Table 1 Meaning of notation in the models.
Notation in the model | Meaning of notation |
|---|---|
\({{Inno}}_{{it}}\) | Innovation performance of an enterprise, including the number of patent applications and patent citations |
\({{DID}}_{{it}}\) | Dummy variable of the policy |
\({{DDD}}_{{ijt}}\) | Interactive term of DID and the variable of regional digital technology level, including the size of digital talent pool, the level of digital technology development and the level of digital technology service |
\({M}_{{it}}\) | Mechanism variable, including the capability to connect with external relationships, the capability to adapt to change, and the capability to mitigate financing constraints |
\({X}_{i(j)t}\) | Control variables of enterprises |
\({\mu }_{i}\) | Enterprise fixed effects |
\({\gamma }_{t}\) | Time fixed effects |
\({\delta }_{j}\) | Region fixed effects |
\({\varepsilon }_{i(j)t}\) | The error terms |
\(C\) | All control variables, time fixed effects, and individual fixed effects |
