Thesis (Ph. D.)--Massachusetts Institute of Technology, Sloan School of Management, 2007. / Includes bibliographical references. / I examine how information technology (IT) skills and use, communication network structures, and the distribution and flow of information in organizations impact individual information worker productivity. The work is divided into three essays based on the task level practices of information workers at a midsize executive recruiting firm: Essay 1: "Information, Technology and Information Worker Productivity: Task Level Evidence." I develop and econometrically test a multistage model of production and interaction activities at the firm, and analyze correlations among network structure, characteristics of information flow and real economic output. I find that (a) IT use is positively correlated with non-linear drivers of productivity; (b) the structure and size of workers' communication networks are highly correlated with performance; (c) an inverted-U shaped relationship exists between multitasking and productivity such that, beyond an optimum, more multitasking is associated with declining project completion rates and revenue generation; and (d) asynchronous information seeking such as email and database use promotes multitasking while synchronous information seeking over the phone shows a negative correlation. These data demonstrate a strong correspondence among technology use, social networks, and productivity for project-based information workers. / (cont.) Essay 2: "Network Structure and Information Advantage: Structural Determinants of Access to Novel Information and their Performance Implications." I examine relationships between social network structure, information structure, and individual performance. I build and validate a Vector Space Model of information diversity, develop hypotheses linking two key aspects of network structure - size and diversity - to the distribution of novel information among actors, and test the theory using data on email communication patterns, message content and performance. Results indicate that access to diverse, novel information is related to network structure in non-linear ways, and that network diversity contributes to performance even when controlling for the positive performance effects of access to novel information, suggesting additional benefits to network diversity beyond those conferred through information advantage. / (cont.) Essay 3: "Organizational Information Dynamics: Drivers of Information Diffusion in Organizations." I examine drivers of the diffusion of different types of information through organizations by observing several thousand diffusion processes of two types of information -'event news' and 'discussion topics' - from their original first use to their varied recipients over time. I then test the effects of network structure and functional and demographic characteristics of dyadic relationships on the likelihood of receiving each type of information and receiving it sooner. Discussion topics exhibit more shallow diffusion characterized by 'back-and-forth' conversation and are more likely to diffuse vertically up and down the organizational hierarchy, across relationships with a prior working history, and across stronger ties; while news, characterized by a spike in communication and rapid, pervasive diffusion through the organization, is more likely to diffuse laterally as well as vertically, and without regard to the strength or function of relationships. The findings highlight the importance of simultaneous considerations of structure and content in information diffusion studies. / by Sinan Aral. / Ph.D.
| Identifer | oai:union.ndltd.org:MIT/oai:dspace.mit.edu:1721.1/39003 |
| Date | January 2007 |
| Creators | Aral, Sinan |
| Contributors | Erik Brynjolfsson., Sloan School of Management., Sloan School of Management. |
| Publisher | Massachusetts Institute of Technology |
| Source Sets | M.I.T. Theses and Dissertation |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | 127 leaves, application/pdf |
| Rights | M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission., http://dspace.mit.edu/handle/1721.1/7582 |
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