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"Closing borders is naive, the virus will come regardless" - this was the policy assumption that was repeatedly stated until mid-March by the WHO, the EU, as well as responsible authorities in Germany and other countries. Meanwhile, other states had started closing their borders to travellers...
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We study learning and influence in a setting where agents communicate according to an arbitrary social network and naïvely 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...
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Using quarterly data of 58 countries, this paper provides empirical evidence that mobile phone diffusion from 2007 to …). In addition, we test if the impact on mobile phone diffusion differs whether technologies are local or global standards … (Global System for Mobile Communications) technology prevent the diffusion of third generation (3G) mobile phones. We show …
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The novelty of our model is to combine models of collective action on networks with models of social learning. Agents are connected according to an undirected graph, the social network, and have the choice between two actions: either to adopt a new behavior or technology or stay with the default...
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