A Census of a nation’s people and housing provides statistics about its health, income and social structures at a local level. While the demand for these statistics is unchanged the way they are collected is changing in many nations because of common drivers: cost pressure, web-based collection, decreasing response rates, environmental shocks and the availability of administrative data. Within this context, this paper gives an overview of the evolution of the Census in Israel, Italy, New Zealand, and the United Kingdom and thereby provides an insight of the challenges and solutions of the modern Census.
The increasing availability of registers or administrative archives has been a strong push towards moving from traditional censuses to combined censuses or even completely register based censuses. In this context, a statistical framework needs to be designed in order to delineate all the statistical issues of the new estimation process. To this aim, a population frame needs to be defined for both surveying and estimation phases. Sampling surveys should be designed for quality assessment and for improving the quality of the register based estimation process. Drawing on similar experiences, a formalisation of the population size estimation process fully based on administrative data is presented. An application to Italian estimation process is reported.
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