本研究使用Ohlson評價模型與Easton and Harris報酬模型,探討2000年至2010年國內上市(櫃)公司合併財務報表被出具分攤式意見或標準式無保留意見之價值攸關性;並深入探討分攤比例之大小是否亦影響投資人之決策,另探究四大會計師事務所與非四大會計師事務所查核下所出具之分攤式意見與標準式無保留意見之價值攸關性。實證結果發現,分攤式意見與標準式無保留意見之價值攸關性明顯不同,顯示投資人會將分攤式意見之發布列為投資時之考量;分攤比例愈大,愈可能容易讓投資人對於該財務報表之查核產生疑慮,因而造成股價或股票報酬率愈低;並且,由四大會計師事務所查核並發布分攤式意見之價值攸關性亦有別於標準式無保留意見。
Using price model and return model, the purpose of this study is to investigate whether shared audit opinion affects the value relevance of accounting numbers. This study applies data from companies listed in Taiwan Stock Exchange or traded Over-the-Counter, and focuses on consolidated financial statement for the period from 2000 to 2010. We find that the positive association between earnings and stock returns decreases when shared audit opinion is issued. Furthermore, shared audit opinion, especially those issued by Big 4 CPA firms enhances the value relevance of accounting numbers. Our result also proves that investors’ perception of shared audit opinion issued has changed.