Variable category | Variable sits | Variable definition |
Explained variables | ainva | The number of invention patents filed in the current year |
ginva | The number of invention patents granted in the current year | |
aiu | The sum of the invention patents and utility patents filed in the year | |
giu | The sum of the invention patents and utility patents obtained in the year | |
Explaining variables | treat | The year after the opening of the HSR station is treats 1, and the year before the opening of the HSR station is the year of the storts 0 |
Group variables | divide | Divided into East, Central, West |
Tool variables | periodb | In 1949, if the city had set up a railway station, period b = 1; |
sitenum | The number of HSR station | |
Control variables | pgdp | per capita GDP |
secience | Expenditure on local financial science and business expenses | |
sec | Secondary sector as a share of GDP | |
thi | Tertiary industry as a share of GDP | |
pd | Region Population Density | |
Fc | Amount of foreign capital actually used in the current year | |
hstudent | The number of students enrolled in general higher education institutions | |
Mediation variables | inv | Total fixed asset investment |
telephone | The number of mobile phone ownerships |