PhD in Quantitative Marketing in the Domain of Algorithmic Fairness

The Marketing group at Rotterdam School of Management, Erasmus University seeks a highly motivated PhD student with strong quantitative skills to study the problem of algorithmic biases in marketing.

As machines are trained to analyse complex problems, many tasks that previously required humans are now guided by Artificial Intelligence. Marketing is no exception in this domain. Increasingly, companies use algorithms to design targeted marketing campaigns. Causal Machine Learning is an emerging research field that can learn the causal effect of an intervention and how it varies within a population based on a large set of potential moderating variables. Its use in marketing has been rapidly growing over the last years (Lemmens and Gupta 2020; Esterzon, Lemmens, Van den Bergh 2023).

Unfortunately, algorithms can be discriminatory. The number of cases reporting biases in algorithms has exploded. Algorithms reproduce and amplify biases present in human decisions. They may even inadvertently create new discriminatory outcomes.

This PhD project ambitions to tackle this crucial managerial and societal challenge. The goal will be to better understand the problem of algorithmic biases in the context of targeting marketing campaigns and to develop a novel methodological framework to design effective and fair personalized policies. The project will include large-scale field experiments in collaboration with company partners.

Strong applicants typically have backgrounds in computer science, statistics or econometrics but should have an intrinsic interest for marketing problems. The PhD will be supervised by Prof. Dr. Aurélie Lemmens and funded by a VICI NWO grant.

Algorithmic bias, Causal Inference, Discrimination, Fairness, Machine Learning, Targeted Marketing Campaigns.

The marketing group at Rotterdam School of Management (RSM) ranks among the best in the world. Our members publish their research in top journals in marketing as well as related fields. They deeply care about open science practices (e.g., data sharing, open-source software), and host regular seminars and visits to encourage knowledge exchange with other top schools in the world. The group is diverse (in terms of research interests and cultural background), collaborative, and collegial.

Our PhD program seeks to train the next generation of marketing academics. We want our students to maximize their potential and become independent marketing scholars. We expect students to become experts in a specific domain of choice.

This vacancy is explicitly targeted at candidates interested in algorithmic biases and developing methodological approaches to tackle this challenge. The project will have a strong quantitative component relying on computer science, machine learning, policy evaluation and causal inference. In addition, it will also contain a strong business component, in particular, as the project will be done in collaboration with several industry partners with whom field experiments will be carried. Finally, there is a possibility for the project to also include a more behavioral component as it would be interesting to study how consumers perceive algorithmic discrimination of different kinds and how companies can mitigate negative perceptions.

During their PhD, the candidate will also benefit from the large set of expertise of the other members of the marketing department (such as Jason Roos, Sebastian Gabel, Alina Ferecatu, Gui Liberali, Ana Martinovici, Dan Schley, Antonia Krefeld-Schwalb, Anne Klesse, Bram Van den Bergh) in the domain of reinforcement learning, deep learning, causal inference, field experiments, consumer behavior, human-AI interactions, behaviorial economics and sustainability.

In addition to standard required course work, students typically take courses in machine learning, (micro)economics, statistics, causal inference, econometrics, and seminars in quantitative marketing. The exact portfolio of courses is chosen in consultation with the advisers.

The project will leverage field experiment data and combine it with extensive simulation studies. As currently defined, it will rely on three main methodological domains: (1) active learning, (2) causal machine learning and (3) policy evaluation. It is an inter-disciplinary project that will combine the state of the art in economics (causal inference), experimentation, computer science, marketing and management.

The PhD student will work in close collaboration with the main advisor, and other faculty on tasks that include:

• Identifying novel research questions in the domain of algorithmic fairness.  
• Understanding the theoretical foundations and state-of-the-art models in marketing science, economics, psychology, and computer science literatures relevant to understanding the phenomena.
• Identifying the fundamental variables, trade-offs and relationships that are most important to studying the phenomena.
• Developing and coding the appropriate algorithms and methods that implement the novel concepts and models.
• Gathering experimental or observational data to highlight the strength and boundaries of the proposed methods.
• Identifying the critical assumptions needed to draw inferences from empirical results.
• Writing computer code to analyse experimental or secondary data according the best practices and tools including versioning (e.g., GitHub), pre-registration, data sharing and open science (e.g., Figshare).
• Presenting research findings at international conferences, in our PhD day and brownbag seminars.
• Writing up findings for publication in international journals.
• Attending classes and seminars (including those offered at other universities) to further develop thinking and research skills.
• Participating in and contributing to departmental research functions (PhD Day, research seminars, weekly research meetings).
• Teaching students (to a limited degree).

Through workshops, research seminars, applied and theoretical research with faculty, and seminars on key disciplines that provide the foundations of the marketing discipline (statistics, economics, psychology), the PhD student will gain the requisite experience for independent work.

Students have access to world-class research facilities:

• High-performance computing is available to researchers via SURFSara (a Dutch consortium for scientific computing)
• Erasmus Behavioral Lab
• Excellent research funding

We seek candidates with the following qualities:

• Intellectual curiosity, drive, eagerness to learn, and openness to criticism and other perspectives
• Strong motivation to pursue an international career as a leading scholar
• Strong commitment to methodological rigor and scientific integrity
• Strong passion for real-world problems faced by different types of organizations
• Excellent speaking and writing ability in fluent English, ideally with experience writing for a scientific audience
• Willingness and motivation to independently formulate research projects and carry them through to completion
• Excellent organizational skills
• Masters’ degree (preferably a Research Master´s or MPhil degree) in one of the following fields: computer science, data science, operations research, economics, econometrics, quantitative psychology, statistics, management, or marketing. 
• The ideal candidate should also have some experience in programming (e.g., R, Python, Julia, Scala, Java, or C++) and in data analysis, management, preparation, and visualization, ideally as part of at least one end-to-end data science project.

Interdisciplinary focus:

One feature that sets RSM apart from other faculties is the extent of cross-discipline work between the quantitative faculty (trained primarily in machine learning, operations research and economics) and the behavioral faculty (e.g., trained primarily in psychology and neuroscience). Thus, we are also particularly interested into candidates that are not only interesting in the methodological aspect of the project but also in potential ramifications with consumer psychology and behavior.

Required by ERIM

All application documents required by ERIM can be found here: https://www.erim.eur.nl/doctoral-programme/phd-in-management/admissions/application/

The project is expected to lead to top publications in the domain of marketing and computer science. In addition, an open-access web-platform will be created to share all data, codes and tutorials with the public and maximize the societal impact of this project. The final results of the PhD project are published in a PhD dissertation.

This project will involve collaborations with external data partners who will carry field experiments. In addition, it will benefit from connections to strong connections with other departments and schools within Erasmus University (Erasmus School of Law, Department of Business Society Management at RSM). To strengthen your international research network and complement your time at RSM, you will receive funding for a 3- to 6-month research visit. Past and on-going visits have included Stanford, MIT, Wharton, Chicago, Columbia, Harvard, Colorado, Cornell, and UCLA.

PhD students are encouraged to pursue topics that not only improve the practice of marketing, but also consumer or societal well-being (e.g., algorithmic fairness), and thus align closely with the school’s mission to be a force for positive change in the world.

PhD research should be of the highest quality, carried out with scientific rigor and the utmost integrity. The department values openness and encourages students to embrace the principles and tools of open science (e.g., making code and data available to others and pre-registering experiments). The marketing group conducts research in our core field of marketing, as well as related disciplines outside marketing. Our diversity and interdisciplinarity make the department a lively, creative, and intellectually stimulating place to conduct research.

Ascarza, E., & Israeli, A. (2022). Eliminating unintended bias in personalized policies using bias-eliminating adapted trees (BEAT). Proceedings of the National Academy of Sciences, 119(11), 1-9.

Athey, S. (2017). Beyond prediction: Using big data for policy problems. Science, 355(6324), 483–485.

Barocas, S., Hardt, M., & Narayanan, A. (2021). Fairness in Machine Learning. Retrieved from https://fairmlbook.org

Chernozhukov, V., Chetverikov, D., Demirer, M., Duflo, E., Hansen, C., & Newey, W. (2017). Double/debiased/Neyman machine learning of treatment effects. American Economic Review, 107(5), 261-265.

Esterzon, E., Lemmens, A., & Van den Bergh, B. (2023). Enhancing Donor Agency to Improve Charitable Giving: Strategies and Heterogeneity. Journal of Marketing, 87(4), 636–655. Retrieved from https://doi.org/10.17605/OSF.IO/4NZSW

Kallus, N., & Zhou, A. (2018). Residual unfairness in fair machine learning from prejudiced data. International Conference on Machine Learning, 2439–2448.

Lambrecht, A., & Tucker, C. (2019). Algorithmic bias? An empirical study of apparent gender-based discrimination in the display of STEM career ads. Management Science, 65(7), 2966–2981.

Lemmens, A., & Croux, C. (2006). Bagging and boosting classification trees to predict churn. Journal of Marketing Research, 43(2), 276–286.

Lemmens, A., & Gupta, S. (2020). Managing churn to maximize profits. Marketing Science, 39(5), 956–973.

Lemmens, A., Van den Bergh, B., & Esterzon, E. (2023, July 7). Enhancing Donor Agency to Improve Charitable Giving. OSF repository. Retrieved from https://doi.org/10.17605/OSF.IO/4NZSW

Puha, Z., Kaptein, M., & Lemmens, A. (2020). Batch mode active learning for individual treatment effect estimation. IEEE International Conference on Data Mining Workshops.

Wager, S., & Athey, S. (2018). Estimation and inference of heterogeneous treatment effects using random forests. Journal of the American Statistical Association, 113(523), 1228–1242

Websites:

You can find information about the research of the main supervisor on https://www.aurelielemmens.com/. Please refer to the web page (https://www.rsm.nl/research/departments/marketing-management/faculty/) for more information about the department of marketing management. You may also refer to our RSM Discovery section (see here https://discovery.rsm.nl/researchers/). It offers a collection of articles and videos that our faculty (and those from other departments) have created about their research. Finally, you can also find useful references to existing projects and current collaborations with companies in this domain on the expert practice page of the Erasmus Center for Data Analytics directed by Prof. Dr. Lemmens https://ecda.eur.nl/expert-practices/customer-analytics/

ERIM offers fully-funded and salaried PhD positions, which means that accepted PhD candidates become employees (promovendi) of Erasmus University Rotterdam. Salary and benefits are in accordance with the Collective Labour Agreement for Dutch Universities (CAO).

Erasmus University Rotterdam aspires to be an equitable and inclusive community. We nurture an open culture, where everyone is supported to fulfil their full potential. We see inclusivity of talent as the basis of our successes, and the diversity of perspectives and people as a highly valued outcome. EUR provides equal opportunities to all employees and applicants regardless of gender identity or expression, sexual orientation, religion, ethnicity, age, neurodiversity, functional impairment, citizenship, or any other aspect which makes them unique. We look forward to welcoming you to our community.

For questions regarding the PhD application and selection procedure, please check the Admissions or send us an e-mail via phdadmissions@erim.eur.nl.