Some hypotheses about the timing of farmers becoming aware of an innovation and the subsequent decision to use that innovation are derived from a recently developed, decision-theoretic model of the adoption process. They are tested using empirical evidence on the time taken by early adopters of...

This paper explains why various formulae used in the literature to calculate level and distribution of annual research benefits yield different results. After reviewing the differences in assumptions used by different authors to develop their respective formulae, the paper concludes by...