Most assessing offices still follow the traditional one-step CAMA process. We believe the industry needs a clearer, more disciplined standard.
Today
I am sharing a condensed version of The Ten Commandments of Valuation Modeling on
Substack and Patreon. These ten non-negotiable principles cover everything from
percentile-based sampling and holdout testing to time as an independent
variable, systematic outlier removal, and the validation of OLS assumptions
required for true BLUE status.
The
full 14-page chapter — with detailed explanations and practical guidance — will
appear as Chapter 1 in my upcoming book:
Beyond the Median: How to Unmask the Multi-Million Dollar Appeals
Tsunami in Modern Mass Appraisal
If
you work in assessment, serve on a VAB or Review Commission, or consult in this
space, these Commandments offer a practical code of practice you can apply
immediately.
Read
the condensed version here:
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