Creating and managing spatial-weighting matrices with the spmat command

Abstract

We present the spmat command for creating, managing, and storing spatial-weighting matrices, which are used to model interactions between spatial or more generally cross-sectional units. spmat can store spatial-weighting matrices in a general and banded form. We illustrate the use of the spmat command and discuss some of the underlying issues by using United States county and postalcode-level data. © 2013 StataCorp LP.