Chapter two Explaining the reason why the government gets involved in agricultural risk management, Expounding the cobweb theory, theory of information bug, theory of system innovation.

• 第二章 在理论上阐述政府为什么要介入农业风险管理。 主要从蛛网理论、信息缺陷理论、制度创新理论等角度，阐释政府介入的必要性。