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Re: st: Longitudinal sampling (many waves)

From   Stas Kolenikov <>
Subject   Re: st: Longitudinal sampling (many waves)
Date   Mon, 19 Mar 2012 13:29:13 -0400

Larry Ernst of BLS made some highly technical contributions to the
problem of sampling from frames that change over time; see I don't know if
it is relevant to Laurie's request, but there are some highly
sophisticated techniques that ensure that the sample is as efficient
(I hate the word "representative", as it does not really mean
anything) with respect to the contemporaneous population as possible.

On Mon, Mar 19, 2012 at 1:14 PM, Steve Samuels <> wrote:
> For longitudinal analyses, no simple sampling plan will compensate for attrition.  You would have to take in each period a new sample of continuing units who "resemble" those lost in the period with respect to entry date and other characteristics.  Re-weighting the continuing sample members is preferable, I think; propensity score and weighting class approaches are both popular.

Stas Kolenikov, also found at
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