Table 1—
Summary Statistics
| Mean | SD | Min | Max | |
|---|---|---|---|---|
|
| ||||
| Panel A. All counties, 1997 to 2003 | ||||
| Base payment ($ per month) | 490.58 | 83.96 | 222.99 | 777.91 |
| At least one plan (%) | 64.4 | 47.9 | 0 | 100 |
| Number of plans | 1.46 | 1.33 | 0 | 6 |
| MA enrollment (%) | 19.0 | 18.3 | 0 | 67.6 |
| TM costs ($ per month) | 486.53 | 103.94 | 136.87 | 940.08 |
| Panel B. County × years with at least one plan, 1997 to 2003 | ||||
| County-level premium ($ per month) | ||||
| Mean | 22.77 | 27.94 | 0 | 156.29 |
| Min | 15.47 | 26.35 | 0 | 156.29 |
| Median | 21.83 | 29.67 | 0 | 156.29 |
| Max | 31.73 | 33.23 | 0 | 194.47 |
| County-level benefits | ||||
| Physician copay ($ per visit) | 8.02 | 5.31 | 0 | 21.62 |
| Specialist copay ($ per visit) | 15.62 | 7.10 | 0 | 95.72 |
| Drug coverage (%) | 68.7 | 42.5 | 0 | 100 |
| Dental coverage (%) | 28.0 | 37.3 | 0 | 100 |
| Vision coverage (%) | 68.1 | 41.3 | 0 | 100 |
| Hearing aid coverage (%) | 38.2 | 43.2 | 0 | 100 |
| Number of plans | 2.26 | 0.97 | 1 | 6 |
| HHI | 6,030 | 2,460 | 1,920 | 10,000 |
| MA enrollment (%) | 28.6 | 16.2 | 0.8 | 67.6 |
| TM costs ($ per month) | 521.56 | 106.60 | 254.96 | 940.08 |
Notes: Table shows county-level summary statistics for the pooled 1997 to 2003 sample. Panel A shows values for the full set of county × years () that includes 100 percent of the Medicare population over this period. Panel B restricts the sample to county × years with at least one MA plan, which includes 4,262 county-years and 64 percent of all Medicare beneficiary-years. The unit of observation is the county × year, and observations are weighted by the number of beneficiaries in the county. All monetary values are inflation adjusted to 2000 using the CPI-U. County-level benefits are available for only 2000 to 2003.