Hi all,
I would like to react a bit on this issue.
Probably one problem is that the distinction correlation vs.
regression is not the same for independent data and for phylogenetic data.
Consider the case of independent observations first. Suppose we are
interested in the relationship y = b
Maybe what we need here is an approach based on
simultaneous equations (aka structural equation models), but I'm not
aware whether this exists in a phylogenetic framework.
Exactly! And it will need to incorporate measurement error in all variables
as well as, eventually, uncertainly in the
