Table 3 Robustness tests.
Variable | Mean value of nighttime light | Actual GDP | Total value of nighttime light (2011–2018) | ||||||
|---|---|---|---|---|---|---|---|---|---|
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | |
Intra | Inter | Dual weight | Intra | Inter | Dual weight | Intra | Inter | Dual weight | |
\({W}_{\text{in}}K\) | 26.542*** | 28.241*** | 3.938** | 1.846 | 56.024*** | 62.251*** | |||
(6.515) | (6.941) | (3.884) | (4.222) | (8.443) | (9.418) | ||||
\({W}_{{in}}L\) | 2.415** | 2.585** | 0.795*** | 0.567** | 3.990*** | 4.582*** | |||
(1.190) | (1.273) | (0.230) | (0.221) | (1.273) | (1.354) | ||||
\({W}_{{out}}K\) | −16.423* | −16.406* | −23.423** | −20.518* | −18.968 | 55.074 | |||
(9.411) | (8.812) | (9.627) | (10.661) | (41.618) | (34.930) | ||||
\({W}_{{out}}L\) | 0.683** | 0.487* | 0.865* | 0.712 | 1.103 | 1.367 | |||
(0.309) | (0.289) | (0.635) | (0.627) | (1.866) | (1.690) | ||||
Control | YES | YES | YES | YES | YES | YES | YES | YES | YES |
Observations | 920 | 920 | 920 | 920 | 920 | 920 | 736 | 736 | 736 |
R-squared | 0.977 | 0.975 | 0.977 | 0.995 | 0.995 | 0.996 | 0.971 | 0.967 | 0.971 |
yearfix | YES | YES | YES | YES | YES | YES | YES | YES | YES |
infix | YES | YES | YES | YES | YES | YES | YES | YES | YES |
