“早期的宏观经济学家是工程师,试图解决实际问题,更晚近些的宏观经济学家们则专注于开发分析工具和建立理论原则。然而,这些工具和原则在经世济用一途却进展迟缓。随着宏观经济学的演进,一个不断重复的主题是科学家与工程师之间的互动——此种互动有时富有成效,有时则不然。”曼昆(N.Gregory Mankiw)在其2006年宏文《作为科学家和工程师的宏观经济学家》(The Macroeconomist Early macroeconomists were engineers, trying to solve practical problems, and more recently macroeconomists focused on developing analytical tools and establishing theoretical principles. However, these tools and principles were progressing economically Slowly, with the evolution of macroeconomics, a recurring theme is the interaction between scientists and engineers - sometimes productive and sometimes ineffective. "N. Reggie Mankiw, in his 2006 Macroeconomics as a Macroeconomist for Scientists and Engineers