Table 1.
Descriptive Statistics
| Minimum | 25th Percentile | Median | 75th Percentile | Maximum | |
|---|---|---|---|---|---|
| Number of plans, 2010 | 0 | 3 | 6 | 9 | 55 |
| Number of plans, 2011 | 0 | 3 | 6 | 9 | 50 |
| Change in plans | −9 | −1 | 0 | 0 | 7 |
| Number of contracts, 2010 | 0 | 2 | 3 | 4 | 27 |
| Number of contracts, 2011 | 0 | 2 | 3 | 4 | 27 |
| Change in contracts | −3 | 0 | 0 | 0 | −3 |
| MA enrollment, 2010 | 0 | 3.6% | 7.7% | 14.2% | 50.7% |
| MA enrollment, 2011 | 0 | 3.8% | 7.9% | 14.2% | 55.5% |
| Change in MA enrollment | −15.9% | −0.2% | 0.4% | 1.2% | 16.0% |
| MA payment generosity, 2010 | −489 | 79 | 137 | 188 | 752 |
Note. all figures are based on data from HMO and PPO MA plans only.
Source: CMS's “Medicare Options Compare” files for 2010–2011, contract-plan-state-county enrollment data for 2010–2011, and Ratebook data for 2010–2011.