题目
An analyst is investigating the relationship between the annual growth in consumer spending (CONS) in a country and the annual growth in the country’s GDP (GGDP). The analyst estimates the following two models:「huixue_img/importSubject/1564548697075879936.png」Which of following statement about the functional form used in these models are correct?
选项
A.Model 2 is the simple linear regression with no variable transformation, whereas Model 1 is a lin-log model with the natural log of the variable CONS as the independent variable.
B.Model 1 is the simple linear regression with no variable transformation,\nwhereas Model 2 is a lin-log\nmodel with the natural log of the variable\nCONS as the independent variable.
C.Model 1 is the simple linear regression with no variable transformation, whereas Model 2 is a Log-log model with the natural log of the variable CONS as the independent variable.
答案
B
解析
B is correct. Model 1 is the simple linear regression with no variable transformation,whereas Model 2 is a lin-logmodel with the natural log of the variableCONS as the independent variable.这道题目说：An analyst is investigating the relationship between the annual growth in consumer spending (CONS) in a country and the annual growth in the country’s GDP (GGDP). The analyst estimates the following two models:所以GGDP就是因变量Y，CONS是自变量X。第一个模型是Y和X直接做回归，所以就属于普通的单元回归(simple linear regression)。而第二个模型是Y(GGDP）不变，用ln（CONS）作为自变量，也就是用Y和ln X回归，属于Lin-log model。前面的lin表示Y不变，-后面的log表示X要取对数。所以这题选b