The elapsed time taken to earn a Ph.D. in economics is analyzed with data from 620 (of about 950) 1996-97 Ph.D.s. The median is 5.3 years. A duration model indicates that those students at several of the most highly regarded programs, those supported by no-work fellowships, and those holding a...

Data on 2,822 Vanderbilt University graduates are used to investigate alumni giving behavior during the eight years after graduation. A two stage model accounting for incidental truncation is used to first estimate the likelihood of making a contribution and second estimate the average gift size...