In this paper we test the hypothesis of a wage curve against a Phillips curve for Spain within a framework which allos for these both and more general alternatives. To this end, we use data from the European Community Household Panel, which provides micro-information for the period 1994-2001....

We describe the minimum volume simplex enclosure problem (MVSEP), which is known to be a global optimization problem, and further investigate its multimodality. The problem is a basis for several (unmixing) methods that estimate so-called endmembers and fractional values in a linear mixing...