Table 2.

Summary of measurements for each variable.

Symbolic	Connotation	Measurement methods	Data sources
DIG	Digital Economy	Development Level of Digital Economy（）Table 1	China Statistical Yearbook
AI	Level of Artificial Intelligence development	The ratio of fixed assets investment to GDP in information transmission, computer services, and software industry	The Website of the National Bureau of Statistics of China
TYC	Sports industry	Sports industry value added	The websites of provincial (municipal) sports bureaus, provincial (municipal) sports industry work reports and authoritative media news reports