The Impact of Digital Industry Clusters on County-Level Digital Technology Innovation

Including the dependent variable being digital technology innovation (Diginno); The explanatory variable is the degree of Digital Industry Clusters (DIC); Economic and social development indicators include the level of economic development (Nightlight), which is measured by the logarithm of the average nighttime light intensity; The industrial scale (Firm) is expressed as the logarithm of the number of industrial enterprises above designated size; Rationalization of industrial structure is calculated using the Theil index; Advanced industrial structure is represented by the ratio of the output value of the third and second industries; Population density is expressed as the year-end total population per square kilometer; Fixed assets investment is expressed in logarithm of fixed assets investment; Government size (Gov) is expressed as the logarithm of budget expenditures; Internet development level (Internet) is expressed by the logarithm of the number of fixed and mobile phone users; Foreign direct investment (FDI) is expressed as the logarithm of the actual utilization of foreign capital.

The indicators of natural geography and climate information include vegetation cover index (NDVI), ventilation index (Ventilation), rainfall, distance from the provincial capital, and slope.