"Housing Inequality in the United States: A Decomposition Analysis of Racial and Ethnic Disparities in Homeownership"

In recent years, as the homeownership rate in the United States reached its highest level in history, homeownership itself remained unevenly distributed, particularly along racial and ethnic lines. By using data from the 2000 Integrated Public Use Microdata Series (IPUMS) and 2006 American Community Survey (ACS) to study the trajectory into homeownership of black, Asian, white, and Latino households, this paper explores the various socioeconomic and demographic characteristics, as well as the distinct immigration experiences and spatial patterns that shape racial and ethnic inequality in homeownership. The unique (merged) dataset enables the authors to distinguish assimilation (length of residence) from immigration cohort effects, and to control for various spatial characteristics at the PUMA (Public Use Microdata Area) level. The paper employs a decomposition technique that delineates the distinct effects that composition differentials have on the visible white-minority disparity in homeownership. The findings reveal substantial differences along racial-ethnic lines, highlight the importance of immigration and spatial context in determining Asian and Mexican homeownership rates, and emphasize the unique role that family structure and unobserved factors (e.g. prejudice and discrimination) continue to play in shaping the black-white homeownership gap.

"Access to Markets and Farm Efficiency: A Study of Rice Farms in the Bicol Region, Philippines"

This paper presents an empirical investigation of the relationship between the spread, spatially and temporally, of market institutions and improvements in the productivity and efficiency of farmers. The data used in this study were collected over two decades in a sample of rice farms in the Bicol Region of the Philippines. Our estimates reveal a significant inverse relationship between distance from the market and farm productivity and efficiency in 1983. While there are substantial improvements in yields, unit costs, and efficiency in the two decades that followed, the gains are larger in the more remote and sparsely populated villages. This finding suggests that the relationship between remoteness and farm outcomes has weakened over time. We also find that the development of markets in the peripheral villages and the improved connectivity between the peripheral villages and market centers are facilitated by population growth, infrastructural investments (specifically, irrigation and roads), and the availability of agricultural extension programs.Farm Efficiency; Agricultural Markets; Institutional Conditions; Philippines

"Racial Preferences in a Small Urban Housing Market: A Spatial Econometric Analysis of Microneighborhoods in Kingston, New York"

This paper use spatial econometric models to test for racial preferences in a small urban housing market. Identifying racial preferences is difficult when unobserved neighborhood amenities vary systematically with racial composition. We adopt three strategies to redress this problem: (1) we focus on housing price differences across microneighborhoods in the small and relatively homogenous city of Kingston, New York; (2) we introduce GIS-based spatial amenity variables as controls in the hedonic regressions; and (3) we use spatial error and lag models to explicitly account for the spatial dependence of unobserved neighborhood amenities. Our simple OLS estimates agree with the consensus in the literature that black neighborhoods have lower housing prices. However, racial price discounts are no longer significant when we account for the spatial dependence of errors. Our results suggest that price discounts in black neighborhoods are caused not by racial preferences but by the demand for amenities that are typically not found in black neighborhoods.Housing; Race; Neighborhood Amenities; Spatial Econometrics Commonwealth of Independent States

Explosive volcanism, shock metamorphism and the K-T boundary

The issue of whether shocked quartz can be produced by explosive volcanic events is important in understanding the origin of the K-T boundary constituents. Proponents of a volcanic origin for the shocked quartz at the K-T boundary cite the suggestion of Rice, that peak overpressures of 1000 kbars can be generated during explosive volcanic eruptions, and may have occurred during the May, 1980 eruption of Mt. St. Helens. Attention was previously drawn to the fact that peak overpressures during explosive eruptions are limited by the strength of the rock confining the magma chamber to less than 8 kbars even under ideal conditions. The proposed volcanic mechanisms for generating pressures sufficient to shock quartz are further examined. Theoretical arguments, field evidence and petrographic data are presented showing that explosive volcanic eruptions cannot generate shock metamorphic features of the kind seen in minerals at the K-T boundary

Supervision and Transaction Costs: Evidence from Rice Farms in Bicol, the Philippines

Labor markets in all economies are subject to transaction costs associated with recruiting, monitoring and supervising workers. Rural labor markets in developing economies, where institutions such as labor and contract law and formal employment assistance mechanisms are not in place, are regarded to be particularly sensitive to transaction cost conditions. The inherent difficult of measuring transaction costs has limited studies on this topic. In this paper, we analyze supervision activities reported in a cross-section survey of rice farmers in the Bicol region of the Philippines. This survey is unique because it provides supervision data at the farm task level. We present a simple optimization model in which supervision intensity increases the productivity of hired workers, which is assumed to be lower than that of family members due to the transaction costs. The model predicts that supervision intensity will increase with transaction costs. We use different institutional conditions to proxy for transaction costs, and estimate the demand for supervision time for four different classes of rice production tasks. The estimation strategy controls for selectivity in both hiring and supervising. The results show a positive effect of transaction costs on supervision intensity. We then extend the analysis to a farm efficiency specification to test the proposition that supervision activities improve farm efficiency. This framework allows us to relate institutional conditions to farm efficiency directly and indirectly through their effect on supervision activities. We find that transaction costs have a negative direct effect on farm efficiency, but this is partially offset by the positive efficiency effects of increased supervision intensity. The results enable us to associate institutional conditions with transaction costs and to draw policy inferences regarding the value of improved institutional conditions.Transaction Costs, Supervision, Labor Markets, Philippines

Women in Science: Surpassing Subtle and Overt Biases through Intervention Programs

This study discusses factors that keep women from entering science and technology, which include social stereotypes that they struggle against, lack of maternity leave and other basic human rights, and the climate that makes them leave research positions for administrative ones. We then describe intervention processes that have been successful in bringing the ratio of women close to parity, compare different minorities in the US, and also consider data from India, Western and Eastern Europe. We find that programs that connect the different levels of education are needed in addition to hiring more women, providing them with basic human rights from when they begin their PhD onwards and promoting support networks for existing employees. The authors of this paper hail from Sri Lanka, Romania, India, and the United States. We hold undergraduate and graduate degrees in physics or chemistry from the United States, India and Switzerland. Our conclusions are based on data that is publicly available, on data we have gathered, and on anecdotal evidence from our own experience.Comment: Submitted to the Frontiers Journal as part of the Women in Science Research Topi