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22nd March 2012 3pm, University of Southampton, 58/1009
Laurent Toulemon, Institut national d'etudes demographiques (INED)
Usually, and especially for census purposes, people are considered to be members of one and only one household. Nevertheless, some people have more than one usual residence. I will discuss first how to define these situations of "commuting between households", and how to identify those commuters (period of time considered, definition of a usual residence). In France many surveys conducted by the national institute of statistics (INSEE) include a standard list of residents including all household members who spend at least one month per year in a residence, with some questions on their other places of residence. In survey samples, the prevalence is around 7% of people in private households; 10% of households include at least one person who has a second residence.
Taking double counting into account, the prevalence at the individual level is between 3% and 4%, with a peak frequency at 20 years of age and a secondary mode at ages 55-75, but without major differences between men and women. The family situations related to multiple residence are very diverse, and are strongly associated with age. I will give some examples of family situations for which we not only need to correct the weights, but also to consider all the places of residence in order to describe the current situation accurately: children whose parents are separated, adults living alone.
Finally, I will show that many of our usual statistics become problematic when we want to include multiple residences explicitly, at the individual level or for some other social units (siblings, couple, household, etc.). Going back to the issue of data collection, I will present a new survey carried out within the 2011 French census that includes questions on multiple residence similar to those usually included in household surveys.
Download Presentation File 1 (mp4 format)