The marxian theories of value and exploitation axiomatised

The empirical claim made by the marxian theory of value may be made explicit by means of a set-theoretical axiomatisation. The axiomatised theory is seen to be testable, though to have a low degree of testability. The extent to which the theory of exploitation succeeds in revealing an exploitation which would otherwise be concealed is doubtful. The theory of value may be severely tested only by comparing its predictions, if any, with the facts.     

On Estimating Internal Migration for Open Populations

The purpose of this note is to review the case for using the forward census survival ratio (FCSR) method for estimating internal migration. Though this technique seems likely, on certain criteria, to offer usable estimates of migration, it suffers from what some critics regard as a crucial weakness, namely a sensitivity to international migration. It is argued here, however, that this deficiency is less damaging than others have made it out to be. Consequently, a case can be made for preferring the FCSR method to other methods.