This article first reviews the well-known nonparametric methods of decomposing productivity growth and finally argue that Färe et al. (1994)’s method of computing productivity growth is superior in spite of the fact that this model model is based on convexity postulate, which assumes away...

The factor X in the RPI-X regulation aims to adjust price or revenue allowances to changes in total factor productivity and input prices. A cost Malmquist index can be applied to determine the efficient cost change (ECC). However, regulators typically do not have the necessary data on input...