Using the firm level data on companies listed on China’s A-shares market from 2006 to 2017, this paper applies a difference-in-differences (DID) empirical method to test whether the exogenous state policy in China used for identifying firms as either “high-tech” or “frontier...

In this paper we propose an analytic model for describing the epidemic spreading action on the one-dimensional small-world network. Based on the model, the epidemic spreading behaviors without immune strategy and with immune strategy are studied under different conditions. The obtained results...