(* PS3.2, using DATA3-1, for Section 3.6 on changing units *)
ols price 0 sqft 
(* price in dollars *)		
genr price2 = price*1000
(* estimate new model *)	
ols price2 0 sqft 
(* sqft in hundredths *)	
genr sqft2 = sqft/100
(* estimate new model *)	
ols price 0 sqft2 
(* both units changed *)	
ols price2 0 sqft2 
