本研究主要探討生技產業公開說明書之風險因子揭露以及首次公開發行(IPO, initial public offering)前之策略聯盟關係對首次公開發行折價所產生之影響。本研究以美國生技產業首次公開發行公司為研究對象，樣本期間為1997年至2012年。 許多文獻指出當初級市場認購人間資訊不對稱程度越大時，IPO價值之事前不確定性(ex ante uncertainty)越高，因此以事前不確定性的概念來衡量資訊不對稱程度，並透過公開說明書中資訊之揭露作為事前不確定性的代理變數以探討其與IPO折價現象之關聯。本研究即利用公開說明書之風險因子揭露作為事前不確定性的代理變數，並預期揭露的數量多寡與內容描述將影響IPO折價。另外，由於文獻指出策略聯盟所傳達的正面訊號，可能有助於生技公司減少因產業特性所造成的不確定性，因此本研究預期生技公司於IPO前擁有策略聯盟關係將影響IPO折價。 本研究參考過去文獻，建立資訊揭露的四級指標加上風險因子所揭露的項目多寡，系統性地衡量生技公司公開說明書之風險因子，並以多元迴歸分析檢測假說。實證結果顯示：風險因子的內容描述越具量化或越具體，IPO折價越大，並且發現大公司之風險因子揭露數量與IPO折價具正向關係，而生技公司於IPO前擁有策略聯盟關係對IPO折價幅度具有顯著負向關係。研究結果顯示公開說明書之風險因子揭露及策略聯盟與事前不確定性所產生之IPO折價現象之關聯性。 / This study investigates whether disclosure of risk factors in the prospectus and the effect of strategic alliances before IPO date will influence underpricing of the biotech firms. Data is collected for biotech companies of U.S IPOs issued from 1997 to 2012 as the research sample. Much literature indicates that the greater is the information asymmetry between different investors, the higher is the ex ante uncertainty about an initial public offering’s value. Hence, the ex ante uncertainty is measured as the degree of asymmetric information. And there are a number of studies that use different measurement as a proxy for ex-ante uncertainty including disclosures in the prospectus to examine its relation to underpricing. This study uses risk factors in the prospectus as a proxy for ex-ante uncertainty and expects that the quantity of risk factors and the content or description of risk factors will influence underpricing. Furthermore, since previous studies consider that strategy alliances convey a positive signal to investors which would reduce the uncertainty from the industrial characteristics of the biotech industry and would mitigate investors’ concern, this study expects that a biotech IPO with strategic alliances before IPO date will affect underpricing. Referring to past literature, this study builds four-class index for disclosure score and uses the number of risk factors to systematically measure risk factors in the prospectus. The empirical results show that a biotech IPO with more quantitative information or some specific information of risk factors will experience higher underpricing. In addition, in larger firms the greater are risk factors disclosed no matter the quantity or the content and its description, the higher is underpricing. And there is a significantly negative relation between strategic alliances before IPO date and underpricing. In conclusion, disclosure of risk factors in the prospectus and the effect of strategic alliances are related to underpricing as expected.

利用1995-2015年間美國房地產投資信託基金（REIT）的176個初次公開發行為樣本，本研究分析了初步公開說明書（Form S-11）資訊與REITs上市後之當天，短期和長期表現之間的關係。其中，本文著重於探討四個特別領域的相關資訊，包括管理結構，承銷商聲譽，IPO閉鎖期及管理團隊品質。 實證結果顯示，初步公開說明書（Form S-11）包含有價值的資訊，有助於REIT IPO 投資人作投資評估之使用。其中，IPO閉鎖期大於等於產業標準180天的REITs，其在上市後6個月和12個月期間的報酬率高於IPO閉鎖期小於180天的REITs。此外，與過去的IPO研究結果相似，由知名承銷商所銷售之REIT IPOs 在初次公開發行後的短期及長期表現平均優於由知名度較低之承銷商所銷售的REIT IPOs。 然而，儘管過去與REIT相關的研究普遍偏好內部管理，本研究之實證結果支持外部管理的模式。其中，實證結果顯示外部管理的REITs在初次公開發行後的短期及長期表現平均優於內部管理的REITs。 / Using a sample of 176 US REIT IPOs from 1995 to 2015, this study examines the relationship between information provided on the preliminary IPO prospectus (form S-11) and post-IPO initial, short-term and long-term performance of REITs. In particular, this paper focuses on information related to four specific areas: management structure, underwriter reputation, lock-up period, and management quality. The findings of this study suggest that form S-11 carries valuable information, and is useful to investors in evaluating REIT IPOs. The regression results indicate that REIT IPOs with a lock-up period that is at least as long as the industry standard, on average, earn higher post-IPO returns 6-month and 12-month following the IPO date. Moreover, consistent with prior IPO studies, offerings underwritten by prestigious underwriters, on average, yield better post-IPO performance than IPOs underwritten by less reputable underwriters. Yet, unlike prior REIT studies, the findings of this paper tend to favor the external management structure. The results from the sub-sample imply externally managed REITs, on average, earn higher post-IPO short-term and long-term returns than their internally managed counterpart.