英文文献：Importance Of Various Roles And Evaluation Methods Of Extension Economists As Viewed By Extension Administrators, Department Heads, And Specialists-延伸管理人员、部门主管和专家认为的延伸经济学家的各种角色的重要性和评价方法
英文文献作者：Ward, Ruby A.,Bailey, DeeVon,Godfrey, E. Bruce
英文文献摘要：
A survey of extension administrators, department heads, and extension specialists was conducted to determine the best methods for evaluating the performance of extension economists. The results demonstrate how different groups view the relative importance of the various roles played by extension economists and how important the specific attributes of extension economists are within each role. In general all three groups agree on the most important roles and attributes. However, important differences among the groups do exist about the relative importance of certain activities.

调查了推广管理人员、部门主管和推广专家，以确定评价推广经济学家业绩的最佳方法。结果显示了不同的群体如何看待延伸经济学家所扮演的不同角色的相对重要性，以及延伸经济学家的特定属性在每个角色中的重要性。总的来说，这三个组都同意最重要的角色和属性。然而，在某些活动的相对重要性方面，群体之间确实存在重要的差异。