Session 7 of the Mass Appraisal Modeling series is now live.
Most CAMA models—including many delivered by outside consultants—never undergo proper OLS assumption testing. They routinely skip linearity, constant residual variance, residual normality, and multicollinearity. Assessors and junior analysts often receive opaque models with little visibility into whether classical econometric assumptions hold. When a high-stakes Value Adjustment Board hearing arrives, that lack of proof leaves jurisdictions exposed.
This session walks through the four most often neglected assumption tests, using clear, practitioner-friendly
diagnostics that new analysts can calculate and defend.
The Executive Summary is free for everyone.
Paid subscribers can access the full session.
Read Session 7 now on Substack!
https://sidsom.substack.com/p/session-7-ols-assumption-tests-for
#MassAppraisal #Econometrics
#PropertyTax #AVM #ValuationDefense #VABAppeals #DataScience #OLSRegression
#IAAO#USPAP
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