The Journal of Health Politics, Policy and Law has published a study examining relative affordability of health coverage premiums under the national health care reform law and the expansion of the Children's Health Insurance Program (CHIP).  The authors compare the cost of covering a family in Illinois, Pennsylvania, and Washingon through a combination of CHIP and employer-sponsored coverage to that of a family obtaining coverage through one of the law's health exchanges. 

Gresenz, C., Laugesen, M., Yesus, A. and Escarce J.  (2011).  Relative affordability of health insurance premiums under CHIP expansion programs and the ACA.  The Journal of Health Politics, Policy and Law, 36 (3): 859-877.  doi: 10.1215/03616878-1407658.  http://jhppl.dukejournals.org/content/early/2011/07/22/03616878-1407658.full.pdf+html

Authors: Carole Gresenz, Miriam Laugensen, Ambeshie, Yesus and Jose Escarce.