The objective of this paper is to examine empiri- cally the determinants of the joint decision whether or not to adopt a new input and invest in technical knowledge. A log-linear probability model of the joint occurrence or nonoc- currence of adoption and information acquisition is estimated. The results suggest that information acquisition and adoption decisions are made jointly, and that the influences of the determinants of adoption and information acquisition differ with the timing of adoption and the channels of information dissemination.