QUESTION: states with policies allowing companies to set up shop in prison?

question / pregunta: 

In a 2004 issue of Social Politics, Lynne Haney stated that 36 states have enacted policies allowing companies to set up shop in their prisons. How would I find out which states these are and, if the number of states have increased since then, which other states have enacted similar policies?

Answers

Working on it--in the meantime, perhaps check through the paper Ms. Haney cited for that statistic:
Atkinson, Rob and Knut Rostad. 2003. "Can Inmates Become an Integral Part of the U.S. Workforce?" Paper presented at the Urban Institute Reentry Roundtable, New York University, May 19-20.