This study by Health Services Research examines Medicaid-Managed Care in the context of the Medicaid Undercount. Previous studies have contributed the Medicaid Undercount to Medicaid-Managed Care enrollment, but this study did not find this to be true. Thus, the study suggests that additional survey techniques be developed to identify the number of the uninsured in the United States.  

Plotze, M., et. al. (2010). How Does Medicaid-Managed Care Impact Reporting of Medicaid Status?. Health Services Research. doi: 10.1111/j.1475-6773.2010.01133.x. http://onlinelibrary.wiley.com/doi/10.1111/j.1475-6773.2010.01133.x/abstract

Authors: Michael R. Plotzke, Jacob A. Klerman, and Michael Davern