Standardizing the information disclosure behavior of listed companies is an effective measure to ensure a smooth and orderly operation of the securities market and guarantee the investors’ interests. Research shows that company management manipulate the language information disclosure based on impression management and other purposes. Self-serving attribution is a typical representative when management explains the performance, which influence investors’ decisions. It’s a worthy issue to study that how to strengthen supervision of performance attribution information and improve the quality of disclosure. This thesis analyses necessity and feasibility of CPA provide assurance for the performance attribution information, and structure the framework of our country implements the performance attribution information assurance system. The thesis is significant to improving the quality of operating performance attribution information disclosure of listed company.The thesis adopts the theoretic analysis and the practical analysis. The thesis analyses necessity and feasibility of auditors provide assurance for the performance attribution information based on the theories analysis define the relative concepts and introduce the theories of principal-agent, proposing the establishment of assurance system in China, including the overall standard, development strategy and implementation. The experiments are carried out among 180 graduate students in accounting in which 2×2 mixed design is adopted, investigating the relationship between the investors’ reaction and the assurance report for operating performance attribution information is provided or not in different operating performance attribution types. Furthermore, the experiments validate the influence that the assurance report for operating performance attribution information to the investor’s decision. The experiments are divided into digital group and poor group according to the performance, using independent sample T-test to the results of questionnaire, drawing a conclusion that there are significant differences in satisfaction for management, performance expectation and purchase or sold, which illustrate that these decisions are subject to the impact of the assurance report, and the investors have a positive attitude to this assurance service. |