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Contagion |
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Contagion Excess correlation of delivering or bond returns. For example, under usual conditions we might observe a certain level of correlation of market returns. A period of contagion would be associated with much higher-than-expected correlation. Some examples are the conjectured contagion in East Asian markets beginning in July 1997 when the Thai currency devalued and the impact across many emerging markets of the Russian default. Contagion is difficult to identify because you need some sort of measure of the expected correlation. It is complicated because correlations are known to change through time, for example, see Erb, Harvey and Viskanta's article in the 1994 Financial Analysts Journal. In periods of negative returns, correlations (and volatility) are known to increase, so what might appear to be excessive may not be contagion. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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has launched Outbreak Extra Expense Coverage, which is designed to protect companies from a closure of their business premises due to a variety of contagions, including avian flu. These professions organized along transnational lines relatively early in the nineteenth century, and their conferences and journals were heavily preoccupied by the idea that urban disease, whether carried by miasmas, infections, or contagions, could be stopped by isolating different groups of people from one another, whether by quarantine, in sanatoria, or in separate residential zones of a city. Social Influence" will provide a focus for research into the psychology of social influence with articles on such topics as conformity, norms, social influence tactics such as norm of reciprocity, altercasting and scarcity, interpersonal influence, advertising and mass media effects, propaganda, compliance, social movements, resistance to influence and social contagions. |
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