求翻译：La Porta等在一系列相关的实证研究中发现:(1）在投资者保护较强的国家,如源于英美等普通法系的国家,金融市场相对更发达，公司也更多地依赖外部市场进行融资(La Porta et al,1997, 1998)是什么意思？

La Porta, found in the related series of empirical research: (1) in countries with stronger investor protection, such as originating from common law countries such as Britain and the United States, relatively more developed financial markets, the company also rely more on external markets for financing (La Porta et al,1997, 1998)