http://www.rand.org/pubs/monographs/2005/RAND_MG288.pdf
K. Jack Riley, Nancy Rodriguez, Greg Ridgeway, Dionne Barnes-Proby, Terry Fain, Nell Griffith Forge, Vincent Webb and Linda J. Demaine
"Prosecution and Plea-Bargaining Resulting in Prison Sentences on Low-Level Drug Charges in California and Arizona."