本研究利用1970年至2014年之美國公司為樣本探討公司之成長性是否會影響公司之股利政策。實證結果與股利訊號理論相符，公司會利用現金股利之發放降低公司與外部投資者間的資訊不對稱，以達到較低的股東權益成本。然而，當面對較高不確定性時，高成長公司之股東權益成本較高，因此較不會發放股利。本研究亦發現發放股利之高成長公司相較發放股利之低成長公司於未來有較好的營運績效，代表高成長公司發放股利有較好的訊號理論效果。而市場能夠有效率地反應較好的訊號理論於公司股價上。 / The main purpose of this study is to investigate how the corporate growth affects the corporate payout policy. Using U.S. firms during 1970 to 2014 as the sample, we demonstrate that, consistent with signaling hypothesis, firms tend to pay dividends to reduce the information asymmetry, and therefore the cost of equity will be lower. However, considering the higher cost of equity, high growth firms will not pay dividends if they face higher uncertainty. We also find a better future operating performance for high growth firms paying dividends, indicating a good signaling occurs when high growth firms pay dividends. The market is efficient enough to give a price appreciation for those good signaling firms.