分段回归 meaning in English

piecewise regression
stepwise regression

As long as f statistical value constructed by sectional regression exceeds the given critical value , structural change happens . the critical value is exactly the structural change point and the study on this point just constitutes the structural change problem . the further study on this problem is accompanied by the development of the unit root and cointegration theory
Chow提出，只要由分段回归而构造的f统计量超过了给定的临界值，就认为发生了结构变化，而发生结构变化的临界点就是结构突变点，对结构突变点的研究就构成了结构突变问题，结构突变问题随着单位根和协整理论的发展而被得到深入研究。