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  • Nature Publishing Group  (7)
  • Blackwell Publishing Ltd  (1)
  • 1970-1974  (3)
  • 1955-1959  (5)
  • 1935-1939
  • 1
    Digitale Medien
    Digitale Medien
    DATA REVISIONS AND FORECASTING ACCURACY: AN ECONOMETRIC ANALYSIS BASED ON PRELIMINARY AND REVISED NATIONAL ACCOUNTING ESTIMATES (1973)
    Oxford, UK : Blackwell Publishing Ltd
    Review of income and wealth 19 (1973), S. 0 
    Details
    ISSN: 1475-4991
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: This paper entails an investigation of the effects of data revisions on forecasting accuracy, through use of preliminary and revised national accounting data compiled by the United Nations. A small model was estimated for each of fourteen countries and ex post“forecasts” generated for each country and each year of the period 1957–1964, using first preliminary and then revised data.A prior analysis of the data revisions indicated a strong and widespread tendency for the preliminary estimates to understate both levels and year-to-year changes. This is consistent with the findings of other studies.Two sets of forecasts obtained from the reduced form of the model were considered in relation to “actual” levels and changes, obtained from the revised data, and also in relation to each other. A strong downward bias was observed in the forecasts of levels based on preliminary data, and a weaker one in the forecasts of changes. The forecast discrepancies for different variables were found to be significantly correlated.The results suggest that a tendency toward understatement in preliminary data may account in part for the general tendency toward understatement in forecasts noted in other studies.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1475-4991.1973.tb00901.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Buoyancy of the Cuttlefish (1959)
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 1330-1331 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The cuttlebone's structure is well described by Appellof1. In a large adult it consists of about one hundred lamellae of calcified chitin placed one above the other and held about two-thirds of a millimetre apart by vertical pillars. The spaces between these lamellae form independent chambers which ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/1841330a0
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Mechanism of Action of Luteinizing Hormone (1970)
    [s.l.] : Nature Publishing Group
    Nature 228 (1970), S. 376-377 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Slices of the luteinized ovaries from immature Wistar rats treated with pregnant mare serum gonadotrophin and human chorionic gonadotrophin3'4 were incubated for 1 h at 37° C in Krebs-Ringer bicarbonate buffer containing 3H-water and 14C6-sorbitol with or without glucose (1 mg/ml.). Luteinizing ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/228376a0
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Algae as Nutrient Material for studying Ca-Sr Relationships in Heterotrophic Organisms (1970)
    [s.l.] : Nature Publishing Group
    Nature 227 (1970), S. 1161-1163 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The feasibility of such a use for the alga, however, depends on several suppositions. The first is that the alga will provide all the organic nutrients needed by the heterotroph; second, that the alga in Sr, except for its lack of Ca, would be as suitable a source of nutrients for the heterotroph ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/2271161b0
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Bathyscaphoid Squid (1958)
    [s.l.] : Nature Publishing Group
    Nature 182 (1958), S. 1810-1811 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] These mid-water squid had enormous body cavities filled with fluid1. When the fluid, and it amounted to two-thirds of the squid s volume, was drained the squid sank; this showed that the buoyancy of the intact animals was given by the low densities of their coelomic fluids. From the volumes of ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/1821810b0
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    A Gregarious Factor in the Natural Conditioned Salivary Reflexes of Sheep (1957)
    [s.l.] : Nature Publishing Group
    Nature 179 (1957), S. 341-344 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] LORENZ1 has pointed out considerable limitations in the knowledge likely to accrue from the Pavlovian type of experiment on conditioned reflexes. Principally, these stemmed from the fact that the animal was isolated from stimuli other than the one chosen by the experimenter, and this restraint ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/179341a0
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Visual Pigments of Deep-Sea Fish (1956)
    [s.l.] : Nature Publishing Group
    Nature 178 (1956), S. 1059-1059 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Simple visual inspection showed that the unbleached retinae were golden coloured. Fig. 1 demonstrates that the changes in spectral absorption on bleaching such retinas were those of retinal photosensitive pigments differing from visual purple in having their maxima displaced about 20 mµ ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/1781059a0
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Delayed Effect of Ipsilateral Intracarotid Infusion of Sodium Chloride on the Composition of the Parotid Saliva of Sodium-depleted Sheep (1956)
    [s.l.] : Nature Publishing Group
    Nature 177 (1956), S. 1035-1036 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] During the investigation of this aspect of parotid secretion, we have observed the effect of infusing a concentrated solution of sodium chloride into the ipsilateral carotid artery of sodium-depleted sheep. This caused, after a time delay of 100-150 min., a rapid increase in the ratio ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/1771035a0
    Standort Signatur Erwartet Verfügbarkeit
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