Gupta, H. M.Campanha, JR2014-05-202014-05-201999-06-01Physica A. Amsterdam: Elsevier B.V., v. 268, n. 1-2, p. 231-239, 1999.0378-4371http://hdl.handle.net/11449/36446Power-law distributions have been observed in various economical and physical systems. Levy flights have infinite variance which discourage a physical approach. We introduce a class of stochastic processes, the gradually truncated Levy flight in which large steps of a Levy flight are gradually eliminated. It has finite variance and the system can be analyzed in a closed form. We applied the present method to explain the distribution of a particular economical index. The present method can be applied to describe time series in a variety of fields, i.e. turbulent flow, anomalous diffusion, polymers, etc. (C) 1999 Elsevier B.V. B.V. All rights reserved.231-239engLevy flightpower-law distributionsstochastic processesstock marketArtigo10.1016/S0378-4371(99)00028-XWOS:000080802400019Acesso restrito