Table 4 Sample exclusion and placebo test.
(1) Excluding the sample of certain villages on both sides of the ethnic boundary | (2) Excluding the non-working age sample | (3) Placebo test | |
|---|---|---|---|
RD_Estimate | −0.3336*** (0.0408) | −0.3059*** (0.0373) | −0.1860*** (0.0835) |
Kernel | Triangle | Triangle | Triangle |
Bandwidth (km) | 11 | 11 | 9 |
Observations | 2087 | 1819 | 563 |