AN APPLICATION OF BASS'S MODEL IN THE ANALYSIS OF DIFFUSION OF COCOA‐SPRAYING CHEMICALS AMONG NIGERIAN COCOA FARMERS
研究了Bass模型在尼日利亚可可农采用喷洒化学药剂过程中的适用性，发现该模型虽拟合良好，但相比标准扩散模型改进有限。
Several studies on the process of diffusion of agricultural innovations have recently emerged in the literature. They serve as an important link between studies on the establishment of innovations and those in their impact on the economy. However, previous standard diffusion models used in the analysis of diffusion of agricultural innovations assume that the population of potential adopters is identical and that they are all imitators. This assumption may not be realistic in all cases. Hence, it is argued, in this study, that the population of potential adopters is not identical but consists of both innovators and imitators, and a model incorporating the two categories of potential adopters is employed. This model is also assessed against the standard diffusion model to test its superiority. Although the data on the diffusion of cocoa‐spraying chemicals among Nigerian cocoa farmers fit the model well, the result of its statistical evaluation shows little or no improvement over the standard model. This may, however, be due to the nature and composition of the data employed and the need for further refinement of the model.