本研究旨在探討家族公司與非家族公司在財務報表重編及法人說明會上之差異；其次，考慮家族公司本身亦存在差異性，因此進一步將家族公司按其聲譽或誠信之好壞予以分群，以檢測聲譽或誠信較差(好)之公司相較於其他家族公司在財務報表重編及法人說明會上是否具有差異。另外，本研究也探討過去受到高度重視的兩種代理問題（管理階層與股東間的傳統代理問題，控制股東與小股東間的核心代理問題）對於公司財務報表重編及召開法人說明會可能性之相對影響程度。在財務報表重編之衡量上，除了考慮發生重編的可能性外，更進一步衡量重編之嚴重程度。相較於其他家族企業之研究將家族公司視為同一族群，本研究之最大貢獻在於考慮家族公司可能具有聲譽上之異質性，而此一異質性會造成家族公司在財務報表品質及自願性揭露上之差異。本研究有下列發現：(1)相較於非家族公司而言，家族公司發生財務報表重編事件之可能性並未較高，然而誠信或社會觀感較差之家族公司相較於其他家族公司比較容易發生財務報表重編事件；(2)雖然家族公司召開法人說明會可能性較高、召開頻率也較多，然而進一步將家族公司分組後，發現聲譽或誠信較差之家族公司較其他家族公司傾向不召開法人說明會且召開頻率亦較低；(3)當公司存在兩種代理問題時，不論是單獨存在或是同時存在，皆會增加財務報表重編之可能性；(4)單獨存在傳統代理問題並不影響公司自願性揭露之意願，然而當公司採用控制權擴增機制時，則會降低公司召開法人說明會之意願與召開之頻率。

法人說明會為近年來企業最常使用的自願性揭露方式之一，已逐漸成為企業管理當局與投資人溝通的重要管道，然而法人說明會之參加人員通常僅限於法人股東與財務分析師，因此財務分析師在企業管理當局與投資人之間扮演了一個重要的資訊傳遞角色。本研究以台灣高科技產業上市（櫃）公司為研究對象，探討法人說明會資訊揭露之豐富度，對分析師盈餘預測之樂觀程度、預測準確度以及預測離散性之影響，以及不同國籍券商獲取法人說明會資訊對其預測之影響。研究結果發現，分析師在資訊豐富性高的法人說明會後所做的盈餘預測會偏向樂觀預測，亦容易出現樂觀偏誤的現象，且資訊越豐富，分析師盈餘預測之離散性越低。若進一步分析券商國籍對盈餘預測之影響，可以發現本國券商在資訊豐富性高的法人說明會後所做的盈餘預測會偏向樂觀預測，外國券商則無此現象，表示相較於外國券商，本國券商獲取法人說明會資訊對其盈餘預測之影響較大。 / Nowadays,conference calls are one of the most often used voluntary disclosures by firms, and have become an important way of communication between management and investors.However,participants of conference calls are often institutional shareholders and financial analysts.As a result,financial analysts play an important role as an information communicator between management and investors.Based on a sample of publicly listed firms in Taiwan,this study explores whether the extent to which the richness of the content of conference calls affect the optimism,bias and dispersion of financial analysts' earnings forecasts,and whether the nationality of brokers causes different effects when they acquire the information of conference calls.We find that analysts' earnings forecasts become more optimistic and biased if conference calls contain richer information,and the dispersion of forecasts also becomes lower.Furthermore,domestic brokers' forecasts are more optimistic after conference calls which contained rich information,while there is no such phenomenon for foreign brokers.This indicates that conference calls have a greater impact on domestic than foreign brokers in making earnings forecasts.

本文旨在探討投資人情緒與法人說明會之關聯性，即公司如何經由召開法人說明會，策略性地回應投資人情緒反應，以企圖影響情緒所導致的預期偏差。實證發現：管理當局策略性地改變其自願性揭露政策，以反映投資人情緒。當投資人情緒愈低落時，公司將傾向於召開法人說明會，且公司召開法人說明會之頻率亦會增加。相反的，當投資人情緒高昂時，公司則愈不會召開法人說明會。再者，當投資人情緒愈低落時，法人說明會所揭露之公司資訊將愈樂觀。此研究亦顯示公司自願性揭露政策的選擇，反映管理當局渴望維持樂觀之評價。 / In this paper we explore the association between investor sentiment and the likelihood of holding conference calls. In other words, this paper investigates how firms react strategically to investor sentiment via their conference calls in an attempt to influence the sentiment-induced biases in expectations. We show that managers strategically vary their voluntary disclosure policies in response to prevailing sentiment. We find that during low-sentiment periods, the firms are more likely to conduct conference calls and conduct them more frequently; while during periods of high sentiment they decrease the frequency of conference calls. In addition, during low-sentiment periods, the conference calls disclose more optimistic information. Overall, this study provides evidence that company’s voluntary disclosure choices reflect managers desire to maintain optimistic valuations.

法人說明會是公司傳遞內部訊息給外部使用者方法之一，透過法人說明會宣佈財務及非財務資訊，藉以消弭因資訊不對稱所產生之代理問題，亦為分析師作出盈餘預測參考依據之一。在半導體供應鏈中，其上、下游產業間關聯緊密，資訊具有垂直移轉效果，因此，本研究欲探討半導體供應鏈中，下游公司分析師參考上游關聯公司法人說明會資訊並作出盈餘預測調整之程度。 本研究針對國內2005年至2011年半導體上市、櫃公司，進行法人說明會資訊與分析師盈餘預測修正之關聯性。實證結果發現，下游公司財務分析師會參考上游關聯公司召開法人說明會所宣佈之預測財務及非財務資料，並修正對公司之盈餘預測；且供應鏈中，上、下游關係越遠及國籍為外國之分析師，對上游關聯公司法人說明會資訊依賴程度越高，作出的盈餘預測調整幅度越大。

本篇研究試圖探討半導體產業供應鏈上游的IC設計業者召開法人說明會後，基於我國半導體產業供應鏈緊密連結之特性，同屬半導體供應鏈的其他中、下游製造和封測廠之機構投資人的交易行為是否將受到IC設計業者宣告之法人說明會資訊影響，亦即證明法人說明會資訊在半導體供應鏈中是否具有垂直資訊移轉效果。實證結果發現在法人說明會召開訊息首次見報日時，供應鏈上游公司之法人說明會訊息確實會影響其中、下游公司之機構投資人的持股變化，於宣告好(壞)消息時買進(賣出)，顯示機構投資人藉由其專業團隊和私有資訊能早一般大眾提前調整其交易策略，而此資訊移轉效果也會隨著公司在供應鏈上之距離而逐漸稀釋。此外，結果亦顯示外資由於地緣限制，相較於投信和自營商更會倚賴法人說明會宣告之資訊調整其持股策略，於宣告好(壞)消息時買進(賣出)。 / This research examine the conference call which hold by the IC design companies will transfer useful information to the institutional investors of IC manufacturing and packaging companies in the supply chain downstream. I am interested in if there is a vertical information transfer in the semi-conduct industry. The empirical results show that the conference call information is significantly influence the holding percentage of the institutional investors of the downstream supply chain companies after the information of conference call first reported in the newspapers. The institutional investors will increase the holding percentage after the good news released and vice versa. It is showed that the institutional investors can gather more information before the conference call and adjust their invest strategy in advance. Furthermore, this vertical information transfer effect will dilute by degrees as distance increases. Lastly, the result also shows that the foreign institutional investors more rely on the information released from the conference call to adjust their invest strategy than native institutional investors.

本研究主要探討台灣半導體產業供應鏈上游公司召開法人說明會是否會影響中下游公司之股價。本研究將法人說明會公布之資訊區分為財務資訊及非財務資訊，除探討財務資訊對供應鏈中、下游公司股價是否具影響效果外，亦探討財務及非財務的法人說明會資訊是否具有增額效果。實證結果顯示財務資訊在法人說明會召開前後一天與累積異常報酬呈現顯著正向關係，但非財務資訊卻呈現顯著反向關係，顯示非財務資訊會修正財務資訊所造成之效果。另外，資訊於供應鏈中移轉之距離越長，則移轉效果會越小，但若單純為好消息或壞消息，則移轉效果將增強。 / This research examines the influence of conference call information on the stock price of supply chain partners. The semi-conductor industries in Taiwan were used in this paper to examine the issue. I examined two kinds of information disclosed from conference calls: financial information and non-financial information. I first examined the information contained in conference calls for any effects on supply chain partners. Furthermore, I also examined to see if the non-financial information contains any additional effects to the supply chain partners. The empirical results show that the accumulated abnormal return of the supply chain partners is significantly positive related to the financial information around the conference call date. The accumulated abnormal return of the supply chain partners is significantly negative related to the non-financial information around the conference call date. The results show that both financial and non-financial information would influence the accumulated abnormal return of supply chain partners. The non-financial information contains additional information that revises the influence of the financial information.