منابع مشابه
Tweeting and tornadoes
Social Media and micro-blogging is being used during crisis events to provide live up-to-date information as events evolve (before, during and after). Messages are posted by citizens or public officials. To understand the effectiveness of these messages, we examined the content of geo-located Twitter messages (“tweets”) sent during the Moore, Oklahoma tornado of May 20, 2013 (+/-1day) to explor...
متن کاملSunspots and Temperatures
Power spectrum analyses of temperature series at New York City (1822-1956), the Netherlands (1735-1944), and central England (1698-1955) show that the only significant energy in these spectrums appears at the annual period of 12 months. No significant energy was found corresponding to any known sunspot periodicity. Correlation coefficients between January and July temperatures for the years of ...
متن کاملSunspots, correlation and competition
Correlated equilibria in strategic market games played, simultaneously, by “overlapping generations” of players correspond to sunspot equilibria in the associated, competitive economy. The lower the degree of competition, the larger the range of parameters that allow for effective correlation or endogenous stochastic fluctuations.
متن کاملImperfect Competition and Sunspots
This paper shows that imperfect competition can be a rich source of sunspots equilibria and coordination failures. This is demonstrated in a dynamic general equilibrium model that has no major distortions except imperfect competition. In the absence of fundamental shocks, the model has a unique certainty (fundamental) equilibrium. But there is also a continuum of stochastic (sunspots) equilibri...
متن کاملSunspots and Credit Frictions
We examine a general equilibrium model with collateral constraints and increasing returns to scale in production. The utility function is nonseparable, with no income e¤ect on the consumers choice of leisure. Unlike this model without a collateral constraint, we nd that indeterminacy of equilibria is possible. Hence, business cycles can be driven by self-ful lling expectations. This is the ca...
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ژورنال
عنوان ژورنال: Science
سال: 1890
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.ns-15.378.276-a