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,...