Proceedings of 7th Annual American Business Research Conference 23 - 24 July 2015, Sheraton LaGuardia East Hotel, New York, USA, ISBN: 978-1-922069-79-5 Effect of Top Management Support on Information Systems Implementation Success: Additional Issues Mark Hwang Brief statement of Research question or objective or statement of problem: The objective is to determine the true effect of top management support on systems success by controlling the effect of two confounding variables. Period of study, methodology or model used: A meta-analysis will be conducted. A brief statement of findings: the true effect of top management support on systems success. Implementation of information systems (IS) is usually resource intensive, but the results are often less than satisfactory. The botched rollout of the Obamacare website exemplifies how an IS project can cause tremendous havoc that leads to waste of valuable resources and damaged reputation of an organization (Judicial Watch, 2014). Numerous studies have been devoted to finding factors that contribute to the success of IS implementation (Sabherwal, Jeyaraj, and Chowa, 2006). Among the factors that have been most extensively investigated, top management support has usually been found to play a critical role to the project outcomes (Ifinedo, 2008). Some researchers even claim that top management support is the most critical factor to systems implementation success (Young and Jordan, 2008). However, not all empirical evidence supports the critical role of top management support. A meta-analysis found that the effect of top management support is moderated by task interdependence (Sharma and Yetton 2003). A more recent meta-analysis, however, found that top management support equally effective in both high and low task interdependence groups (Hwang and Schmidt, 2011). Is the effect of top management support universal as reported by Young and Jordan (2008) and Hwang and Schmidt (2011) or situational as asserted by Sharma and Yetton (2003)? The current research seeks to shed light on the debate by examining additional methodological factors that may have contributed to inconsistent findings cited in the literature. Specifically, we seek to study the potential confounding effect of two variables: common method variance and measurement of the systems success variable. The objective is to determine the true effect of top management support on systems success after the effect of two confounding variables is accounted for. Management Track _____________________________________________________________________ Dr. Mark Hwang, BIS Department, Central Michigan University, Mt. Pleasant, MI 48859, mark.hwang@cmich.edu, Phone: 989-7745900, Fax: 989-7743356