By reviewing the existing literatures , the author finds that there are still many limitations and even vacuities , including theory framework , research methods and measurement of related variables .
通过文献分析后发现，现有多元化发展战略与企业价值关系研究仍然存在诸多局限性乃至空白性，包括理论框架、研究方法与变量测度指标体系等方面。
vacuities