Johan Lambert Trudo Maria Bollen (born 1971) is a scientist investigating complex systems and networks, the relation between social media and a variety of socio-economic phenomena such as the financial markets, public health, and social well-being, as well as Science of Science with a focus on impact metrics derived from usage data. He presently works as associate professor at the

Indiana University School of Informatics The Luddy School of Informatics, Computing, and Engineering is an academic unit of Indiana University located on the Indiana University Bloomington (IUB) campus and, under the name Indiana University School of Informatics and Computing (SOIC), o ...

Indiana University Indiana University (IU) is a system of public universities in the U.S. state of Indiana. Campuses Indiana University has two core campuses, five regional campuses, and two regional centers under the administration of IUPUI. *Indiana Universit ...

Bloomington and a fellow at the SparcS Institute of

Wageningen University and Research Centre Wageningen University & Research (also known as Wageningen UR; abbreviation: WUR) is a public university in Wageningen, Netherlands, specializing in life sciences with a focus on agriculture, technical and engineering subjects. It is a globally ...

in the

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. He is best known for his work on scholarly impact metrics, measuring public well-being from large-scale social media data, and correlating Twitter mood to stock market prices. He has taught courses on data mining, information retrieval, and digital libraries. His research has been funded by The Andrew W. Mellon Foundation, National Science Foundation, Library of Congress, National Aeronautics and Space Administration and the Los Alamos National Laboratory. In his free time, he DJs at the Root Cellar Lounge in

Bloomington, Indiana Bloomington is a city in and the county seat of Monroe County, Indiana, Monroe County in the central region of the U.S. state of Indiana. It is the List of municipalities in Indiana, seventh-largest city in Indiana and the fourth-largest outside ...

. He specializes in

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and

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Biography

Bollen received his MS in experimental psychology from the

Free University of Brussels University of Brussels may refer to several institutions in Brussels, Belgium: Current institutions * Université libre de Bruxelles (ULB), a French-speaking university established as a separate entity in 1970 *Vrije Universiteit Brussel (VUB), a D ...

in 1993 after a master thesis "Learning to Select Activities: a Conditionable System for an Autonomous Robot that Learns to Use Drive Reduction as Reinforcement." He defended his Ph.D. in psychology from the Free University of Brussels in October 2001 on the subject of cognitive models of human hypertext navigation. From 2002 to 2005 he was an assistant professor at the Department of Computer Science of

Old Dominion University Old Dominion University (Old Dominion or ODU) is a public research university in Norfolk, Virginia. It was established in 1930 as the Norfolk Division of the College of William & Mary and is now one of the largest universities in Virginia w ...

. He was a staff scientist at the Los Alamos National Laboratory from 2005 to 2009. He is currently a professor at the

School of Informatics and Computing.

Work

Bollen's work has been extensively covered in the press and popular media and has received over 6,900 citations (2016 h-index 33). Bollen was awarded two patents: one for "Usage based indicators to assess the impact of scholarly works: architecture and method" (US 8135662 B2) and "Predicting economic trends via network communication mood tracking" (US 8380607 B2). His work has found widespread application, e.g. in systems for digital library recommendations systems (Ex Libris bX Recommender Service) and in systems that use social media information to generate financial trading signals. As a result of his work on predicting the stock market based on Twitter mood, Derwent Capital Markets started the Absolute Return fund, the worlds's first Twitter hedge fund. However, it later shut down after thirteen months.

Selected academic works

Bollen has published over 70 papers. A selection of the highly cited ones: * 2011,

Twitter Twitter is an online social media and social networking service owned and operated by American company Twitter, Inc., on which users post and interact with 280-character-long messages known as "tweets". Registered users can post, like, and ...

mood predicts the stock market. * 2005, Co-authorship networks in the digital library research community. * 2009, Modeling public mood and emotion: Twitter sentiment and socio-economic phenomena * 2006: Bollen, Johan; Rodriquez, Marko A.; Van de Sompel, Herbert (2006). "Journal status". Scientometrics. 69 (3): 669–687. * 2009, A Principal Component Analysis of 39 Scientific Impact Measures * 2005, Toward alternative metrics of journal impact: A comparison of download and citation data * 2014, Proposed

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, a new method for distribution of research funding.

References

{{DEFAULTSORT:Bollen, Johan 1971 births Living people Belgian academics Computer scientists Internet culture Indiana University faculty