A great deal of attention has been devoted in the last two decades to assessing the economic consequences of agricultural research. The biotechnology revolution (see, for example, Hueth and Just, 1986; Kalter and Tauer, 1986) may provide a further stimulus to study of the size and distribution of...

Productivity often increases in a part of an industry while remaining unchanged in the rest of the industry. In assessing the social gain from a productivity increase in a part of an industry producing a tradeable commodity it is necessary to consider the relationships between the part of the...