He earned graduate degrees in agricultural economics from Purdue University.

他在普渡大学获得农业经济学研究生学位。

Regenerative products could be a hard sell, because the concept is tough to define quickly, says Julie Stanton, associate professor of agricultural economics at Pennsylvania State University Brandywine.

宾夕法尼亚州立大学布兰迪温分校农业经济学副教授朱莉·斯坦顿说，再生产品可能很难销售，因为这一概念很难迅速定义。

" The Ukrainian-Russian export supply is so important that even without the drought, France would not be able to replace that, " says Omar Bessaoud, a professor of agricultural economics at CIHEAM-Montpellier.

国际地中海高级农艺研究中心（CIHEAM）蒙彼利埃研究所的农业经济学教授奥马尔·贝萨乌德表示：“乌克兰和俄罗斯的出口供应非常重要，即使没有旱灾，法国也无法取代这种供应。”