1. Fixed Effects Regression Models
2. American Medical Association 2013a CMS to Begin Processing Claims with 2.2 Percent Increase AMA http://www.ama-assn.org/ama/pub/physician-resources/solutions-managing-your-practice/coding-billing-insurance/medicare/medicare-claims-payment.page
3. American Medical Association 2013b Overview of RBRVS AMA http://www.ama-assn.org/ama/pub/physician-resources/solutions-managing-your-practice/coding-billing-insurance/medicare/the-resource-based-relative-value-scale/overview-of-rbrvs.page
4. Bureau of Labor Statistics 2013 CPI Inflation Calculator http://data.bls.gov/cgi-bin/cpicalc.pl
5. Centers for Medicare and Medicaid Services 2013a Medicare Physician Fee Schedule http://www.cms.gov/apps/physician-fee-schedule/overview.aspx