الفهرس 
تمهيديوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
The main cause of errors in population projection during the last decades has been demographers lack of success in correctly prediciting human behavior. Cohort analysis is a useful tool for examining changes and predicting in human behavior, especially for recent cohorts, however, that observations are always incomplete.