Table 4. State data: Ordinary least squares (OLS) estimates—Number of physicians per 100,000 residents
(1985, 1990, 1995, and 2000 data with dummy time variables; N = 196)
| Explanatory variable |
Coefficient |
Standard error |
t statistic |
| Intercept |
104.54 |
30.08 |
3.47 |
| Percent of population age 65 years or older |
3.89 |
1.78 |
2.19 |
| Hospital beds per 1,000 residents |
-.03 |
.03 |
-1.02 |
| Percent of population unemployed |
-4.59 |
1.92 |
-2.39 |
| Population in thousands of residents per square mile |
16.67 |
2.20 |
7.58 |
| Personal income in thousands of dollars |
5.00 |
.96 |
5.21 |
| Farm income as percent of state domestic product |
-4.20 |
1.09 |
-3.81 |
| State law capping damage awards in malpractice cases (1=yes, 0=no) |
23.99 |
6.21 |
3.86 |
| 1985 (1=yes, 0=no) |
24.08 |
10.98 |
2.19 |
| 1995 (1=yes, 0=no) |
-16.08 |
8.80 |
-1.83 |
| 2000 (1=yes, 0=no) |
78.96 |
21.50 |
3.67 |
| Adjusted R2= .58. |
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