![](https://blogs.sas.com/content/subconsciousmusings/files/2017/03/parameter-estimates-for-a-SAC-model.png)
A previous post, Spatial econometric modeling using PROC SPATIALREG, introduced the SAS/ETS® SPATIALREG procedure and demonstrated its usage to fit both linear and SAR models by using 2013 county-level home value data in North Carolina. In most analysis for spatial econometrics, you rarely know the true model from which your data