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文章认为,有效需求“足”与“不足”的参照系应该是“潜在需求”。当有效需求显著小于潜在需求时,有效需求不足的前提存在,IS-LM模型的结论成立,衍生的积极经济政策有效。同时,文章对“潜在需求”做了初步界定,并从逻辑的和历史的角度做了纵向和横向两个维度示范效应的讨论。最后,文章的判断是,对于一个需求约束型经济态势下的国家来说,或负增长严重、或国内基尼系数较大、或与先进国家经济发展水平差距较大,潜在需求才显著大于有效需求,积极经济政策方能有效。
The article argues that the frame of reference for effective demand “foot ” and “deficit ” should be “potential demand ”. When the effective demand is significantly less than the potential demand, the premise of the insufficient effective demand exists. The conclusion of the IS-LM model holds that the derived positive economic policy is effective. At the same time, the article made a preliminary definition of “potential demand ”, and made a discussion of demonstration effects in both vertical and horizontal dimensions from the perspective of logic and history. Finally, the article’s judgment is that for a country under a demand-constrained economy, or if the negative growth is serious or the domestic Gini coefficient is large or there is a large gap between the economic development level of advanced countries, the potential demand is significantly greater than the effective demand. Positive economic policies can only be effective.