已故的自由经济学前辈夏道平先生曾把通常被称为经济学家的那群人，就其思想言论的底蕴分成三类，一是真正的经济学家，二是经济工程师，三是特定经济利益的代言人。他说这三种人都同样在使用经济学的一些名词、术语和某些模型，外行人看到他们发表的文章都在讨论经济问题，很 The late free economics predecessor, Mr. Xia Dao-peng, once divided the group of people usually called economists into three categories of his thoughts and opinions. One is the real economist, the other is the economic engineer, and the third is the specific economy Spokesman of interest. He said all three people are also using some of the same nouns, terms and some models of economics as laymen see their published articles discussing economic issues.