News

June 15, 2018

Talk at Università di Padova: "Explaining, Predicting, Describing"

I'll be giving a seminar talk today at University of Padova's Department of Statistical Science (Il Dipartimento di Scienze Statistiche dell'Università di Padova) titled Statistical Modeling in 3D: Describing, Explaining and Predicting. In this talk I extend beyond "explain or predict" to also compare and contrast with "describe".

Where: University of Padova, Aula Benvenuti, Campus S. Caterina 

When: June 15, 2018, 12:30pm


May 10, 2018

Keynote at Galilee Quality Conference (Israel) on Behavioral Big Data: Why Quality Engineers Should Care?

On May 24, 2018 @ 9:30am, I'll deliver a keynote talk on Behavioral Big Data: Why Quality Engineers Should Care? at the upcoming 10th Galilee Quality Conference at ORT Braude College of Engineering, Israel. The talk will be in English.

On the same day, at 11:20 I will also co-instruct with Ron Kenett a workshop (in Hebrew) on the topic: Information Quality: What have you learned from your data?

For details on exact times and locations, see the conference program


May 10, 2018

Talk at Israel Neaman Institute on Behavioral Big Data in Healthcare

I'll be giving an invited talk on Behavioral Big Data Research in Healthcare: Challenges and Opportunities at the Samuel Neaman Institute for National Policy Research at the Technion, Israel, on Tuesday, May 29, 2018, 10:30am. The talk will be followed by a discussion led by Prof. Ron Kenett and Dr. Avigdor Zonnenshain.

The talk (in English) is open to the public.

Abstract and information

Registration link

 


January 9, 2018

TES2018 Invited Address: Statistical Modeling in 3D: Describing, Explaining, and Predicting

I'll be delivering an invited address talk at the 11th International Conference of the Thailand Econometric Society (TES2018) in Chiang Mai, Thailand on Statistical Modeling in 3D: Describing, Explaining, Predicting. This talk expands on my previous work "To Explain or To Predict?" to also consider descriptive modeling.

When: Wednesday Jan 10, 10:30am

Where: Main Hall, Faculty of Economics, Chiang Mai University


January 4, 2018

Paper "Efficient estimation of COM–Poisson regression and GAM"

Our paper Efficient estimation of COM–Poisson regression and a generalized additive model is now available in Computational Statistics & Data Analysis (with Suneel Chatla). This link gives 50 free downloads before Feb 22, 2018. 

Abstract: The Conway–Maxwell–Poisson (CMP) or COM–Poisson regression is a popular model for count data due to its ability to capture both under dispersion and over dispersion. However, CMP regression is limited when dealing with complex nonlinear relationships. With today’s wide availability of count data, especially due to the growing collection of data on human and social behavior, there is need for count data models that can capture complex nonlinear relationships. One useful approach is additive models; but, there has been no additive model implementation for the CMP distribution. To fill this void, we first propose a flexible estimation framework for CMP regression based on iterative reweighed least squares (IRLS) and then extend this model to allow for additive components using a penalized splines approach. Because the CMP distribution belongs to the exponential family, convergence of IRLS is guaranteed under some regularity conditions. Further, it is also known that IRLS provides smaller standard errors compared to gradient-based methods. We illustrate the usefulness of this approach through extensive simulation studies and using real data from a bike sharing system in Washington, DC.

 


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