The researchers say they tend to be older – half are aged between 50 and 69 – though this may reflect the fact that some of the investments covered by the survey date back to the 1980s.
If the economy has weakened during the window between the end of the year and the survey date, some respondents may incorrectly describe their income from their previous year.
Patients present on the survey date were included.
For comparison purpose, we selected the Italian survey closest to the French survey date.
Unfortunately, the census does not allow us to identify international migratory activities beyond the 5 years prior to the census's survey date.
The study demonstrated a positive relationship between the cover of entomophilous plant species that were flowering at the survey date and response variables related to herbivore regulation.
The different remote sensing sensors, platforms and DEM reconstruction algorithms result in DEM products with different properties in terms of spatial extent, resolution, accuracy, survey date, and whether they represent digital surface model (DSM) or bare ground.
Finally, we scrutinized, using the manual review process described above, a subset of cases that responded to the three-year follow-up survey but had a survey date greater than the last PFD linkage date (n = 23).
All the citizens of the 13 selected neighbourhoods of Arequipa have been informed of the survey (date and time of the survey) by the local councillor and have been called to participate on a voluntary basis.
Responses were included for up to five previous births, occurring from 2001 to the survey date.
We addressed this problem in the analysis by excluding children born more than five years before the survey date.
