Average Treatment Effect of PDR Programs on Rate of Farmland Loss and Farmland Acres Lost during 1949–1997: Matched over Full sample and Restricted to within Same Time Period
| Epan Kernel Matching, Bandwidth = 0.02 (Bootstrapped Std. Error) | Uniform Kernel Matching, Bandwidth = 0.02 (Bootstrapped Std. Error) | |||
|---|---|---|---|---|
| Full Sample | Common Support | Full Sample | Common Support | |
| Matching over full sample | ||||
| Rate of loss: impact of PDR programs | −0.037 (0.01) | −0.036 (0.01) | −0.035 (0.01) | −0.033 (0.01) |
| Acres lost: impact of PDR programs | −2,942 (1,084) | −2,632 (987) | −2,855 (1,068) | −2,612 (938) |
| Number of matched treated counties | 184 | 178 | 184 | 178 |
| Number of matched control counties | 2,418 | 2,418 | 2,418 | 2,418 |
| Matching within time period | ||||
| Rate of loss: impact of PDR programs | −0.036 (0.01) | −0.032 (0.01) | −0.038 (0.01) | −0.031 (0.01) |
| Acres lost: impact of PDR programs | −1,900 (817) | −1,952 (862) | −1,932 (825) | −1,923 (851) |
| Number of matched PDR counties | 142 | 132 | 142 | 132 |
| Number of matched non-PDR counties | 812 | 812 | 812 | 812 |
Note: Bootstrapped standard errors are based on 2,000 iterations.