Risk and return of information technology initiatives: Evidence from electronic commerce announcements

• 成果类型: Article
• 署名作者: Dewan, Sanjeev; Ren, Fei
• 署名单位: University of California System; University of California Irvine; Peking University
• 刊物名称: INFORMATION SYSTEMS RESEARCH
• ISSN/ISSBN: 1047-7047
• DOI: 10.1287/isre.1070.0120
• 发表日期: 2007
• 页码: 370-394
• 关键词: market value; shareholder-wealth; VALUE RELEVANCE; stock returns; IMPACT; event; MODEL; INVESTMENT; earnings; firm

摘要

This paper takes an event study approach to jointly examine the wealth and risk effects associated with electronic commerce announcements, contributing to the emerging research on the riskiness of IT investments and the trade-off between risk and return in the information systems literature. We estimate a generalized event study model that allows for both systematic and unsystematic risk changes on data collected for electronic commerce announcements in the 1996-2002 time frame. A striking result emerging from our analysis is that wealth effects are not significant after controlling for contemporaneous risk changes. Both total and unsystematic risk show a significant postevent increase in 1998 and 2000, whereas systematic risk adjusts downward in 1996 and 2002. Put together, our results contribute to our nascent understanding of how IT initiatives affect the risk-return profile of the firm.