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Fig 1.

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Table 1.

Population, area, and distribution of China’s border counties in 2010.

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Table 2.

Speed setting table for calculating cost distance.

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Table 2 Expand

Table 3.

Description of selected independent variables in the regression analysis.

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Fig 2.

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Fig 3.

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Fig 4.

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Table 4.

Changes in China’s border county populations.

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Fig 5.

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Table 5.

Regression results of full variable models.

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Table 5 Expand

Table 6.

Results of stepwise regression models.

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Fig 6.

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