1. L.Y. Chu, D. Sappington, Optimal procurement contracts with no direct cost inflation, University of Southern California, Mimeo, January 2006 (available at 〈http://bear.cba.ufl.edu/sappington/working_papers.htm〉).
2. E. Eckholm, Ex-Halliburton man charged with defrauding U.S. of $3.5 million, New York Times, March 18, 2005, p. A10, 〈http://select.nytimes.com/gst/abstract.html?res=F40D1383B580C7B8DDDAA0894DD404482&fta=y&incamp=archive:article_related〉, Visited 8/29/06.
3. Optimal contracts under costly state falsification;Lacker;J. Polit. Econ.,1989
4. Using cost observation to regulate firms;Laffont;J. Polit. Econ.,1986
5. Cost padding, auditing and collusion;Laffont;Ann. Econ. Stat.,1992