This article by the Robert Wood Johnson Foundation analyzes the impact that the merger of Wisconsin's Badger Care and the state Medicaid program have had in enrollment and retention. The key findings include an increase of 33% in overall enrollment, made up of a 29% increase in enrollment of children and a 46% increase in adult enrollment.

Leininger, L. J., et. al. (2011).  Wisconsin's BadgerCare Plus reform: impact on low-income families' enrollment and retention in public coverage. Health Services Research, 46(1): 336-347. doi: 10.1111/j.1475-6773.2010.01215. http://onlinelibrary.wiley.com/doi/10.1111/j.1475-6773.2010.01215.x/abstract

Authors: Lindsey J. Leininger, Donna Friedsam, Laura Dague, Shannon Mok, Emma Hynes, Alison Bergum, Milda Aksamitauskas, Thomas Oliver, and Thomas DeLeire