  This article provides a selective review on the recent literature on
econometric models of network formation. The survey starts with a brief
exposition on basic concepts and tools for the statistical description of
networks. I then offer a review of dyadic models, focussing on statistical
models on pairs of nodes and describe several developments of interest to the
econometrics literature. The article also presents a discussion of non-dyadic
models where link formation might be influenced by the presence or absence of
additional links, which themselves are subject to similar influences. This is
related to the statistical literature on conditionally specified models and the
econometrics of game theoretical models. I close with a (non-exhaustive)
discussion of potential areas for further development.
