expanded for the black population. In 1993, the benefits were about...

The creation of non-contributory pension schemes is becoming increasingly common as countries struggle to reduce poverty. Drawing on data from Mexico's Adultos Mayores Program (Older Adults Program) - a cash transfer scheme aimed at rural adults over 70 years of age - we evaluate the effects of...

We investigate the relationship between the extent of a city's subway network, its population and its spatial configuration. For the 632 largest cities in the world we construct panel data describing population, measures of centralization calculated from lights at night data, and the extent of...

Using data on 25 major American cities for the period 1900-1940, we explore the effects of municipal-level public health efforts that were viewed as critical in the fight against food- and water-borne diseases. In addition to studying interventions such as treating sewage and setting strict...

Urban density boosts productivity and innovation, improves access to goods and services, reduces typical travel distances, encourages energy-efficient construction and transport, and facilitates sharing scarce amenities. However, density is also synonymous with crowding, makes living and moving...

From 1995 to 2005, the average urban household saving rate in China rose by 7 percentage points, to about one quarter of disposable income. We use household-level data to explain why households are postponing consumption despite rapid income growth. Tracing cohorts over time indicates a virtual...

The Los Angeles riot of 1992 resulted in 52 deaths, 2,500 injuries and at least $446 million in property damage; this staggering toll rekindled interest in understanding the underlying causes of the widespread social phenomenon of rioting. We examine the causes of rioting using international...

In this paper, we compare participants in an artefactual field experiment in urban China with the survey population of migrants from which they were recruited. The experimental participants were more educated, more likely to lend money to friends, and worked fewer hours than the general...