Abstract: Information transmission goes through the entire process of social risks spreading, which is largely influenced by governmental governance. This paper, in terms of the relation between information transmission and social risks, elaborates the necessity of information management, and establishes a social risk information transmission model based on classic transmission models combined with the major position of government in information management, which is used to study the impact of governmental governance on social risk information transmission rules. Simulation study which is conducted on cases of social risk management of engineering project suggests that governmental governance on information management prolongs its reaching peak and stability of risk information transmission, helpful in mitigating social risk transmission. Administration and positive response can increase the proportion of the susceptible in information transmission system, and decrease the proportion of infected and the potential reaching peak, both mitigating social risk information transmission simultaneously. Positive response is more effective to impact the parameters of information transmission system. The paper presents suggestions on policies from the entire information flowing process of information collection, processing and distribution.

Key words: governmental governance, information transmission, social risk, SEIR model

摘要： 信息传播贯穿社会风险扩散的全过程，政府治理行为对风险信息传播有着重要影响，直接影响社会风险治理效果。本文在分析信息传播与社会风险关系的基础上，阐述信息治理的必要性，结合政府在信息治理中的主体地位，借鉴经典传染性模型，构建社会风险信息传播模型，研究政府治理行为对其传播规律的影响，并以工程项目社会风险治理为例进行仿真研究。仿真结果表明：1）政府信息治理延长了风险信息传播达到峰值和稳态的时间，有助于减缓社会风险传播；2）行政干预与正面回应都能增加信息传播系统中易感者比例，减少感染者比例以及达到峰值时的潜伏者比例，同时达到减缓社会风险信息传播的目的；3）正面回应对信息传播系统中各参数影响较大，正面回应手段更有效。从信息搜集、处理、发布的信息流动全过程视角，提出相关政策建议。

关键词: 政府治理行为, 信息传播, 社会风险, SEIR模型