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Multilingual Demographic Dictionary, second unified edition, English volume

Difference between revisions of "Period of observation"

Multilingual Demographic Dictionary, second unified edition, English vol.
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(Etienne van de Walle et al., second 1982 edition)
(Etienne van de Walle et al., second 1982 edition)
 
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[[en-II:period of observation]] [[ar-II:حقية المشاهدة]] [[cs-II:období, pozorování]] [[de-II:Beobachtungszeitraum]] [[es-II:período de observación]] [[fr-II:période d’observation]] [[it-II:periodo di osservazione]] [[ja-II:観察期間]] [[pt-II:periodo de observação]] [[ru-II:Период наблюдения]] [[zh-II:观察时期]]  
 
[[en-II:period of observation]] [[ar-II:حقية المشاهدة]] [[cs-II:období, pozorování]] [[de-II:Beobachtungszeitraum]] [[es-II:período de observación]] [[fr-II:période d’observation]] [[it-II:periodo di osservazione]] [[ja-II:観察期間]] [[pt-II:periodo de observação]] [[ru-II:Период наблюдения]] [[zh-II:观察时期]]  
 
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[[Category:Term of the second edition of the multilingual demographic Dictionary]]
 
[[Category:Term of the second edition of the multilingual demographic Dictionary]]

Latest revision as of 05:55, 5 February 2010

Period of observation  (PERIOD of observation)


Demographic indices (132-7) will in most cases relate to a particular period of observation 1 ; this is true in particular of most rates (cf. 133-4). An annual rate 2 will relate to a period of twelve months. Where observations are collected for a number of years and then averaged, the term mean annual rate 3 or average annual rate 3 is often used for the result. Where rates are calculated for periods different from a year they are converted to an annual basis 4 through multiplication by an appropriate factor. Instantaneous rates 5 are sometimes computed; they relate to an infinitesimal period of time, cf. for instance the instantaneous death rate (431-4) or the instantaneous rate of population growth (702-5). More...