中文摘要：

发展战略性新兴产业已成为转变经济发展方式和推动产业转型与升级的重要环节。战略性新兴产业具有新兴产业特征和战略性产业特征，并且面临产能过剩、无序竞争等问题，因而战略性新兴产业是否具有规模效应，成为该产业能否由幼稚期和成长期过渡到成熟期，并最终成长为支柱性产业的关键。本文利用A股市场的战略性新兴产业上市公司数据，从产业整体、产业分类、政策支持和产权性质的层面分别研究了战略性新兴产业的规模效应。研究结果表明，虽然战略性新兴产业整体呈现显著的规模效应，但是基于七大产业的研究揭示出，部分产业规模效应不显著，甚至呈现规模不经济；政策支持对战略性新兴产业的规模效应的作用是显著的；在产权性质方面，国有企业规模效应不显著，而非国有企业规模效应显著。

英文摘要：

The development of strategic emerging industries can help to transform the economic development mode and promote industrial upgrading. Strategic emerging industries have the features of emerging industry and strategic industry, and face excess capacity, disorderly competition and other issues, so whether strategic emerging industries having the scale economies becomes very important. The scale economies can help to transform the strategic emerging industries from the infant stage or growth stage to maturity stage, and eventually make the strategic emerging industries become the main industries. In this paper, using the listed companies data in A-share market, we analyze the scale economies of strategic emerging industries based on the whole industry, industrial classification, policy support and nature of property rights. The results show that although the overall strategic emerging industries show significant scale economies, but based on the research of industrial classi- fication, it reveals that the scale economies of some industries are not significant, even scale diseconomies. The policy support has the significant effect on scale economies of strategic emerging industries. The scale economies of state-owned enterprises in strategic emerging industries are not significant, but non-state-owned enterprises have significant scale economies.