Table 14 Robustness test.
From: Spatial spillover effect and heterogeneity of digital economy on agricultural carbon emissions
Variable | (1) Increase control variables | (2) Shorten the time window width | (3) The independent variable lags behind by one period |
|---|---|---|---|
DIG | − 0.918** (0.417) | − 0.817* (0.496) | − 1.048* (0.546) |
Controls | Yes | Yes | Yes |
_cons | 8.375*** (1.540) | 7.477*** (0.990) | 7.564*** (1.070) |
Observations | 330 | 210 | 300 |
R-squared | 0.882 | 0.885 | 0.883 |
