###
How does AMIP work for regression when the weight vector induces colinearity in the regressors?

How does AMIP work for regression when the weight vector induces colinearity in the regressors? This problem came up in our paper, as well as in a couple users of `zaminfluence`

. Superficially, the higher-order infinitesimal jackknife has nothing to say about such a point, since a requirement for the accuracy of the approximation is that the…