I saw an article from the Washington Post, December 15, 2017, saying the administrative/enforcement branch of the U.S. government is banning the use of certain words or phrases. Two of the phrases include “science-based” and “evidence-based”. As many of you know, I am an active advocate of Evidence Based Valuation.© If valuation based on evidence […]
Is valuation one analysis or two analyses? Traditionally, we have been taught to pick our comps carefully. A comparable is competitive to the subject. A competitive sale is similar to the subject. And a property is similar if it can be compared to the subject. Is that one analysis, or two analyses? From the 1930s […]
Price indexing is a result of a good market analysis. What is it, and how can it help? Price indexing solves many of the problems that the 1004mc was intended to do. It is not difficult to do. The result looks something like this: If you do this using the recommended specific procedure, you will […]
What is an adjustment? In a prior blog, we noted that no one seems to really know! We looked at the AI Dictionary of Real Estate Appraisal. We looked at The Appraisal of Real Estate (TARE). And we looked at the “Uniform” standards. All these sources tell us that adjustments are important and should be […]
Judgment to analysis to science to econometrics? When will this foolishness stop? I liked appraisal the way it used to be. It was slower, but more fun: Pick six or seven comps, go look, take pictures Pick three or four ‘good’ ones. Explain, justify, and support your opinions Then data got easier – on line. […]
Three approaches to value evolved from the scarce data of the last century. With abundant data, three predictive models have evolved. What is the difference? Approaches vs models. The difference is like looking at a cube from the side or from the top. The top gives one view. The side shows another. In fact, they […]
Is it time to recognize the importance of EDA in all valuation products? EDA is Exploratory Data Analysis, sometimes called PDA (Preliminary Data Analysis). Who does it? Is it necessary? And why do we care? EDA (Exploratory Data Analysis) is a key part of the modern, data science solution to value and risk. It’s an […]
Errors and mistakes can be “statistical.” They can be modeling Blunders. Or they can be of a third type: misjudging what the data is showing you. As we continue to grow the CAA (Community of Asset Analysts), we find that our body of useful algorithms and shared programs continues to deepen and widen. The accuracy […]
“A new valuation modeling paradigm” are the words used by the late Dr. Marv Wolverton. He is the author of the Appraisal Institute’s book on statistics for appraisers. He created the term in a response to my peer-reviewed Appraisal Journal article: “Common Statistical Errors and Mistakes: Valuation and Reliability.” The article itself can be summed […]