matching

1. Q: to match or not to match?
A: it depends - what study design?
a) advantages
b) disadvantages

2. how to match - types of matching
a) frequency matching
b) individual

in case-control studies - Does the ratio case vs control 1:n matter? the more the better?

overmatching - cf twin studies?

terms:
counter-matching - *********counter-matching Langholz 2001, 2005
flexible matching
optimal ?
propensity score matching

matching in genetic association studies
- aim - to avoid population stratification ???
genomic control
admixture