The Final Call: Is Legacy CAMA Surviving the Audit?

For decades, the entrenched legacy mass appraisal system has been the undisputed Champ of property tax administration—heavy, rigid, and legally anchored. But a single-entry Champ cannot survive a double-entry world.

Today, we are dropping the final teaser for Session 4B, and the numbers leave the old guard with nowhere to hide. When you run raw, population-level data through a single regression model without a dual-pass accounting audit, the Single-Entry Mass Appraisal splits your jurisdiction right down the middle:

·  In-Town: Property values are systematically overestimated relative to our model. Homeowners inside the town are being over-assessed and over-taxed.

·  The Suburbs: Property values are systematically underestimated, granting an artificial valuation discount and leaking massive institutional revenue.

There is a new kid in town. The Challenger—the DEMA™ Protocol—has officially stepped into the ring.

Double-Entry Mass Appraisal (DEMA™) doesn’t illegally alter the official record. Instead, it acts as an agile, independent forensic audit that exposes exactly where the Champ's blind spots are, turning neighbors against each other and setting the stage for an econometric equalization of the tax roll.

The talk on the street is changing, and the old single-entry playbook is officially on notice. This is your last chance to unpack the structural distortions of Session 4B before we move to the final reconciliation.

Read the final Session 4B analysis and watch the Challenger land the ultimate econometric punch:

Link to the Substack Post

Link to the Patreon Post

If you work in assessing, serve on a VAB or Review Commission, or consult in this space, DEMA™ offers a practical path to stronger rolls and fewer appeals.

Tag colleagues who should see this series:

#DEMA #CAMA #DataScience #Econometrics #IAAO #MassAppraisal #RegressionModel #PropertyTax #ValuationModeling #HorizontalEquity #TaxLitigation