Endogeneity test

Endogeneity test

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Since the "digital economy" was officially written into the report of the 19th National Congress of the CPC in 2017, the digital transformation of enterprises has become the only way for the sustainable development of enterprises. In this paper, high-speed railway, which is also in the stage of rapid development, is selected as the research object,...

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... Table 7, it can be seen that the opening of high-speed rail has a positive impact on the instrumental variable at the 1% significance level. Then it was substituted for the explanatory variable and brought into the main regression equation, and the results showed that the regression coefficient was still significantly positive at the 1% level. ...

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