Race and Home Ownership from the End of the Civil War to the Present

We present new estimates of home ownership for black and white households from 1870 to 2007. Black ownership increased by 46 percentage points, whereas white ownership increased by 20 points. Remarkably, 25 of the 26 point narrowing occurred between 1870 and 1910. Part of this early convergence is accounted for by falling white ownership due to movement out of agriculture, but most is accounted for by post-emancipation gains among blacks. After 1910, white and black households increased ownership, but the racial gap barely changed. We discuss the influence of residential segregation, public policy, and permanent income on the ownership gap.

The Political Economy of Fair Housing Laws Prior to 1968

The confluence of the Great Migration and the Civil Rights Movement propelled the drive for fair-housing' legislation which attempted to curb overt discrimination in housing markets. This drive culminated in the passage of the federal Civil Rights Act of 1968. By that time, 57 percent of the U.S. population and 41 percent of the African-American population already resided in states with a fair-housing law. Despite laying the political and administrative groundwork for the federal Fair Housing Act of 1968, the origins and diffusion of these state laws have not received much attention from scholars, let alone been subject to statistical efforts to disentangle multiple influences. This paper uses hazard models to analyze the diffusion of fair-housing legislation to shed new light on the combination of economic and political forces that facilitated the laws' adoption. Ceteris paribus, outside the South, states with larger union memberships, more Jewish residents, and more NAACP members passed fair-housing laws sooner than others. The estimated effects are not undermined by including controls for a variety of competing factors and are supported by historical accounts of the legislative campaigns.

An analysis of the relationship between published interim accounting earnings and future interim accounting earnings / BEBR No. 671

Title page includes summary.Includes bibliographical references (p. 20-21)

Regularization Schemes and Higher Order Corrections

I apply commonly used regularization schemes to a multi-loop calculation to examine the properties of the schemes at higher orders. I find complete consistency between the conventional dimensional regularization scheme and dimensional reduction, but I find that the four dimensional helicity scheme produces incorrect results at next-to-next-to-leading order and singular results at next-to-next-to-next-to-leading order. It is not, therefore, a unitary regularization scheme.Comment: References added and typographical errors correcte

The Four Dimensional Helicity Scheme Beyond One Loop

I describe a procedure by which one can transform scattering amplitudes computed in the four dimensional helicity scheme into properly renormalized amplitudes in the 't Hooft-Veltman scheme. I describe a new renormalization program, based upon that of the dimensional reduction scheme and explain how to remove both finite and infrared-singular contributions of the evanescent degrees of freedom to the scattering amplitude.Comment: 20 page

Infrared Thermography for Weld Inspection: Feasibility and Application

Traditional ultrasonic testing (UT) techniques have been widely used to detect surface and sub-surface defects of welds. UT inspection is a contact method which burdens the manufacturer by storing hot specimens for inspection when the material is cool. Additionally, UT is only valid for 5 mm specimens or thicker and requires a highly skilled operator to perform the inspections and interpret the signals. Infrared thermography (IRT) has the potential to be implemented for weld inspections due to its non-contact nature. In this study, the feasibility of using IRT to overcome the limitations of UT inspection is investigated to detect inclusion, porosity, cracking, and lack of fusion in 38 weld specimens with thicknesses of 3, 8 and 13 mm. UT inspection was also performed to locate regions containing defects in the 8 mm and 13 mm specimens. Results showed that regions diagnosed with defects by the UT inspection lost heat faster than the sound weld. The IRT method was applied to six 3 mm specimens to detect their defects and successfully detected lack of fusion in one of them. All specimens were cut at the locations indicated by UT and IRT methods which proved the presence of a defect in 86% of the specimens. Despite the agreement with the UT inspection, the proposed IRT method had limited success in locating the defects in the 8 mm specimens. To fully implement in-line IRT-based weld inspections more investigations are required

Distribution of Per Capita Income in Georgia: 1969-2000

Since the mid 1980s, the state of Georgia has been popularly characterized as consisting of two (or more) distinct economies or economic regions, the Atlanta Region and the remainder of the state. Since the appearance of the term "two Georgias" in the local lexicon, policy makers have attempted to address problems associated with the perception that Atlanta and its surrounding counties are experiencing tremendous economic growth, while the remainder of the state languishes. Because the quality and quantity of local public services are determined, in part, by local economic activity, concerns have been raised about the existence of two Georgias and how such an economic partition might affect the distribution of revenue generating capacity among counties across the state.Past research suggests that the average income of different areas of a country tend to converge as overall income rises. Using per capita personal income (PCI) data from the Bureau of Economic Analysis (BEA), we compare 1969 PCI with 2000 PCI to determine: 1) if convergence has occurred 2) how changes in PCI are geographically distributed, and 3) whether these data support the popular conception that Georgia consists of two separate economies. Report #9

Race and the Value of Owner-Occupied Housing, 1940-1990

The racial gap in the value of owner occupied housing has narrowed substantially since 1940, but this narrowing has not been even over time or across space. The 1970s stand out as an unusual decade in which the value gap did not narrow despite continued convergence in the observed characteristics of housing. A decline in the relative value of black-owned homes in central cities appears to have offset gains elsewhere during the 1970s, and this central city decline continued into the 1980s. In further exploration of the 1970s, we find evidence of a rising propensity for higher-income blacks to live in the suburbs. We also find a positive correlation between riots in the 1960s and widening of the value gap during the 1970s in a panel of cities.

"Race and the Value of Owner-Occupied Housing, 1940-1990"

The racial gap in the value of owner-occupied housing has narrowed substantially since 1940, but this narrowing has not been even over time or across space. The 1970s stand out as an unusual decade in which the value gap did not narrow despite continued convergence in the observed characteristics of housing. A decline in the relative value of black-owned homes in central cities appears to have offset gains elsewhere during the 1970s, and this central city decline continued into the 1980s. In further exploration of the 1970s, evidence is found of a rising propensity for higher-income blacks to live in the suburbs. A positive correlation between riots in the 1960s and widening of the value gap during the 1970s in a panel of cities also is found.

Two-Loop Virtual Corrections to Drell-Yan Production at order alpha_s alpha^3

The Drell-Yan mechanism for the production of lepton pairs is one of the most basic processes for physics studies at hadron colliders. It is therefore important to have accurate theoretical predictions. In this work we compute the two-loop virtual mixed QCD x QED corrections to Drell-Yan production. We evaluate the Feynman diagrams by decomposing the amplitudes into a set of known master integrals and their coefficients, which allows us to derive an analytical result. We also perform a detailed study of the ultraviolet and infrared structure of the two-loop amplitude and the corresponding poles in epsilon.Comment: 20 pages, 3 figure