V#21 Logarithmic functions of Y and/or X
Channel: Zahid Asghar
Date: 20/10/2020

Case Population regression function
I.    linear-log Yi = 0 + 1ln(Xi) + ui
II.   log-linear ln(Yi) = 0 + 1Xi + ui
III.  log-log ln(Yi) = 0 + 1ln(Xi) + ui
• The interpretation of the slope coefficient differs in each case.
• The interpretation is found by applying the general “before and after” rule: “figure out the change in Y for a given change in X.”