I received this interesting note from Dr. Greg Little (see yesterday’s post) explaining his research methods in more detail and discussing his findings:
Overall you present a good summary. But I can answer your questions. The study’s subjects all applied for entry into a drug treatment program (MRT) operated by the Shelby County Correction Center in Memphis, TN from 1986-1991. All were felons serving from 1 to 6 years. The control group was formed from a smaller number of individuals who were randomly excluded because of limited treatment slots. The treated subjects were randomly selected to enter…after all the subjects were placed into a pool of eligibles. ...