亚当·斯密创建古典经济学时，将其定义为“研究国民财富（或商品总量）的科学”。后来，庸俗经济学的创始人萨伊首先将这一研究对象具体化为财富的生产、分配和消费的研究。萨级尔逊在他的《经济学》里，把经济学或政治经济学的研究对象列了七种，其中为经济学者们公认的一条 When Adam Smith created classical economics, he defined it as “the science that studies the national wealth (or the total amount of commodities).” Later, the founder of vulgar economics Say first embodied this research object into research on the production, distribution and consumption of wealth. In his “Economics,” Saleselson listed seven subjects of study in economics or political economy, one of which is universally recognized by economists