By the end of 1999 HIV/AIDS was present in at least 200 countries and approximately 34.3 million people were living with the disease, 5.3 million of whom had been infected in that year alone (WHO 2000). Approximately 21.8 million persons had died from AIDS by 2000 and countries where life...

We use unique data from the Medicaid program of the Commonwealth of Kentucky to examine the duration of Medicaid spells. The data set consists of a one in ten sample of all Medicaid recipients in Kentucky on July 1, 1986, and a similar sample of all new spells between July 1, 1986, and June 30,...

This paper examines the impact of maternal employment during a child’s first three years and during adolescence on his or her decisions to engage in a range of risky behaviors: smoking cigarettes, drinking alcohol, using marijuana and other drugs, engaging in sex and committing crimes. Using...

Loss of a parent is one of the most traumatic events a child can face. If loss of a parent reduces investments in children, it can also have long-lasting implications. This study uses parametric and semi-nonparametric matching techniques to estimate how one human capital investment, school...

This paper examines the associations between obesity, employment status and wages for several European countries. Our results provide weak evidence that obese workers are more likely to be unemployed or tend to be more segregated in self-employment jobs than their non-obese counterparts. We also...

Usage of health facilities in Ethiopia is among the lowest in the world; raising usage rates is probably critical for improving health outcomes. The government has diagnosed the principal problem as the lack of primary health facilities and is devoting a large share of the health budget to...

Expert systems use computational techniques that involve making decisions, just as human experts do, but it is well known that human experts may be wrong from time to time. We used to think that designing and using an expert system will solve this problem, but unfortunately expert systems can...

This work illustrates an approach to the study of labeling, aka 'object classification'. This kind of parallel computing problem well suites to AI applications (pattern recognition, edge detection, etc.) Our target consists in simplifying an overly computationally costly algorithm proposed by...