This study surveys the theoretical literature dealing with the behavior of technology suppliers in the presence of network externalities with a focus on economies of compatibility setting and promotional pricing. Positive network externalities arise when a good is more valuable to a user because more users adopt the same good or compatible ones. There are two issues with network externalities: demand side and supply side. This paper focuses on the supply side, and it relates the way that technologies are chosen and promoted. On the supply side, product compatibility choice, technology sponsorship, penetration pricing, and product pre-announcement are the competing strategies of firms operating in a market with network externalities. Among these strategies, compatibility choice decisions and promotional pricing are presented in the two different subsections, which follows. / Master of Arts

Visa是全球第一大的國際支付卡組織，然其自1970年成立至今，不過短短30年，這之間組織成長的速度令人驚嘆，但由從前組織成長理論似乎無法解釋其中所隱含的經濟意義，因此本研究嘗試以新經濟現象中的網路外部性理論來觀察解釋Visa組織成長的過程-隨著使用者的增加，整個系統的價值也隨之增加，且在不斷的循環自我增強下，整個系統呈現非線性的快速成長。 此外，Visa組織的創辦者Dee Hock(1998)在「亂序」一書中提及Visa是個亂序（處於混亂和秩序之間）的組織，因此本研究亦由混沌理論的觀點觀察Visa組織的運作方式，瞭解其是如何進行自我組織、自我成長、自我演化，又這樣一個龐大的價值交換體系，在快速成長擴充的過程中又是如何管理運作的。 最後，本研究就網路外部性和混沌理論觀點下所觀察到的現象進行進一步之比較探討，找出其中相關之處，觀察兩者間是否有互相強化之關連，發覺Visa此一混沌邊緣組織的運作方式強化了其網路外部性的效果，也更加造就了Visa的成功。

This paper proposed a revised technology acceptance model for measuring end user computing (EUC) acceptance. An empirical study was conducted to collect data and the revised model was evaluated by structural equation modeling, and then confirmatory factor analysis was applied to test if the empirical data confirmed to the presumed model. The results demonstrated that the model explained 56% of the variance. The finding contributes to an expanded understanding of the factors that promote the EUC acceptance.

Conn., Yale Univ., Diss.--New Haven, 2005. / Kopie, ersch. im Verl. UMI, Ann Arbor, Mich. - Enth. 3 Beitr.

School of Economics, Diss.--Helsinki, 2006. / Enth. 8 Beitr.

Univ., Diss.--Stuttgart, 2005.

Univ., Diss.--München, 2002.

Univ., Diss.--Osnabrück, 1999.

Diss. : / Myös verkkojulkaisuna ISBN 978-952-10-4827-2 (PDF).

The prolific use of social media tools such as blogs and wikis is leading several organizations to adopt these tools. However, success of social media depends on its use by employees to share and seek knowledge. Based on a unique data set obtained from a large multi-national corporation, I examined three different aspects of knowledge seeking and sharing. First, I investigated two-sided network externalities on seeking and sharing. My analysis shows that significant network externalities occur not only at the demand side, which has been the primary focus in prior literature, but also at the supply as well as cross-sides (from supply to demand as well as from demand to supply). Second, I also explored the impact of hierarchical and geographical distribution on knowledge seeking and sharing. My results show that how a firm is structurally organized can yield different influences on the use of corporate social media based on whether the employee is seeking or sharing. Finally, I investigated the impact of social capital. New insights are captured in how different dimensions of social capital influence employee use of corporate social media for seeking and sharing knowledge within the organization. / Business Administration/Management Information Systems