The methods used in most SAT validity studies cannot be justified by any sample selection assumptions and are uninformative about the source of the SAT's predictive power. A new omitted variables estimator is proposed; plausibly consistent estimates of the SAT's contribution to predictions of University of California freshman grade point averages are about 20% smaller than the usual methods imply. Moreover, much of the SAT's predictive power is found to derive from its correlation with high school demographic characteristics: The orthogonal portion of SAT scores is notably less predictive of future performance than is the unadjusted score.

During the Spring of 2002 and 2003, a team of faculty and institutional researchers conducted an innovative web-based survey on the undergraduate experience at all eight undergraduate campuses of the University of California. This report provides the first formal presentation of preliminary findings from that survey and discusses potential areas of relevance to policy for further research.

OBJECTIVE: To provide a national profile of the area variation in per-capita psychostimulant consumption in the U.S.

METHODS: We separated 3030 U.S. counties into two categories of 'low' and 'high' per-capita use of attention deficit hyperactivity disorder (ADHD) drugs (based on data from the Drug Enforcement Administration), and then analyzed them on the basis of their socio-demographic, economic, educational and medical characteristics.

RESULTS: We found significant differences and similarities in the profile of counties in the U.S. that are above and below the national median rate of per-capita psychostimulant use (defined as g/per 100K population). Compared to counties below the median level, counties above the median level have: significantly greater population, higher per-capita income, lower unemployment rates, greater HMO penetration, more physicians per capita, a higher ratio of young-to-old physicians and a slightly higher students-to-teacher ratio.

CONCLUSIONS: Our analysis of the DEA's ARCOS data shows that most of the significant variables correlated with 'higher' per-capita use of ADHD drugs serve as a proxy for county affluence. To provide a more complex, multivariate analysis of the area variation in psychostimulant use across the U.S.-which is the logical next step-requires obtaining price data to match the DEA's quantity data.

This article assesses how the institutional context of decision making on three-judge panels of the federal Court of Appeals affects the impact that gender and race have on judicial decisions. Our central question is whether and how racial minority and women judges influence legal policy on issues thought to be of particular concern to women and minorities when serving on appellate panels which decide cases by majority rule. Proper analysis of this question requires investigating whether women and minority judges influence the decisions of other panel members. We find that the norm of unanimity on panels grants women influence over outcomes even when they are outnumbered on a panel.

The goal of the 1996 Personal Responsibility and Work Opportunity Reconciliation Act (PRWORA) was to end the dependency of needy parents on government benefits, in part by promoting marriage. The pre-reform welfare system was widely believed to discourage marriage because it primarily provided benefits to single mothers. However, welfare reform may have actually decreased the incentives to be married by giving women greater financial independence via the program's new emphasis on work. This paper uses Vital Statistics data on marriages and divorces during 1989-2000 to examine the role of welfare reform (state waivers and TANF implementation) and other state-level variables on flows into and out of marriage. The results indicate that welfare reform has led to fewer new divorces and fewer new marriages, although the latter result is sensitive to specification and data choice.

This article analyzes adoption and impacts of Bt cotton in Argentina against the background of monopoly pricing. Based on survey data, it is shown that the technology significantly reduces insecticide applications and increases yields; however, these advantages are curbed by the high price charged for genetically modified (GM) seeds. Studies show that farmers’ average willingness to pay is less than half the actual technology price. A lower price would not only increase benefits for growers, but could also multiply company profits.