文章基本信息

标题：Factors that Determine Aflatoxin Infestation in Ghana: Application of Cragg's Double Hurdle Model
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作者：Prince Maxwell Etwire ; Edward Martey
期刊名称：Sustainable Futures
印刷版ISSN：2666-1888
出版年度：2020
卷号：2
页码：100021
语种：English
出版社：Elsevier
摘要：In our application of Cragg's (double hurdle) model, we explicitly address functional form misspecification by first using nonparametric regression to identify the functional relationship between aflatoxin infestation and a vector of agronomic and socioeconomic variables. Based on the established functional forms, we then apply Cragg's model to estimate the determinants of farm-level aflatoxin infestation. As expected, we find that aflatoxin infestation in northern Ghana is determined by pre-production and post-production factors. However, we estimate insignificant effects for farmer characteristics. An assessment of the importance of functional form shows that an inappropriate function can lead to biased estimates of the Cragg model.