This paper applies Varian's(1982,1983) non-parametric tests to obtain weakly separable monetary assets for aggregation. Using annual data (1970-1996) it was found that the official monetary aggregates M2, M3 and M4 are theoretically admissible. Some new separable groups were also obtained in the...

In the nonparametric data envelopment analysis literature, scale elasticity is evaluated in two alternative ways: using either the technical efficiency model or the cost efficiency model. This evaluation becomes problematic in several situations, for example (a) when input proportions change in...