Template-type: ReDIF-Paper 1.0
Author-Name: Sala, Emanuela
Author-Name: Lillini, Roberto
Title: The impact of unlisted and no-landline respondents on non-coverage bias. The Italian case
Abstract: To survey the general population, survey agencies often use sampling frames of landline numbers. However, these frames may exclude a relevant share of the target population. In 2012, 50% of Italian adults are excluded from the sampling frame, as they are unlisted (UN) or do not own a landline telephone (NT). Using a unique national survey with full-coverage of the Italian population, our study describes the changes in the composition of landline telephone coverage over time and investigates differences in demographic and socio-economic characteristics between (i) respondents included in and excluded from the sampling frame and (ii) NT and UN respondents. It also explores whether these differences lead to under-coverage bias and evaluates the impact of current post-adjustment strategies on the total under-coverage bias as well as on its two components separately.

Creation-Date: 20140414
Number: 2014-16
Publication-Status: published
File-URL: https://www.iser.essex.ac.uk/wp-content/uploads/files/working-papers/iser/2014-16.pdf
File-Format: Application/pdf
Handle: RePEc:ese:iserwp:2014-16