| Matching Method | Participants | Participants | (US $) | Std. Err. | z-value |
| Nearest neighbour | 180 | 71 | 641.5 | 167.5 | 3.83 |
| Radius (0.005) | 133 | 150 | 628.5 | 151.4 | 4.15 |
| Kernel (BW 06) | 180 | 221 | 478.31 | 131.5 | 3.64 |
| Stratified (5 Strata) | 180 | 221 | 478.31 | 131.5 | 3.74 |