Hi. I am using the European Values Survey (3rd wave and 4th wave) and run multilevel models separately with EVS3 and EVS4 (two separate analyses). I chose not to pool the two waves because most previous studies related to my topic don't pool the different waves and just use only one wave or conduct separate analysis for each wave. What is the best practice for pooling or not pooling the different rounds of mass opinion surveys? What is the basis of your judgement?
I use the mixed model or multilevel approach which is an adaptive procedure that partially pools
http://modernstatisticalworkflow.blogspot.co.uk/2016/11/random-effects-partial-pooling-and.html
and here it is in action
Article Investigating the Macro Determinants of Self-Rated Health an...
which shows it is possible to estimate an overall model and see how things have change by wave.
Thank you so much Kelvyn for sharing your article and the link. I will carefully look at them. Thank you again for your valuable information.
Technically, if the population is Homogeneous, then pooling should be possible and will work.
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