1. Does competition from HMOs affect fee-for-service physicians?;Baker;NBER Working Paper No. 4920,1994
2. County-level measures of HMO enrollment and market share, mimeo;Baker,1995
3. The effects of HMOs on conventional insurance premiums: Theory and evidence;Baker;NBER Working Paper No. 5356,1995
4. HMO penetration and the cost of health care: Market discipline or market segmentation;Baker;American Economic Review,1996
5. The cure can be worse than the disease: A cautionary tale regarding instrumental variables;Bound;NBER Technical Paper No. 137,1993