海尔布罗纳(Heilbroner)在七十年代时发表了五篇题为“从资本主义到社会主义”的文章,这些文章对研究社会主义趋向的每一位学者来说,是特别感兴趣的。海尔布罗纳用“企业”一词来表示非农业的企业或城市企业(但没有给它下确切的定义)。他强调说,“1920年到1970年期间,社会内部的企业范围有了迅猛的扩大。近50多年来,政府所办的企业的范围也有了同样显著的扩大”。事实上,从1820年到1920年,美国的私人企业,从相对的比例来看,并没有什么发展。相反,在整个这段时间中,政府办的企业,其相对比例却有所增加,尽管在速度上没有 Heilbroner published in the seventies five articles entitled “From Capitalism to Socialism”, which are of particular interest to every scholar studying the tendencies of socialism. Hebroner uses the term “firm” to denote non-agricultural or urban firms (but does not give it a precise definition). He emphasized that “the scope of enterprises within the society has expanded rapidly from 1920 to 1970. The scope of the government-run enterprises has also been remarkably expanded in the past 50 years.” In fact, from 1820 to 1920, the private enterprises in the United States, from the relative proportions, saw no significant development. On the contrary, the relative proportion of government-run enterprises has increased over this period of time, albeit at a faster pace