Comparing Estimates of the PSA Program’s Impact on 1997-2000 Deforestation
| Method | Without Bias Adjustment | With Bias Adjustment |
| 1. All Data | - 0.0061 (0.004) | - 0.0033 (0.004) |
| 2. PSM (n = 1) | - 0.0062 (0.004) | - 0.0053 (0.003) |
| 3. PSM (n = 2) | - 0.0047 (0.004) | - 0.0047* (0.003) |
| 4. PSM (n = 3) | - 0.0062***(0.002) | - 0.0062***(0.002) |
| 5. PSM (n = 6) | - 0.0041** (0.0017) | - 0.0042***(0.0015) |
| 6. PSM (n = 6) (just high-quality matches) | - 0.0042***(0.0015) | - 0.0042***(0.0015) |
| 7. PSM (n = 6) (using a caliper (0.002)) | - 0.0042** (0.0017) | - 0.0042***(0.0015) |
| 8. PSM (n = 6) (just very high-quality matches) | - 0.0047***(0.0016) | - 0.0047***(0.0016) |
| 9. CM (n = 6) | - 0.0042 (0.0029) | - 0.0044 (0.0029 ) |
| 10. PSM (n = 6) (dropping the observations with the 10% highest and the 10% lowest propensity scores) | - 0.0013 (0.0009) | - 0.0013 (0.0009) |
| 11. CM (n = 6) (dropping the observations with the 10% highest and the 10% lowest propensity scores) | - 0.0032 (0.0029) | - 0.0035 (0.0029 ) |
Note: Robust standard errors in parentheses.
↵*, **, *** Significance at 90%, 95%, and 99%, respectively.