Abstract --------------------------- The Quarterly Labour Force Survey (QLFS) is a household-based sample survey conducted by Statistics South Africa (Stats SA). It collects data on the labour mar

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生命历程研究

<p>The <span style="font-style: italic;">1970 British Cohort Study</span> (BCS70) is a longitudinal birth cohort study, following a nationally representative sample of over 17,000 pe

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Belgium European Union Statistics on Income and Living Conditions, Longitudinal Data Collection 2005

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Belgium European Union Statistics on Income and Living Conditions, Longitudinal Data Collection 2005

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