中文摘要：

信号传递是企业市场价值得以实现的重要途径。本文基于自愿性内部控制鉴证报告披露的视角，从政治关联与政府干预两方面研究外部制度因素对民营企业信号传递的影响。研究发现，政治关联对民营企业自愿披露内部控制鉴证报告的信号传递行为具有积极影响；政治关联的方式和政府背景对内部控制鉴证报告披露的影响程度存在差异。政府干预环境抑制民营企业自愿披露内部控制鉴证报告的信号传递行为；同时政府干预环境加剧了政治关联对内部控制鉴证报告披露的影响。结论表明，研究政治关联与政府干预环境对民营企业信号传递动机与行为的影响，对我国证券监管部门制定相关政策具有一定的启示意义。

英文摘要：

Signal transmission is the important way to achieve the enterprise market value. In this paper, from the perspective of internal control attestation report disclosure, we make an analy- sis on the impact of political connections and government interventions on signal transmission of pri- vate listed companies. It shows that the political connections have a positive impact on the voluntary disclosure of internal control attestation report; the effect of political connection ways and govern- ment background on internal control attestation report is different. Government interventions hinder the voluntary disclosure of internal control attestation report. Meanwhile, government interventions intensify the effect of political connections on internal control attestation report. It concludes that research on the effect of political connections and governmental intervention on signal transmission motivation and behavior of private corporate has an inspired meaning for securities supervision sec- tors to lay down the related policies.