Associate Professor of Marketing

Associate Professor of Economics (by courtesy)

CEPR Research Fellow

IFS Research Fellow

Imperial College Business School

South Kensington Campus                               

London SW7 2AZ

Faculty Profile Page

Email: Stephan.a.seiler@gmail.com

I use data to understand how consumers make choices

in settings ranging from laundry detergent discounts to 

choosing a hospital for a bypass operation. I am particularly

interested in how consumers gather information before making a

purchase and what we can learn from data on consumer search behavior.

I am an Associate Editor at Marketing Science, Quantitative Marketing and Economics,

and the Journal of  Industrial Economics. I co-organize the European Quant Marketing Seminar (eQMS).

Google Scholar profile

SSRN profile

LinkedIn profile  

Twitter: https://twitter.com/SeilerStephan

Recent Research Highlights:

Finalist for 🏆 Best Paper Award 🏆

Our work on soda taxes (joint work with Anna Tuchman and Song Yao) was a finalist for the Paul E. Green award for the best paper published in the Journal of Marketing Research in 2022.

State Dependence in Brand Choice

In a new paper with Julia Levine we analyze whether consumers that start purchasing new brands persist in their choices. We leverage stock-outs due to hurricanes that force to consumers to switch to a different brand because their preferred product is not available. Interestingly, we find that switches due to hurricane stock-outs do not exhibit any persistence and consumers switch back to their pre-hurricane purchases immediately. Therefore, we conclude that consumers do not exhibit structural state dependence in their brand choices. We rule out that our null result is driven by unusual purchases during a hurricane or context-specific purchase behavior when preparing for a hurricane.

Optimal Price Targeting 

In a new paper with Adam Smith and Ishant Aggarwal, we compare different approaches to estimating demand with consumer panel data with the goal of deriving personalized pricing policies. We provide a unified framework that lets us compare different modeling approaches with different data inputs in terms of the profits they generate when a targeted pricing policy is derived from each model.

 

We find that purchase histories are useful inputs in any model of demand, whereas demographics information has a small impact on the profitability of pricing policies. Model performance is variable with a Bayesian hierarchical model generating the largest profit gain followed by regularized regression and a neural network. We also find that measures of model fit are almost uncorrelated with predicted profits from a targeted pricing policy and hence statistical fit does not provide useful guidance to model selection.

More detail are in this twitter thread about the paper.

Find out more about my recent research projects on my Blog.

... or follow me on Twitter ... 

Professor Stephan Seiler