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Table 1.

ID evaluation indicator system.

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Table 2.

Variable definition and description.

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Table 3.

Descriptive statistics of the main variables.

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Table 4.

Baseline regression results.

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Table 5.

Two-Stage Least Squares Results Using Lagged ID as Instrumental Variable.

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Table 6.

Two-Stage Least Squares Results Using 1984 Fixed-Line Telephones as Instrumental Variable.

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Table 7.

Robustness tests.

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Table 8.

Heterogeneity regression results.

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Table 9.

Mechanism Test results: Information Services Employment and Software Business Revenue.

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Table 10.

Mechanism Test result: Income of Agricultural Migrants and Urban Mobile Population.

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