With perfect capital markets, what is the market price per share of Luther's stock after the share repurchase?

Given the multiple regression equation, ? = a+b1X1+b2X2, and the bivariate equation ? = a+bX1, why is the partial regression coefficient, b1,different from the regression coefficient, b, obtained by regressing Y on only X1?

What will be an ideal response?

An example is:

a. abstract b. concrete c. both of the above d. none of the above