In the past, linear regression method was primarily used to study the relationship between credit funds, which is invested by financial institutions, and economic growth. But such issues are ignored as whether relations between the two are fixed and whether the effect of the investment of credit funds on the increase of economy is symmetric. In this paper, we use non-linear STR model to analyze the relationship between the two, choose the ESTR model to make regression analysis after a variety of hypothesis testing, then got the non-linear relat...
