How could an investor identify the best of a set of efficient portfolios of common stocks? 投资者如何能够辨别出普通股有效投资组合集中最优的那个?
In addition, centered ownership structure neither constrains overinvestment nor promotes the effective investment in non-state-holding enterprises. 此外,居中的股权结构既不能抑制非国有控股企业过度投资,又不能促进企业有效投资。