1. Bertrand, M., E. Duflo and S. Mullainathan (2002). ?How Much Should We Trust Differences-in-Differences Estimates??NBER Working Paper 8841. Cambridge MA: NBER.
2. Bureau of Labor Statistics. (2002). ConsumerPrice Indices. Available at: < www.bls.gov/cpi/ >, accessedMarch 20, 2002.
3. Card, D. and D. Hyslop (1997). ?Does Inflation ?Grease the Wheels? of the Labor Market??In C.D. Romer, D.H. Romer (eds.) Reducing Inflation: Motivation and Strategy. NBER Studies in Business Cycles, vol 30. Chicago & London: Univ. Chicago Press, pp. 71?114.
4. Current Population Survey, March Supplement. (2000). Available at: < ferret.bls.census.gov/macro/032001/perinc/ new01_016.htm >, accessed January 6, 2002.
5. Cutler, D.M. and B.C. Madrian (1998). ?Labor Market Responses to Rising Health Insurance Costs: Evidence on Hours Worked.?RAND Journal of Economics 23(3), 509?530.