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Table 6 Robustness test results of other spatial weight matrice

From: Carbon sequestration costs and spatial spillover effects in China's collective forests

 

Economic distance matrix

Geographic distance matrix

Direct

Indirect

Total

Direct

Indirect

Total

Forestry GDP

− 21.524***

− 0.879

− 22.403***

− 21.524***

− 0.879

− 22.403***

Wood production

− 2.355***

3.828***

1.473

− 2.355***

3.828***

1.473

Afforestation area

4.314***

− 4.445***

− 0.132

4.314***

− 4.445***

− 0.132

Labor Price

− 2.468**

2.565

0.097

− 2.468**

2.565

0.097

Land use costs

55.929***

20.436***

76.365***

55.929***

20.436***

76.365***

Rural consumption

19.591***

− 37.330***

− 17.739***

19.591***

− 37.330***

− 17.739***

Forest stock

− 8.163***

7.800***

-0.364

− 8.163***

7.800***

− 0.364

Population density

59.884***

− 53.651***

6.233

59.884***

− 53.651***

6.233

  1. The significance level is * p<0.1, * * p<0.05, * * * p<0.01, with t-statistic in parentheses