企業多角化對財稅差異之影響

The Effect of Corporate Diversification on the Book-Tax Differences

本研究目的在於探討企業的多角化發展對財稅差異可能產生的影響。本研究將企業的多角化策略區分為產業多角化與跨國多角化。過去研究發現財稅差異可反映企業之盈餘管理與積極租稅規劃等行為，而Jiraporn, Kim, and Mathu（2008）、姜家訓與葉鴻銘（2008）實證發現產業多角化為會抑制企業盈餘管理行為，故本研究預期有進行產業多角化的公司會有較低的財稅差異。另外，本研究推論因有進行跨國多角化之企業較易誘發其盈餘管理行為（姜家訓與葉鴻銘，2008），再加上跨國多角化之企業較易進行積極租稅規劃行為（陳明進與蔡麗雯，2006），此皆會導致財稅差異擴大，預期有進行跨國多角化的企業會有較高的財稅差異。本研究以1999年至2014年之台灣上市（櫃）企業為樣本，實證結果支持本研究之預期。本研究之潛在貢獻在於提出產業多角化與跨國多角化兩項會影響財稅差異之因子。 The purpose of this study was to investigate the influence of corporate diversification on book-tax differences (hereafter, BTD). The corporate diversification in this study is an indication of industrial and global diversification. Previous studies reported that BTD could be used to detect managerial behavior of earnings management/tax management. Jiraporn et al. (2008), and Jiang and Yeh (2008) also reported that industrial diversification could mitigate earnings management. Thus, in this study, we predicted that there would be a negative relationship between BTD and the degree of industrial diversification. Jiang and Yeh (2008), and Chen and Tsai (2006) also showed that firms with greater global diversification are more likely to engage in earnings management and tax management, which would increase BTD. The sample of this study comprised firms listed on the TSE/OTC in Taiwan between 1999 and 2014. Our empirical results support our predictions. The contribution of this study is to extend our understanding of the determinants of BTD.