作为社会治理的工具,良好的政策方案主要是由其有效性和可行性两项标准来界定的。从有效性和可行性两个维度出发,可以建构一个简化的政策方案的类型谱系。不同的政策方案处于这个类型谱系的不同位置上,具有不同程度的有效性和可行性。在政策方案的丛林中,方案之间竞争的结果主要取决于政策方案本身的有效性和可行性。但在政治的世界中,政策方案的幸存或胜出归根结底取决于政治权力之间的复杂博弈。 As a tool for social governance, good policy options are mainly defined by the two criteria of effectiveness and feasibility. From the two dimensions of validity and feasibility, we can construct a pedigree of the simplified policy scheme. Different policy options are at different locations in this type of pedigree with varying degrees of effectiveness and feasibility. In the jungle of policy options, the result of competition among programs depends largely on the effectiveness and feasibility of the policy options themselves. But in a political world, the survival or victory of a policy plan ultimately depends on the complex game between political powers.