Despite their great popularity, the conventional Divisia productivity indexes all ignore undesirable outputs. The purpose of this study is to Â…fill in this gap by proposing a primal Divisia-type productivity index that is valid in the presence of undesirable outputs. The new productivity...

In this paper we build on work by Gallant and Golub (1984), Diewert and Wales (1987), and Barnett (2002) and provide a comparison among three different methods of imposing theoretical regularity on flexible functional forms - reparameterization using Cholesky factorization, constrained...