We investigate an extension of the voter model in which voters are equipped with an individual inertia to change their opinion. This inertia depends on the persistence time of a voter's current opinion (aging). We focus on the case of only two different inertia values: zero if a voter just...

This work introduces a new model to investigate the efficiency and evolution of networks of firms exchanging knowledge in R&D partnerships. We first examine the efficiency of a given network structure in terms of the maximization of total profits in the industry. We show that the efficient...

This paper makes two important contributions to understand the mobility patterns of scientists. First, by combining two large-scale data sets covering the publications of 3.5 mio scientists over 60 years, we are able to reveal the geographical "career paths" of scientists. Each path contains, on...

We propose a novel way to measure the reputation of firms by using information about their ownership structure. Supported by the signaling theory, we argue that ownership relations channel reputation spillovers between shareholders and their invested companies. We model such reputation...

Based on the empirical analysis of the dependency network in 18 Java projects, we develop a novel model of network growth which considersboth: an attachment mechanism and the addition of new nodes with a heterogeneous distribution of their initial degree, k₀. Empirically we find that the...