Koebel, Bertrand; Falk, Martin; Laisney, Francois - In: Journal of Business & Economic Statistics 21 (2003) 2, pp. 319-35
We present a new method for imposing and testing concavity of cost functions using asymptotic least squares, which can be easily implemented even for nonlinear cost functions. We provide an illustration for a (generalized) Box-Cox cost function with six inputs: capital, labor disaggregated in...