The hurst effect and its implications for extrapolating process rates

1987 ◽  
Vol 12 (1) ◽  
pp. 57-67 ◽  
Author(s):  
M. J. Kirkby
Keyword(s):  
1983 ◽  
Vol 20 (3) ◽  
pp. 649-662 ◽  
Author(s):  
R. N. Bhattacharya ◽  
Vijay K. Gupta ◽  
Ed Waymire

Necessary and sufficient conditions for the so-called Hurst effect are given in the case of a weakly dependent stationary sequence of random variables perturbed by a trend. As a consequence of this general result it is shown that the Hurst effect is present in the case of weakly dependent random variables with a small monotonic trend of the form f(n) = c(m + n)ß, where m is an arbitrary non-negative parameter and c is not 0. For – ½ < ß < 0 the Hurst exponent is shown to be precisely given by 1 + ß. For ß ≦ – ½ and for ß = 0 the Hurst exponent is 0.5, while for ß > 0 it is 1. This simple mathematical model, motivated by empirical evidence in various geophysical records, demonstrates the presence of the Hurst effect in a direction not explored before.


1975 ◽  
Vol 26 (1-2) ◽  
pp. 39-53 ◽  
Author(s):  
A.A. Anis ◽  
E.H. Lloyd
Keyword(s):  

2002 ◽  
Vol 35 (20) ◽  
pp. 4395-4412 ◽  
Author(s):  
Thierry Huillet

1993 ◽  
Vol 29 (12) ◽  
pp. 3995-4002 ◽  
Author(s):  
Oscar J. Mesa ◽  
German Poveda

1980 ◽  
Vol 17 (02) ◽  
pp. 432-439
Author(s):  
A. A. Anis ◽  
M. Gharib

A general formula is obtained for the variance of the maximum of partial sums of n-exchangeable random variables, derived from a result of Spitzer's. The formula is applied in particular to obtain the variance of the maximum of adjusted rescaled partial sums of normal summands. This is of direct relevance to the Hurst effect.


1976 ◽  
Vol 31 (1-2) ◽  
pp. 193-194
Author(s):  
E.H. Lloyd
Keyword(s):  

1980 ◽  
Vol 17 (2) ◽  
pp. 432-439
Author(s):  
A. A. Anis ◽  
M. Gharib

A general formula is obtained for the variance of the maximum of partial sums of n-exchangeable random variables, derived from a result of Spitzer's. The formula is applied in particular to obtain the variance of the maximum of adjusted rescaled partial sums of normal summands. This is of direct relevance to the Hurst effect.


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