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.
