Results 1 to 10 of about 157,083 (241)
The seasonality of conception [PDF]
Demography, 2007 AbstractIndividual data on menstrual cycles of noncontracepting women living in Western countries were used in order to verify whether the biological seasonality of conception persists after sexual behavior is controlled for. Episodes of intercourse were recorded daily, and the time of ovulation was detected by a marker. We find that the seasonality of
E. Rizzi, DALLA ZUANNA, GIANPIERO
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Seasonality of coitus and seasonality of birth [PDF]
Demography, 1967 Resumen En todas las poblaciones estudiadas se ha observado quehay una variación estacional en la tasade natalidad. Se han adelantado muchas hipótesis para explicaresiavariación, incluyendo una variación estacional en lafrecuenciadel coiio, Se sabe que ésta relación es eierta para otros primates, peroen el hombre, no se ha documentado ...
J R, Udry, N M, Morris
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On the Role of Seasonal Intercepts in Seasonal Cointegration [PDF]
Oxford Bulletin of Economics and Statistics, 1999 In the paper we consider the role of seasonal intercepts in seasonal cointegration analysis. For the nonseasonal unit root, such intercepts can generate a stochastic trend with a drift common to all observations. For the seasonal unit roots, however, we show that unrestricted seasonal intercepts generate trends that are different across the seasons ...
Franses, Philip Hans, Kunst, Robert M.
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Seasonal integration and the evolving seasonals model
International Journal of Forecasting, 1997 Abstract The paper uses a model of seasonality popular in the 1960s, the evolving seasonals model, to explore issues relating to testing for unit roots in seasonal time series. The model is used to show how data can be transformed in such a way that tests for seasonal integration simply become those for regular unit roots.
Hylleberg, Svend, Pagan, Adrian R.
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SEASONALITY OF BIRTHS IS ASSOCIATED WITH SEASONALITY OF MARRIAGES IN MALTA [PDF]
Journal of Biosocial Science, 2002 This study was carried out to quantify secular trends in seasonal variation in births in Malta, a small Mediterranean country where the vast proportion of births occur in wedlock due to a predominantly Roman Catholic population. It also related such variations to seasonal variation in marriages.
Grech, Victor E. +3 more
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Deterministic seasonality versus seasonal fractional integration [PDF]
Journal of Statistical Planning and Inference, 2005 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Journal of Global Infectious Diseases, 2011 Objectives: This study was designed to review previous studies and analyse the current knowledge and controversies related to seasonal variability of tuberculosis (TB) to examine whether TB has an annual seasonal pattern. Study Design and Methods:
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, 2023 How are communities worldwide experiencing changes to their seasons? Through 35 real-world accounts of seasonal change by researchers and practitioners, this anthology gives pause to critically rethink what seasons mean. The chapters invite us to see seasons not as stable facts of nature, but as cultural ways of living in the world, evolving with ...
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Journal of Economic Entomology, 1908 (Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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