The estimation of production functions suffers from an unresolved identification problem caused by flexible inputs, such as intermediate inputs. We develop an identification strategy for production functions based on a transformation of the firm's short-run first order condition that solves the...

Output gaps for ten European countries and the USA are estimated based on a CES production function with input augmentation in the technological progress. The substitution parameter is estimated from the coefficients of the labor and capital demand functions. The estimation is done using...