Results 81 to 90 of about 502,822 (117)
Cointegration and Unit Roots. [PDF]
This paper provides an updated survey of a burgeoning literature on testing, estimation and model specification in the presence of integrated variables.
Jenkinson, Tim +2 more
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Using the HEGY Procedure When Not All Roots Are Present [PDF]
Empirical studies have shown little evidence to support the presence of all unit roots present in the filter in quarterly seasonal time series. This paper analyses the performance of the Hylleberg, Engle, Granger and Yoo (1990) (HEGY) procedure when the ...
Tomas del Barrio Castro
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Complex Unit Roots and Business Cycles: Are They Real? [PDF]
In this paper the asymptotic properties of ARMA processes with complex- conjugate unit roots in the AR lag polynomial are studied. These processes behave quite differently from processes with a single root equal to 1.
Herman J. Bierens
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Ain't No Ash Will Burn (Video)
, 2015 Berea College Folk and Roots Ensemble perform at Rhonda Vincent And The Rage Convocation ...
Berea College Folk and Roots Ensemble (Julie Nelms, Adam Hudson, Andy Brown, and Tyler Rosso) (Video)
core
TESTS ON SEASONAL UNIT ROOTS IN TAIWAN'S VEGETABLE PRICES [PDF]
Taiwan's retail and farm prices were examined for unit roots at various seasonal frequencies. The results show that no unit roots exist at any seasonal frequency.
Lei, Li-Fen
core
Cyanobionts from the coralloid roots of Cycadales: is there any molecular evidence of cyanotoxins?
Limnetica, 2015 Pereira, Ana L. +2 more
openaire +1 more source
Logan H. Roots papers, 1843-1966
This collection chiefly consists of original and photocopied letters written to Logan Roots during the Civil War and Reconstruction. Roots's papers also include commissions, financial items, original photographs, and genealogical material concerning the ...
core +1 more source
SEM observations on cyanobacteria-infected cycad coralloid roots [PDF]
South African Journal of Botany, 1988 In Nostoc-infected coralloid roots of the cycads Encephalartos transvenosus Stapf & Burtt Davy and E. paucidentatus Stapf & Burtt Davy the intercellular cyanobacteria are present in a narrow circular band between the outer and the inner cortex only. When
N Grobbelaar
exaly +3 more sources
The occurrence of coralloid roots on the South African species of the Cycadales and their ability to fix nitrogen symbiotically [PDF]
South African Journal of Botany, 1986 Thirty-three species of Encephalartos, which include all the known species indigenous to the Republic of South Africa, together with Stangeria eriopus, were found to form coralloid roots.
N Grobbelaar
exaly +3 more sources
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Structure and physiology of Cycad coralloid roots
Giornale Botanico Italiano (Florence, Italy: 1962), 1993Abstract The gonidial zone organization of coralloid roots of Cycas revoluta is reported together with the taxonomy of cyanobiont, the physiology of the association and the significance of nitrogen fixation. Recent data on gonidial zone composition obtained by microelectrodes and immunogold labeling are referred in order to determine the mechanisms of ...
Antonella Canini, M Grilli Caiola
exaly +3 more sources