Wisconsin's BadgerCare Plus reform: impact on low-income families' enrollment and retention in public coverage.

Objectives: To examine the impact of a Wisconsin health care reform enacted in early 2008 on public insurance enrollment and retention.

Data Sources: Administrative data covering the period January 2007 to November 2009.

Study Design: We calculate unadjusted enrollment trends and exit rates stratified by age, income group, and enrollment mode.