Cizek, Pavel; Lei, J.; Ligthart, J.E. - Tilburg University, Center for Economic Research - 2012
Abstract: The spatial survival models typically impose frailties, which characterize unobserved heterogeneity, to be spatially correlated. This specification relies highly on a pre-determinate covariance structure of the errors. However, the spatial effect may not only exist in the unobserved...