I see at least two twin-adoption studies which deal with adult outcomes (in Ch 2. of Caplan’s book), but I haven’t searched very thoroughly:
(I’ve requested this paper, but don’t yet have it Edit: here it is ). Age differences in genetic and environmental influences for health from the Swedish Adoption/Twin Study of Agings this one has adult outcomes, but Jennifer Harris et al., “Age Differences in Genetic and Environmental Influences for Health from the Swedish Adoption/Twin Study of Aging,” Journal of Geroontology 47 (3) (May 1992), pp. 213-220.
I haven’t gone though all the citations thoroughly though, so there might be more there. You’re right that there doesn’t seem to be that many.
I see at least two twin-adoption studies which deal with adult outcomes (in Ch 2. of Caplan’s book), but I haven’t searched very thoroughly:
(I’ve requested this paper, but don’t yet have it Edit: here it is ). Age differences in genetic and environmental influences for health from the Swedish Adoption/Twin Study of Agings this one has adult outcomes, but Jennifer Harris et al., “Age Differences in Genetic and Environmental Influences for Health from the Swedish Adoption/Twin Study of Aging,” Journal of Geroontology 47 (3) (May 1992), pp. 213-220.
I haven’t gone though all the citations thoroughly though, so there might be more there. You’re right that there doesn’t seem to be that many.
This one talks about adult outcomes, but I can’t find out what ages they’re actually talking about, so it may be that most of them are early in life. Thomas Bouchard et al., “sources of Human Psuchological Differences: The Minnesota Study of Twins Reared Apart,” Science 250 (4978) (October 1990), p. 223.