1. Comparing rotational patterns with regard to attrition. 17/18 May 2018
Comparing rotational patterns with regard to attrition /18 May LFS Workshop Reykjavík

2. Motivation
LFS rotational pattern = f(desired precision quarterly, annual estimates; cost & burden) Other factors: mode, legal requirements, attrition past/other surveys No recommendations on ideal pattern – link between attrition and rotational pattern that can be used for decision making?

3. Group for purpose of analysis
Overview of rotational patterns
Rotational pattern
Country
Group for purpose of analysis
2 in 2 out 2 in
BG,DK,EE,HR,IT,LV,LT,MT,PL,RO,(BE) 1
5 in
CZ, IE, NL, AT, SK, UK, (LU) 2
6 in
EL,ES,FR,CY,HU,PT
8 in
SE, (NO)
3 in 1 out 2 in
SI, FI
3 in 2 out 2 in
(IS)

4. Average attrition rates 2016, in %; sorted by quarterly rates

5. Differential attrition
Binomial regression, match=1
Regressors: unemployment, age<30, city; interactions
Derive attrition rate by category
Compare to average attrition:
average attrition-category attrition

7. Link between rotational pattern and attrition?
Dependent variable: Average quarterly attrition, average annual attrition, maximum pp difference in av.- factor attrition (q/a) Explanatory variables: Rotational pattern, data collection mode, compulsory participation, EU-SILC attrition( average)

8. Regression results
 cannot confirm impact of rotational pattern on attrition