Risk analysis of new maize technology in Zaire: a portfolio approach
使用二次规划模型评估扎伊尔东部地区新玉米技术采用的风险，以及强制棉花生产对传统农户的影响，发现新玉米技术相比本地品种更具风险效率，而强制棉花生产在当前价格和产量水平下不具风险效率。
Risk associated with the adoption of new maize technology and the impact of mandatory cotton production on traditional farmers in the Kasai Oriental Region of Zaire are evaluated within a portfolio context using a quadratic programming model. Seasonal net returns for farm plans including four levels of maize technology in combination with staple food crops are evaluated, with and without mandatory cotton production. The results indicate that cropping systems that include new maize technology are risk-efficient relative to local maize varieties while mandatory cotton production is not risk-efficient at the prevalent price and yield levels in the farming system.