random walk


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random walk

[′ran·dəm ′wȯk]
(mathematics)
A succession of movements along line segments where the direction and possibly the length of each move is randomly determined.
References in periodicals archive ?
By assuming that the covariance matrix presents time-dependent positions and the station monuments are subject to a random walk process, then the formal uncertainty of the estimated velocities is approximated by (Zhang et al.
5 cm; the correlated random walk was most successful for targets between 22.
A random walk algorithm is used to estimate the candidate confidence.
In EDFC strategy the length of each random walk is set to 200, while in LTCDS strategy the parameter C is set to 5, i.
In this study, the goal is to compare forecasts obtained from the random walk models with and without drift against a wide array of econometric models.
They observed random walk behavior in daily stock prices, however they found that performance of weekly and monthly returns were significant but still investors were unable to forecast the future trend.
For instance, Chun (2000) based on variance ratio tests found that the Hungarian capital market was weakly efficient; Gilmore and McManus (2003) investigated informational efficiency in its weak form from the Czech Republic, Poland and Hungary (within 1995-2000) and rejected the random walk hypothesis based on the results of a model comparison approach.
If there is R such that the random walk starting at [x.
Interestingly, when they used this test for weekly returns in the US stock market from 1962 to 1985, they strongly rejected the random walk hypothesis.
Restricted random walk [6] represents an improvement upon random walk resource discovery mechanism.
On the other hand, they simultaneously seem to be missing his key point right in the title of the book--that the stock market follows a random walk.
The initial turf configuration is generated by means of the restricted random walk algorithm and subsequent relaxation.