Based on the traditional statistical evaluation,this article provides a new method to deal with the multi states of the indices in terms of fuzzy math.Furthermore, it proves that the net evaluation module is more accurate than the traditional layer evaluation module.
Traditionally,the study of stratified sampling is concerned with the optimal allocation of sample,but only one item is involved in.This article tries to discuss the case of multi\|item sampling and presents a primary resolution by means of Non\|linear Programming.
Theoretically,the Pigou Tax is one of most important countermeasures to correct market’s externality,however it is not well-accepted in practice yet.This article analyses externality diffusion brought from tax shifting; thereafter,it constructs a statistical model to determine optimal tax distribution among sectors in national economy.
