Relational arrays represent interactions or associations between pairs of actors, often over time or in varied contexts. We focus on the case where the elements of a relational array are modeled as a linear function of observable covariates. Due to the inherent dependencies among relations involving the same individual, standard regression methods for quantifying uncertainty in the regression c...

Learning about statistics is a lot like learning about science: the learning is more meaningful if you can actively explore. This series in Advances in Physiology Education provides an opportunity to do just that: we will investigate basic concepts in statistics using the free software package R. Because this series uses R solely as a vehicle with which to explore basic concepts in statistics, ...

The Frisch–Waugh–Lovell Theorem states the equivalence of coefficients from full and partial regressions. I further show between various standard errors. Applying new result to stratified experiments reveals discrepancy model-based design-based

Abstract Clustered standard errors, with clusters defined by factors such as geography, are widespread in empirical research economics and many other disciplines. Formally, clustered errors adjust for the correlations induced sampling outcome variable from a data-generating process unobserved cluster-level components. However, econometric framework clustering leaves important questions unanswer...