Testing the exclusion restriction
| 2001 | 2002 | 2003 | 2004 | |
|---|---|---|---|---|
| P > z in probit regression (s = 1) | 0.000 | 0.000 | 0.000 | 0.000 |
| P > t if included in donations equation | 0.062 | 0.701 | 0.367 | 0.885 |
| P > t in regression of residuals from donations equation | 0.400 | 0.870 | 0.556 | 0.921 |
| 2001 | 2002 | 2003 | 2004 | |
|---|---|---|---|---|
| P > z in probit regression ( | 0.000 | 0.000 | 0.000 | 0.000 |
| P > t if included in donations equation | 0.062 | 0.701 | 0.367 | 0.885 |
| P > t in regression of residuals from donations equation | 0.400 | 0.870 | 0.556 | 0.921 |
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