The following log-linear demand curve for a price-setting firm is estimated using the ordinary least-squares method: Q = a P^bM^cP_R^d

Following are the results of this estimation:

DEPENDENT VARIABLE: In Q R-SQUARE F-RATIO P-VALUE ON F OBSERVATIONS: 75 0.7902 89.165 0.0001 PARAMETER STANDARD VARIABLE ESTIMATE ERROR T-RATIO P-VALUE INTERCEPT 6.91 2.76 2.50 0.0146 In P -0.86 0.42 -2.05 0.0443 In M -0.75 0.22 -3.41 0.0011 In PR -1.15 0.75 -1.53 0.1296