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Testing for Trend [PDF]

open access: possibleSSRN Electronic Journal, 2007
Summary: The paper examines various tests for assessing whether a time series model requires a slope component. We first consider the simple \(t\)-test on the mean of first differences and show that it achieves high power against the alternative hypothesis of a stochastic nonstationary slope and also against a purely deterministic slope.
Fabio Busetti, Andrew Harvey
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TRENDS

Pediatrics, 1948
AT THE present writing, the 81st Congress has reconvened but it is doubtful whether much, if any, attention will be given to the many health bills which have been discussed at such length in Committee and on the Floor. By the time this review and preview is published, the 81st Congress will have finally adjourned and all unfinished business in the ...
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Trends in identification

Automatica, 1979
The paper refers to methods used for identification of linear and nonlinear systems. Deterministic and stochastic approaches are distinguished and specific features concerning parameters, structure and state estimation are briefly discussed from the point of view of possible advantages and difficulties for identification. Attention is paid to different
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Future Trends

Clinics in Laboratory Medicine, 2007
Several current forces have set anticipated future changes in health care in motion, or, at least, have set the stage for change. End-consumer demand increasingly drives the market; as a result, entire businesses are transforming or emerging anew to meet these demands.
Richard C, Friedberg, Ronald L, Weiss
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Trends and Controversies

IEEE Intelligent Systems, 2018
Performing covert biometric recognition in surveillance environments has been regarded as a grand challenge, considering the adversity of the conditions where recognition should be carried out (e.g., poor resolution, bad lighting, off-pose and partially occluded data). This special issue compiles a group of approaches to this problem.
Hugo Proença 0001   +23 more
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Trends in steganography

Communications of the ACM, 2014
Methods for embedding secret data are more sophisticated than their ancient predecessors, but the basic principles remain unchanged.
Elzbieta Zielinska   +2 more
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Tendencies and Trends

2015
When we look for general tendencies in the development of the role of Nordic educational superintendents, we find that social technologies have become fundamental features of contemporary governance, education and comparisons. Social technologies are procedures, recipes, manuals, methods, indicators etc. that are produced and implemented for the use of
Moos, Lejf; id_orcid 0000-0002-9425-062X   +2 more
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On trend and autocorrelation

Communications in Statistics, 1975
Many time series in economics and other areas can be effectively represented as the sum of a polynomial trend and an autoregressive intagratad moving average process, in some cases after allowing for a systematic modal. Such series are nonstationary if either the degree $ill:a$eill: of the trend or the number d of autoregressive roots lying on the unit
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