Recent events have drawn attention to the issue of contagion. Dependencies among countries, including through trade links, will cause shocks to an individual country (or group of countries) to affect other countries, often on a regional basis. Such linkages are not contagion, but an increase in cross-market linkages after a shock to one country could be contagion. Weak countries’ economic funda...

We leveraged exogenous variation in weather patterns across geographies to identify social contagion in exercise behaviours across a global social network. We estimated these contagion effects by combining daily global weather data, which creates exogenous variation in running among friends, with data on the network ties and daily exercise patterns of ∼1.1M individuals who ran over 350M km in a...

Human mobility and activity patterns mediate contagion on many levels, including: spatial spread of infectious diseases, diffusion of rumors, and emergence of consensus. These patterns however are often dominated by specific locations and recurrent flows and poorly modeled by the random diffusive dynamics generally used to study them. Here we develop a theoretical framework to analyze contagion...

The purpose of this paper is to investigate vulnerability to financial contagion in a set of expanding emerging markets of the Middle East and North Africa, during seven episodes of international financial crisis. Using Fry & Baur (2005) fixed-effect panel approach, we significantly reject the hypothesis of a joint regional contagion. However, using a battery of bivariate contagion tests based ...

Recent advances in crowd simulation models attempt to recreate realistic human behaviour by introducing psychological phenomena in virtual agents. In this direction, psychology studies on personality traits, emotions and emotional contagion attempt to cope with emerging behaviours such as panic spreading and fight picking. This work depicts a way to introduce a model of emotional contagion in t...

We examine the contagion processes whereby practices originating in one organizational population spread into and diffuse within a second. We theorize that “endemic” innovations native to one population spread to other populations through two distinct forms of contagion. We test this argument by observing information technology firms’ adoption of corporate venture capital programs. Results sugg...

This paper takes an asset pricing perspective to investigate the equity market comovement and contagion at the sector level during the period 1990-2004 across the regions of Europe, Asia, and Latin America. It examines whether unexpected shocks from a particular market, or group of markets, are propagated to the sectors in other countries. The results confirm the sector heterogeneity of contagi...

In humans and apes, yawn contagion echoes emotional contagion, the basal layer of empathy. Hence, yawn contagion is a unique tool to compare empathy across species. If humans are the most empathic animal species, they should show the highest empathic response also at the level of emotional contagion. We gathered data on yawn contagion in humans (Homo sapiens) and bonobos (Pan paniscus) by apply...

The ability to share others' emotions, or empathy, is crucial for complex social interactions. Clinical, psychological, and neurobiological clues suggest a link between yawn contagion and empathy in humans (Homo sapiens). However, no behavioral evidence has been provided so far. We tested the effect of different variables (e.g., country of origin, sex, yawn characteristics) on yawn contagion by...

This is a first study on attachment to national and sacred land and land as a protected value. A measure of attachment to the land of Israel is developed and administered to two groups, Jewish college students in Israel and the United States. Levels of land attachment are high and not significantly different in the two groups, with a great deal of variation. Land may become more important throu...