Blog Archives

The Network Underlying Consumer Perceptions of the European Car Market

October 13, 2015
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The Network Underlying Consumer Perceptions of the European Car Market

The nodes have been assigned a color by the author so that the underlying distinctions are more pronounced. Cars that are perceived as Economical (in aquamarine) are not seen as Sporty or Powerful (in cyan). The red edges connecting these attributes in...

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The Graphical Network Associated with Customer Churn

October 8, 2015
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The Graphical Network Associated with Customer Churn

The node representing "Will Not Stay" draws our focus toward the left side of the following undirected graph. Customers of a health care insurance provider were asked about their intentions to renew at the next sign-up period. We focus on those indicat...

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Undirected Graphs When the Causality Is Mutual

October 5, 2015
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Undirected Graphs When the Causality Is Mutual

Structural equation models impose causal order on a set of observations. We start with a measurement model: a list of theoretical constructs and a table assigning what is observed (manifest) to what is hidden (latent). Although it is possible to think ...

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Matrix Factorization Comes in Many Flavors: Components, Clusters, Building Blocks and Ideals

August 6, 2015
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Matrix Factorization Comes in Many Flavors: Components, Clusters, Building Blocks and Ideals

Unsupervised learning is covered in Chapter 14 of The Elements of Statistical Learning. Here we learn about several data reduction techniques including principal component analysis (PCA), K-means clustering, nonnegative matrix factorization (NMF) ...

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Sensemaking in R: A Plenitude of Models Makes for Good Storytelling

August 3, 2015
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Sensemaking in R: A Plenitude of Models Makes for Good Storytelling

"Sensemaking is a motivated, continuous effort to understand connections (which can be among people, places, and events) in order to anticipate their trajectories and act effectively."- Gary Klein, Brian Moon & Robert HoffmanMaking Sense of Sensema...

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But I Don’t Want to Be a Statistician!

July 29, 2015
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But I Don’t Want to Be a Statistician!

"For a long time I have thought I was a statistician.... But as I have watched mathematical statistics evolve, I have had cause to wonder and to doubt.... All in all, I have come to feel that my central interest is in data analysis...."Opening paragrap...

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Statistical Models of Judgment and Choice: Deciding What Matters Guided by Attention and Intention

July 27, 2015
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Statistical Models of Judgment and Choice: Deciding What Matters Guided by Attention and Intention

Preference begins with attention, a form of intention-guided perception. You enter the store thirsty on a hot summer day, and all you can see is the beverage cooler at the far end of the aisle with your focus drawn toward the cold beverages that you im...

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"Models, Models Everywhere!" Brought to You by R

July 21, 2015
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"Models, Models Everywhere!" Brought to You by R

Statistical software packages sell solutions. If you go to the home page for SAS, they will tell you upfront that they sell products and solutions. They link both together under the first tab just below "The Power to Know" mantra. SPSS separates produc...

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Seeing Data as the Product of Underlying Structural Forms

July 15, 2015
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Seeing Data as the Product of Underlying Structural Forms

Matrix factorization follows from the realization that nothing forces us to accept the data as given. We start with objects placed in rows and record observations on those objects arrayed along the top in columns. Neither the objects nor the measuremen...

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The Ecology of Local Subspaces: Mixtures of Parochial Views

July 9, 2015
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The Ecology of Local Subspaces: Mixtures of Parochial Views

No matter where you live, your view of the world is biased and limited, which is the beauty of this magazine cover.As a marketer, of course, all my maps depict, not place, but consumption. For example, in an earlier post I asked, "What apps are on your...

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