Abstract: The government information disclosure system is spreading faster in the stage of induced diffusion than the imposed diffusion stage. This is contrary to the existing theoretical explanation. Due to the lack of empirical research that discusses the diffusion mechanism to find a reasonable explanation based on the policy diffusion theory， this paper used discrete time event history analysis (EHA) to analyze the panel data of 31 provinces in China from 2004 to 2015， and tested the organizational behavior logic that plays a leading role in different diffusion stages. It is found that government information disclosure system is driven by efficiency logic and actor logic in the induced diffusion stage， and influenced by legitimacy logic and efficiency logic in the imposed diffusion stage. This research helps to deepen the understanding of the internal logic of policy innovation diffusion of local governments in China and provides a theoretical basis for the follow-up research.

Key words: government information disclosure, policy diffusion, event history analysis, induced diffusion, imposed diffusion