ABSTRACT
Studies of long run time series properties of commodity price series in the 20th century have been dominated by attempts to test and quantify the impact of secular negative trends in the barter terms of trade. This chapter will review the evidence on secular trends in conventional barter terms of trade series before proceeding to a discussion of barter terms of trade movements from 1980 onward. A number of alternative barter terms of trade concepts will be considered in this context and their analysis will be juxtaposed to estimates of income terms of trade developments.
