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