When Estimating a Short-Run Production Function of the Form $Q = A L ^ { 3 } + B L ^ { 2 }$

Multiple Choice

When estimating a short-run production function of the form $Q = A L ^ { 3 } + B L ^ { 2 }$ ,it is necessary to specify in the computer routine that

A) A < 0.
B) B > 0.
C) the intercept term is forced to equal zero.
D) a and b
E) all of the above