We examine a new class of games, which we call social games, where players not only choose strategies but also choose with whom they play. A group of players who are dissatis ed with the play of their current partners can join together and play a new equilibrium. This imposes new re nements on equilibrium play, where play depends on the relative populations of players in di erent roles, among o...

Over the last several decades academic journal articles have become longer and changed in other ways. The review process has also changed – it now often involves extensive revisions of initial submissions. This paper develops a model of evolving standards for academic publishing. Papers are assumed to vary along two quality dimensions: q and r. The former is interpreted as the importance of a p...

We estimate the causal effects of immigrant networks on individuals’ remittance sending behavior for migrants from many different countries residing in Spain. Our methodology addresses typical issues that arise when estimating network effects: reverse causality, common unobserved factors, and self-selection. In particular, we instrument the size of networks by predicting the number of migrants ...

PURPOSE Since November 2006, imipenem-resistant Acinetobacter baumannii isolates have increased in Kyung Hee University Hospital in Seoul, Korea. The purpose of this study was to determine the genetic basis and molecular epidemiology of outbreak isolates. MATERIALS AND METHODS Forty-nine non-repetitive isolates of the 734 IRAB strains were investigated in order to determine their characterist...

The S100s are a large group of Ca(2+) sensors found exclusively in vertebrates. Transcriptomic and genomic data from the major radiations of mammals were used to derive the evolution of the mammalian S100s genes. In human and mouse, S100s and S100 fused-type proteins are in a separate clade from other Ca(2+) sensor proteins, indicating that an ancient bifurcation between these two gene lineages...

We study learning and influence in a setting where agents communicate according to an arbitrary social network and näıvely update their beliefs by repeatedly taking weighted averages of their neighbors’ opinions. A focus is on conditions under which beliefs of all agents in large societies converge to the truth, despite their näıve updating. We show that this happens if and only if the influenc...

At low temperature (T<lO°C), CaAl201fio is formed by hydration of high-alumina cements (HACs). HACs are used for rekactory applications; heat treatments then lead to thermal decomposition of CaAl201fio. which first dehydrates to CaAl~04& (X < 10) and finally to the anhydrous phase CaA1204. In CaAlzOl&, aluminium atoms are 6-coordinated, whereas they are 4-coordinated in CaAl20.4. Materials heat...

The Diffusion of Information Technology and the Increased Propensity of Teams to Transcend Institutional and National Borders This study examines the relationship between the diffusion of IT and changes in collaboration patterns across institutional and national borders. To undertake the research, the authors match an explicit measure of institutional IT adoption (domain names, e.g. www.umsl.ed...

Ethnic Networks and Employment Outcomes We analyse the effect of strong and weak ties on the individual probability of finding a job. Using the dynamic model of Calvó-Armengol and Jackson (2004), two results are put forward: (i) the individual probability of finding a job is increasing in the number of strong and weak ties; (ii) the longer the length of ties, the lower is this effect. We approx...

We examine the spread of a disease or behavior through a social network. In particular, we analyze how infection rates depend on the distribution of degrees (numbers of links) among the nodes in the network. We introduce new techniques using …rstand second order stochastic dominance relationships of the degree distribution in order to compare infection rates across di¤erent social networks. JEL...