3-2 1 Regression Regression is probably the single most important tool at the econometricians disposal. What is regression analysis It is concerned with describing and evaluating the relationship between a given variable (usually called the dependent variable) and one or more other variables ( usually known as the independent variable(s). 回归是试图用自变量的变动来解释因变量的变化。3-2 1 Regression • Regression is probably the single most important tool at the econometrician’s disposal. What is regression analysis? • It is concerned with describing and evaluating the relationship between a given variable (usually called the dependent variable) and one or more other variables (usually known as the independent variable(s)). • 回归是试图用自变量的变动来解释因变量的变化