财政主体是财政学理论的基本问题。

The question of fiscal subject is the basic issue of financial theory.

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内容提要： 公共品是否是商品，是否存在市场，是当前公共财政学、公共经济学中的核心问题之一，我国经济学理论界对此问题大多持否定态度。

Summary: whether public goods are goods, the existence of the market, the current public finance, public economics, one of the key issues, China's economic theory on this sector are mostly negative.

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