If only the technical inefficiency leads to economic inefficiency,the explicit expression of economic efficiency and allocative efficiency can be obtained by the self-dual property of Cobb-Douglas production function.

• 本文在假设经济无效完全是由技术无效造成的前提下；利用Cobb-Douglas生产函数与成本函数的自对偶性；通过分析Cobb-Douglas型技术效率与经济效率之间的关系；得到了分配效率的测算公式.