变量及指标 | 固定效应模型 | 随机效应模型 | ||||
① 静态模型 | ② 动态模型 | ③ 全样本 | ④ 除2003年 | ⑤ 除2010年 | ⑥ 除2020年 | |
IP | 0.229*** | 0.221*** | 0.199*** | 0.206*** | 0.175*** | 0.196*** |
| (6.48) | (6.39) | (5.53) | (5.66) | (4.62) | (5.53) |
RP | −0.547*** | −0.413*** | −0.730*** | −0.731*** | −0.741*** | −0.718*** |
| (−4.00) | (−3.03) | (−6.21) | (−6.13) | (−6.15) | (−6.06) |
lnGDP | 0.363*** | 0.256** | 0.484*** | 0.486*** | 0.476*** | 0.491*** |
| (3.23) | (2.20) | (6.08) | (5.99) | (5.86) | (6.06) |
lnRoad | 0.006 | 0.045 | 0.177** | 0.197*** | 0.179** | 0.165** |
| (0.07) | (0.48) | (2.46) | (2.63) | (2.47) | (2.26) |
Urban | 0.019*** | 0.009 | −0.003 | −0.003 | −0.003 | −0.003 |
| (2.77) | (1.23) | (−0.75) | (−0.83) | (−0.83) | (−0.79) |
lnFinGDP | 0.320*** | 0.206*** | 0.333*** | 0.330*** | 0.337*** | 0.342*** |
| (5.31) | (3.18) | (6.26) | (5.96) | (6.26) | (6.37) |
COVID | −0.219*** | −0.080 | −0.174*** | −0.183*** | −0.175*** | −0.125* |
| (−3.61) | (−1.30) | (−2.96) | (−3.09) | (−3.01) | (−1.73) |
Highway | 0.092*** | 0.065** | 0.102*** | 0.113*** | 0.111*** | 0.095*** |
| (3.50) | (2.32) | (4.28) | (4.52) | (4.62) | (3.90) |
L.lnCars |
| 0.312*** |
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| (8.18) |
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_cons |
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| −4.242*** | −4.347*** | −4.219*** | −4.258*** |
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| (−12.56) | (−12.47) | (−12.17) | (−12.42) |
Wx: |
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lnCarPro | 0.208*** | 0.252*** | 0.059* | 0.060* | 0.064* | 0.062* |
| (4.62) | (5.49) | (1.68) | (1.72) | (1.72) | (1.76) |
lnCarOwn | −0.582*** | −0.474*** | −0.306*** | −0.276*** | −0.347*** | −0.369*** |
| (−5.07) | (−4.07) | (−3.07) | (−2.68) | (−3.41) | (−3.61) |
lnFreight | 0.636*** | 0.406** | 0.142** | 0.125* | 0.152** | 0.167*** |
| (3.27) | (2.02) | (2.27) | (1.93) | (2.39) | (2.64) |
Spatial: |
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rho | 0.138 | 0.091 | 0.211** | 0.191** | 0.255*** | 0.248*** |
| (1.40) | (0.90) | (2.34) | (2.05) | (2.81) | (2.75) |
Variance: |
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sigma2_e | 0.113*** | 0.112*** | 0.124*** | 0.126*** | 0.120*** | 0.120*** |
| (17.59) | (18.06) | (16.93) | (16.48) | (16.42) | (16.44) |
N | 620 | 589 | 620 | 589 | 589 | 589 |
R2 | 0.573 | 0.729 | 0.905 | 0.903 | 0.908 | 0.907 |