Long Weekend 50%-off Charity Flash Sale: 5 Books, 1 Cause!

 For this weekend only, we’re bringing back our 50%-off Charity PDF Download Event on Payhip! Whether you’re looking to master advanced valuation modeling, streamline assessment governance, or dive into non-valuation work, 100% of the proceeds from this campaign go directly to support our charitable cause. Download any (or all!) of these five featured titles as instant PDFs and support a great cause while expanding your library:

1.   Forensic Valuation Modeling: Fixing Costly Errors, Bridging Missing Links 

    Link: https://payhip.com/b/VXhb2

2. Challenging Your Property Assessment: The Art of the Rebuttal (A Comprehensive Guide to Winning Property Tax Appeals)

Link: https://payhip.com/b/01uD3

3.   The Pensionado Path: A Comprehensive Exploratory Guide to Affordable Retirement in Latin America

    Link: https://payhip.com/b/Rsa7w

4.   The Quantitative Investor: Mastering Data-Driven Strategies for Optimal Asset Allocation 

    Link: https://payhip.com/b/VWxul

5.   The Quantitative Country Analyst: A Data-Driven Guide to Global Mobility

    Link: https://payhip.com/b/OK2NM

Coupon Code: CHARITY50

Make an Impact: Every download directly funds our weekend charitable initiative!

Campaign ends Monday at midnight!

If you’ve been meaning to pick them up — or know someone who could benefit — now is a good time.

Thank you for your continued support, advocacy, and dedication to raising the standard of our valuation modeling industry while making a real difference.

Long-Weekend 50%-off Charity Flash Sale: 5 Books, 1 Cause!

For this weekend only, we’re bringing back our 50%-off Charity PDF Download Event on Payhip! Whether you’re looking to master advanced valuation modeling, streamline assessment governance, or dive into non-valuation work, 100% of the proceeds from this campaign go directly to support our charitable cause.

Download any (or all!) of these five featured titles as instant PDFs and support a great cause while expanding your library:

 

1.   Forensic Valuation Modeling: Fixing Costly Errors, Bridging Missing Links (Building More Defensible Models and Achieving BLUE Status) Link: https://payhip.com/b/VXhb2

2. Challenging Your Property Assessment: The Art of the Rebuttal (A Comprehensive Guide to Winning Property Tax Appeals)

Link: https://payhip.com/b/01uD3

3.   The Quantitative Country Analyst: A Data-Driven Guide to Global Mobility

    Link: https://payhip.com/b/OK2NM

4.   The Pensionado Path: A Comprehensive Exploratory Guide to Affordable Retirement in Latin America

    Link: https://payhip.com/b/Rsa7w

5.   The Quantitative Investor: Mastering Data-Driven Strategies for Optimal Asset Allocation

    Link: https://payhip.com/b/VWxul

Coupon Code: CHARITY50

Make an Impact: Every download directly funds our weekend charitable initiative!

Campaign ends Monday at midnight!

If you’ve been meaning to pick them up — or know someone who could benefit — now is a good time.

Thank you for your continued support, advocacy, and dedication to raising the standard of our valuation modeling industry while making a real difference.

Coming September 9th: 101 Key Terms for Valuation Modeling

On September 9th, I’m releasing a new desktop reference built for the people who actually work with valuation models every day.

101 Key Terms for Valuation Modeling: A Practical Desktop Reference for Mass Appraisal, CAMA, and AVM Practitioners

Clear definitions. Practical applications. Practitioner-focused guidance.

Designed as a single, canonized desk reference (~300 pages), this compendium bridges the gap between complex econometric theory and real-world roll defense.

Each of the 101 core terms follows a consistent three-part structure so you can move quickly from meaning → modeling use → real-world application. Closely related concepts are presented as split entries for easy comparison, and the book includes specialized appendices with defense scripts, forensic audit terms, real estate finance terms, and more—plus a full A–Z index for fast lookup.

This one is designed to stay on your desk, not collect dust on a shelf.

Launching September 9th.

More details coming soon.

#MassAppraisal #CAMA #AVM #ValuationModeling #Assessment

Weekend 50%-off Charity Flash Sale: 5 Books, 1 Cause!

 For this weekend only, we’re bringing back our 50%-off Charity PDF Download Event on Payhip! Whether you’re looking to master advanced valuation modeling, streamline assessment governance, or dive into non-valuation work, 100% of the proceeds from this campaign go directly to support our charitable cause.

Download any (or all!) of these five featured titles as instant PDFs and support a great cause while expanding your library:

1.   A Beginner’s Guide to Automated Valuation Modeling (AVM): Step-By-Step Demonstration of Model Development with Real-World Data and Numerous Illustrations

Link: https://payhip.com/b/cxh7q

2.   From Basics to Breakthroughs: A Beginner's Journey in Data Analysis and Modeling in Excel

Link: https://payhip.com/b/QSqXK

3.   Valuation Modeling: The Perfect Crossover between AVM and CAMA

Link: https://payhip.com/b/3G9gs

4.   The Gospels Reimagined: A Modern Lens on the Life and Legacy of Jesus

Link: https://payhip.com/b/MPVri

5.   Tax Justice: A Blueprint for Replacing Property Taxes with Middle-Class-Friendly Reforms

Link: https://payhip.com/b/shTKm

Coupon Code: CHARITY50

Make an Impact: Every download directly funds our weekend charitable initiative!

Campaign Ends Sunday at Midnight!

If you’ve been meaning to pick them up — or know someone who could benefit — now is a good time.

Thank you for your continued support, advocacy, and dedication to raising the standard of our valuation modeling industry while making a real difference.

Weekend Charity Flash Sale: 5 Books, 1 Cause!

For this weekend only, we’re bringing back our Charity PDF Download Event on Payhip! Whether you’re looking to master advanced valuation modeling, streamline assessment governance, or dive into non-valuation works, 100% of the proceeds from this campaign go directly to support our charitable cause.

Download any (or all!) of these five featured titles as instant PDFs and support a great cause while expanding your library:

1. Making Valuation Modeling (AVM and CAMA) More Econometric
Link: https://payhip.com/b/QU4j1
2. Equalization Valuation Modeling (EVM) for Smaller and Mid-Sized Jurisdictions: Foundations & Model Development
Link: https://payhip.com/b/8foNn
3. A Beginner's Guide to Hands-on Statistical Analysis and Modeling in Excel with Housing Case Studies
Link: https://payhip.com/b/WFIgJ
4. The Quantitative Country Analyst: A Data-Driven Guide to Global Mobility
Link: https://payhip.com/b/OK2NM
5. For the Dreamers: A Practical Guide to Turning Vision into Victory
Link: https://payhip.com/b/cjlwU

Coupon Code: CHARITY50

Make an Impact: Every download directly funds our weekend charitable initiative!

Campaign Ends Sunday at Midnight!

Thank you for your continued support, advocacy, and dedication to raising our industry's standards while making a real difference.

Weekend Charity Campaign – 50% Off

This weekend only, I’m offering 50% off the PDF editions of five of my books — a mix of practical valuation modeling and market analysis titles.

All proceeds support charities, including Save the Children.

Titles included (PDF download via Payhip):

• A Beginner’s Guide to Automated Valuation Modeling (AVM)

Link: https://payhip.com/b/cxh7q

• Navigating the Data Revolution: A Playbook for Independent Financial Advisors

Link: https://payhip.com/b/RX6uh

• The Nomad's Compass: A Data-Driven Guide to Global Retirement and Investment

Link: https://payhip.com/b/G1a8u

• The Quantitative Investor: Mastering Data-Driven Strategies for Optimal Asset Allocation

Link: https://payhip.com/b/VWxul

• Country Analysis: Decoding the World with Data

Link: https://payhip.com/b/agvPS

Coupon Code: CHARITY50

Direct download via Payhip – no waiting, no complicated checkout.

All proceeds from these books support charities, including Save the Children. Campaign runs through Sunday night only.

If you’ve been meaning to pick them up — or know someone who could benefit — now is a good time.

Thank you for your support.

Sid

50% Off This Weekend Only – Five Practical Valuation Modeling Books

This weekend only, I’m running a straightforward 50% off campaign on the PDF editions of my five most recent valuation modeling books.

These are practical, practitioner-focused titles written specifically for assessors, valuation modelers, VAB members, review appraisers, and consultants who deal with mass appraisal, ratio studies, equity analysis, and regression-based valuation every day.

Titles included (all PDF):

1. Beyond the Median: How to Unmask the Multi-Million Dollar Appeals Tsunami in Modern Mass Appraisal

Link: https://payhip.com/b/PcIyf

2. Forensic Valuation Modeling: Fixing Costly Errors, Bridging Missing Links

Link: https://payhip.com/b/VXhb2

3. Challenging Your Property Assessment: The Art of the Rebuttal (A Comprehensive Guide to Winning Property Tax Appeals)

Link: https://payhip.com/b/01uD3

4. Enhancing High-Volume Comparable Sales Processing with Regression Models

Link: https://payhip.com/b/tKQ8p 

5. The Art and Science of Comparable Sales Analysis

Link: https://payhip.com/b/DdgCA

50% off for the next 48 hours only. Coupon Code: CHARITY50

Direct download via Payhip – no waiting, no complicated checkout.

All proceeds from these books support charities, including Save the Children.

If you’ve been meaning to pick them up, or if you know a colleague who is wrestling with model diagnostics, homestead interactions, time adjustments, or equity challenges, this is the easiest time to do it.

Campaign ends Sunday night.

Thank you for the continued interest in our work.

Sid

The momentum is building: Beyond the Median is officially live!

 Most Tentative Rolls look fine… until the appeals start.

The traditional one-step CAMA model generates Just Values across the entire roll using a sales-based approach — then stops. No further population-level checks. No systematic way to catch the hidden distortions that quietly build into multi-million dollar problems.

Beyond the Median was written to change that.

It shows assessing professionals, VAB members, and consultants how to:

·  Apply The Ten Commandments of Valuation Modeling as a practical code of practice

·  Use extended percentile analysis (10th–90th) to reveal what the median hides

·  Spot location-based and ownership-based inequity before the roll is finalized

·  Strengthen the Tentative Roll without waiting for a full system overhaul

This is not another theoretical modeling book. It is a practical field guide for people who have to defend the numbers.

Now available on Amazon (Kindle, Paperback, Hardcover) and Payhip (PDF).

Payhip (PDF Edition):

https://payhip.com/b/PcIyf

Amazon (Kindle, Paperback, and Hardcover):

https://www.amazon.com/dp/B0HCJY2X2K

All proceeds support charitable causes.

#MassAppraisal #CAMA #PropertyAssessment #ValuationModeling

NOW LIVE | Beyond the Median: How to Unmask the Multi-Million-Dollar Appeals Tsunami in Modern Mass Appraisal

Beyond the Median is officially published!

I’m pleased to announce that my new book is available:

Beyond the Median: How to Unmask the Multi-Million Dollar Appeals Tsunami in Modern Mass Appraisal

Today marks a critical shift in how we evaluate, audit, and defend property tax assessment rolls.

For decades, assessing offices and valuation professionals have taken shelter behind a single statistical shield: aggregate central tendency. As long as median ratios hover near 1.00 and overall Coefficients of Dispersion (COD) meet basic benchmarks, assessment rolls are certified as compliant.

The uncomfortable truth? A healthy median is often a dangerous illusion.

Beneath smooth aggregate averages, traditional single-entry CAMA models (a sales-based approach that generates Just Values across the entire Tentative Roll with limited population-level checks and balances) routinely embed a silent, structural "double whammy":

1.   Severe over-assessment concentrated on entry-level and lower-value homes—triggering an uncontrollable tsunami of tax appeals and Value Adjustment Board petitions.

2.   Massive under-assessment on luxury and high-end assets—allowing billions in baseline property tax wealth to vanish untaxed.

What You Will Learn in Beyond the Median

This book moves past surface-level metrics to deliver an immediately usable, mathematically defensible, non-black-box solution that requires zero changes to existing CAMA software:

· The Double-Entry Mass Appraisal (DEMA™) Framework: A practical two-step population calibration model to audit and equalize values outside legacy software.

· The Ten Commandments of Valuation Modeling: A complete specification protocol enforcing strict data sanity, dual variable governance, simultaneous time parameterization, and formal OLS assumption testing for true BLUE status.

· Extended Percentile Audits & Champ-Challenger Diagnostics: How to use 10th-to-90th percentile audits to identify hidden tail skewness and pit legacy CAMA models ("the Champ") against population-calibrated econometric engines ("the Challenger").

Get Your Copy Today

Payhip (PDF Edition):

https://payhip.com/b/PcIyf

Amazon (Kindle, Paperback, and Hardcover):

https://www.amazon.com/dp/B0HCJY2X2K

Thank you to everyone in the mass appraisal, AVM, and property tax communities for your ongoing support, feedback, and dedication to constitutional valuation equity.

Let’s move beyond the median together.

#MassAppraisal #AVM #CAMA #PropertyTax #Econometrics #RealEstateValuation #AssessmentEquity #PublicFinance #BeyondTheMedian #BookLaunch #SaveTheChildren #DataAnalytics

TOMORROW: The wait is over.

For years, the mass appraisal and property tax industry has relied on a dangerous assumption: If the median ratio looks good, the assessment roll is fair.

Tomorrow, we shatter that illusion.

Beyond the Median: How to Unmask the Multi-Million Dollar Appeals Tsunami in Modern Mass Appraisal officially goes live tomorrow, Sunday, August 2nd!

In this book, we step beyond aggregate central tendency to expose the silent "double whammy" hidden inside traditional single-entry CAMA models—where lower-value homes face systemic over-assessment while luxury assets carry massive untaxed cushions.

More importantly, this volume delivers an immediately actionable, non-black-box solution:

·   The Double-Entry Mass Appraisal (DEMA™) Framework

·   The Ten Commandments of Valuation Modeling

·   Extended Percentile Ratio Auditing & Champ-Challenger Diagnostics

Whether you are a chief appraiser, assessment analyst, appeal attorney, mass appeal consultant, or public finance official, this playbook gives you the tools to unmask roll distortions, restore constitutional equity, and stop tax appeal waves before they start.

Keep an eye on this feed tomorrow morning for the official release link and launch announcement!

#MassAppraisal #AVM #CAMA #PropertyTax #Econometrics #RealEstateValuation #AssessmentEquity #PublicFinance #BeyondTheMedian #BookLaunch

COMING SOON | Beyond the Median: How to Unmask the Multi-Million Dollar Appeals Tsunami in Modern Mass Appraisal

For decades, assessing offices and valuation professionals have taken shelter behind a single statistical shield: aggregate central tendency.

Chief appraisers and oversight boards point to neat median ratios near 1.00 and low CODs to certify tentative rolls, declaring statistical compliance accomplished. But in today’s volatile property tax environment, a healthy median is a dangerous illusion.

Beneath smooth central averages, traditional one-step CAMA models (sales-based models generating the Tentative Rolls) routinely embed a silent "double whammy":

1.   Severe over-assessment concentrated on lower-value and working-class properties—triggering an uncontrollable tsunami of tax appeals and Review Commission / Value Adjustment Board petitions.

2.   Massive under-assessment on high-end luxury and commercial assets—allowing billions in baseline property tax wealth to vanish untaxed.

It’s time to look beyond the median.

My upcoming book drops this Sunday, August 2nd!

In this book, I introduce the practical, two-step Double-Entry Mass Appraisal (DEMA™) framework and The Ten Commandments of Valuation Modeling. We show how assessing staff can use extended percentile audits and the Champ-Challenger approach to unmask hidden roll distortions—offering an immediately usable stop-gap solution that requires zero changes to existing CAMA workflows.

#MassAppraisal #AVM #CAMA #PropertyTax #Econometrics #RealEstateValuation #AssessmentEquity #PublicFinance 

Coming Soon | Beyond the Median: How to Unmask the Multi-Million Dollar Appeals Tsunami in Modern Mass Appraisal

Beyond the Median: How to Unmask the Multi-Million Dollar Appeals Tsunami in Modern Mass Appraisal

Most assessing offices still rely on the traditional one-step CAMA model. The sales-based approach generates Just Values across the entire Tentative Roll with limited population-level checks and balances.

The result? Hidden distortions that quietly build into multi-million (and sometimes multi-billion) dollar appeals and ratio challenges.

This book introduces a practical path forward:

·        The Ten Commandments of Valuation Modeling

·        Extended percentile analysis that reveals what the median hides

·        A clear two-step framework that strengthens the Tentative Roll before it becomes final

Whether you work in assessment, serve on a VAB or Review Commission, or consult in this space, this book is written for you.

Coming Sunday, August 2.

Stay tuned.

#AVM #CAMA #DEMA #IAAO #USPAP #MassAppraisal #PropertyTax #RegressionModeling #ValuationModeling