Jeroen Bruggeman

Learn More
Detecting communities in complex networks accurately is a prime challenge, preceding further analyses of network characteristics and dynamics. Until now, community detection took into account only positively valued links, while many actual networks also feature negative links. We extend an existing Potts model to incorporate negative links as well,(More)
Qualitative reasoning is traditionally associated with the domain of physics, although the domain of application is, in fact, much broader. This paper investigates the application of qualitative reasoning beyond the domain of physics. It presents a case study of application in the social sciences: the density dependence theory of organizational ecology. It(More)
Resource partitioning theory claims that “Increasing concentration enhances the life chances of specialist organizations.” We systematically think through this theory, specify implicit background assumptions, sharpen concepts, and rigorously check the theory’s logic. As a result, we increase the theory’s explanatory power, and claim— contrary to received(More)
FROM THE MARGIN TO THE MAINSTREAM: AN AGENDA FOR COMPUTER SIMULATIONS IN THE SOCIAL SCIENCES Erhard Bruderer The University of Minnesota Carlson School of Management and Martin Maiers The University of Minnesota Department of Computer Science Computer simulation has had a long and established tradition in the social sciences. Unfortunately, research in this(More)
This paper elaborates a relational approach to examine discursive contention. We develop a network method to identify groups forming through contentious interactions as well as relational measures of polarization, leadership, solidarity and various aspects of discursive power. The paper analyzes how an etwork analysis
“The Strength of Weak Ties” argument (Granovetter 1973) says that the most valuable information is best collected through bridging ties with other social circles than one’s own, and that those ties tend to be weak. Aral and Van Alstyne (2011) added that to access complex information, actors need strong ties (“high bandwidth”) instead. These insights I(More)
We reviewed 48 records of combined blood pool and transmission scans, performed in the last three years for mediastinal masses and cardiomegaly. The purpose was to investigate the diagnostic value of this radioisotopic examination, and in particular to compare it with the roentgenographic examination. The accuracy of both methods in visualizing mediastinal(More)