Download PDF by Rosario N. Mantegna: An Introduction to Econophysics: Correlations and Complexity

By Rosario N. Mantegna

ISBN-10: 0521620082

ISBN-13: 9780521620086

Statistical physics ideas equivalent to stochastic dynamics, brief- and long-range correlations, self-similarity and scaling, allow an knowing of the worldwide habit of financial platforms with no first having to determine an in depth microscopic description of the method. This pioneering textual content explores using those techniques within the description of economic platforms, the dynamic new area of expertise of econophysics. The authors illustrate the scaling options utilized in likelihood thought, serious phenomena, and fully-developed turbulent fluids and practice them to monetary time sequence. in addition they current a brand new stochastic version that monitors numerous of the statistical homes saw in empirical info. Physicists will locate the applying of statistical physics techniques to financial structures interesting. Economists and different monetary execs will enjoy the book's empirical research tools and well-formulated theoretical instruments that may let them describe structures composed of a tremendous variety of interacting subsystems.

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Extra resources for An Introduction to Econophysics: Correlations and Complexity in Finance

Example text

The knowledge of the first- and second-order conditional probability densities fully characterizes a Markov process since any higher-order joint probability density can be determined from them. For a non-Markovian process, this knowledge is not sufficient to fully characterize the stochastic process.

Random variables xi converges, in probability, to a stable distribution under certain conditions on the pdf of the random variable xi . d. random variables. 31) and β≡ C+ − C − . 32) Then P˜ (S˜n ) approaches a stable non-Gaussian distribution PL (x) of index α and asymmetry parameter β, and P (Sn ) belongs to the attraction basin of PL (x). Since α is a continuous parameter over the range 0 < α ≤ 2, an infinite number of attractors is present in the functional space of pdfs. They comprise the set of all the stable distributions.

3) or (ii) a uniform P (xi ) (Fig. 4). As expected, the P (Sn ) distribution broadens when n increases. 13) n 18 Random walk Fig. 3. Top: Simulation of P (Sn ) for n ranging from n = 1 to n = 250 for the case when P (x) is a double triangular function (inset). Bottom: Same distribution using scaled units. and P˜ (˜ x) ≡ P (˜ x)n1/2 . 14) By analyzing the scaled pdfs P˜ (˜ x) observed at large values of n in Figs. 4, we note that the distributions rapidly converge to the functional form of the Gaussian of unit variance (shown as a smooth curve for large n).

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An Introduction to Econophysics: Correlations and Complexity in Finance by Rosario N. Mantegna


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