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.


October 25, 2017

Talk at UT Dallas on "Researcher Dilemmas Using Behavioral Big Data"

I'll be talking about "Researcher Dilemmans Using Behavioral Big Data" at the The University of Texas at Dallas Naveen Jindal School of Management's Information Systems seminar today.
Time: 10:30-12:00
Location: JSOM Room 13.501

October 19, 2017

"A Tree-based Approach for Addressing Self-Selection in Impact Studies with Big Data" at INFORMS Data Science Workshop

On Saturday morning, I'll present a talk on "A Tree-based Approach for Addressing Self-Selection in Impact Studies with Big Data" at the 1st INFORMS Workshop on Data Science in Houston, TX. I'll describe our proposed tree-based approach as an alternative to propensity scores, which has several advantages over PSM. This is joint work with Inbal Yahav and Deepa Mani, published in MISQ in 2016.

When: Saturday, Oct 21, Session 1A (9:00 – 10:30)
Where: Hilton Americas-Houston, Level 3, Room 344