A longitudinal survey of textile and clothing firms in Emilia-Romagna (Italy) was conducted using a ``replenished'' panel survey to produce reliable cross-sectional estimates. The firms (sampling units) were stratified according to size and age, and in all phases, dead and/or emigrated firms were considered as having already left the sample, while new units selected from newborn and immigrant firms, were considered as having already entered the sample. Population dynamics change firm composition over time and the methods of cross-sectional estimation must be adapted to the longitudinal features of the samples.
Un’indagine longitudinale nel settore tessile e abbigliamento: alcuni aspetti del piano di campionamento / Lalla, Michele. - STAMPA. - 2:(1996), pp. 127-134. (Intervento presentato al convegno XXXVIII Riunione Scientifica della SIS tenutosi a Rimini nel 09-13 aprile 1996).
Un’indagine longitudinale nel settore tessile e abbigliamento: alcuni aspetti del piano di campionamento
LALLA, Michele
1996
Abstract
A longitudinal survey of textile and clothing firms in Emilia-Romagna (Italy) was conducted using a ``replenished'' panel survey to produce reliable cross-sectional estimates. The firms (sampling units) were stratified according to size and age, and in all phases, dead and/or emigrated firms were considered as having already left the sample, while new units selected from newborn and immigrant firms, were considered as having already entered the sample. Population dynamics change firm composition over time and the methods of cross-sectional estimation must be adapted to the longitudinal features of the samples.
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