NO.PZ202001080100003801
问题如下:
a. What additional model would you estimate to implement the Chow test?
选项:
解释:
The original model is Yi=α+βSlnSALESi+βBBTMi+βEEBITDAi+βPNetPPEi+ϵi. The Chow test allows the slope coefficient to vary in the energy industry, so that the extended model is
Yi=α+βSlnSALESi+βBBTMi+βEEBITDAi+βPNetPPEi+γSIEnergy∗lnSALESi+γBIEnergy∗BTMi+γEIEnergy∗EBITDAi+γPIEnergy∗NetPPTi+ϵi.
where IEnergy is a dummy that takes the value 1 if a firm is in the energy industry.
请问chow test是什么?谢谢老师