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Modeling the stock market prior to large crashes
We propose that the minimal requirements for a model of stock market price fluctuations should comprise time asymmetry, robustness with respect to...
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Economic returns of research: the Pareto law and its implications
At what level should government or companies support research? This complex multi-faceted question encompasses such qualitative bonus as satisfying...
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The space-time pattern of price waves
We investigate the way price fluctuations are transmitted between spatially separated markets. More specifically we show that the correlation...
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Competing species dynamics: Qualitative advantage versus geography
A simple cellular automata model for a two-group war over the same “territory” is presented. It is shown that a qualitative advantage is not enough...
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How the financial crash of October 1997 could have been predicted
From the analysis of (closing value) stock market index like the Dow Jones Industrial average and the S&P500 it is possible to observe the precursor...
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How popular is your paper? An empirical study of the citation distribution
Numerical data for the distribution of citations are examined for: (i) papers published in 1981 in journals which are catalogued by the Institute for...
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Stretched exponential distributions in nature and economy: “fat tails” with characteristic scales
To account quantitatively for many reported “natural” fat tail distributions in Nature and Economy, we propose the stretched exponential family as a...
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Stock market crashes are outliers
We call attention against what seems to be a widely held misconception according to which large crashes are the largest events of distributions of...