Thursday, October 22, 2026

Session 5 of the Mass Appraisal Modeling series is now live.

 Sophisticated Model Building – The OLS Champion

We just locked in the final, most sophisticated OLS model in the progressive series—high-cardinality ZIP-code location modeling, disciplined outlier removal, the Principle of Parsimony, near-normal residuals, and practical BLUE status. Plus a first look at how the official assessment roll compares to both sale prices and the model.

This is the Champion.

Session 6 brings the modern ML-friendly One-Hot Encoding Challenger into the ring for a head-to-head ratio study. The finals are coming.

The Executive Summary is free for everyone. Paid subscribers can access the full session.

Link to Patreon Post:

https://www.patreon.com/SidSom/posts/session-5-mass-173095600

#MassAppraisal #PropertyTax #RealEstateAnalytics #Econometrics #DataScience #CAMA #AVM #Valuation #Substack #SaveTheChildren

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Session 5 of the Mass Appraisal Modeling series is now live.

  Sophisticated Model Building – The OLS Champion We just locked in the final, most sophisticated OLS model in the progressive series—high...