Introduction to Quantitative Analysis:Reflect on Working Papers and Modeling Contest

We study the phenomenon of multi-solution in the quantitative analysis and find some probable reasons,such as the context of the conclusion(scale),lacking of random,building a wrong model.We focus on the wrong model,which lead to the produce of the whole essay.(a) the keys to modeling;(b) the significant of the theory and logistics.At last,we make some conclusions and suggestions.