I wonder, Pablo, how the theory associated with the concept of the 
"accelerator" warrants being called a "principle?" Does the use of 
this word imply (1) that an increase in real investment always 
follows an increase in real GDP and/or (2) that the new real 
investment made by businesspeople who use the method of statistically 
extrapolating past growth into the future is profitable?

If not, would it be better to call this the "accelerator hypothesis?"

Pat Gunning