A History of Marketing / Episode 46

David Reibstein has spent his career straddling disciplines that don’t always talk to each other: quantitative analysis and behavioral science, academic theory and management practice, marketing departments and finance teams.

As a Professor of Marketing at the Wharton School of the UPenn and the co-author of Marketing Metrics, Reibstein is a world-renowned expert on how to measure what marketing actually contributes to a business.

We discuss what David learned while under the mentorship of Frank Bass, a pioneer of bringing quantitative analysis to marketing and half the namesake of the Ehrenberg-Bass Institute. Then we trace David’s early analysis on brand switching through his current research on nation branding and cryptocurrency confidence.

Along the way, we dig into why brand equity rarely shows up on balance sheets, why CMOs still struggle to justify Super Bowl ad spend, and what the Finance Minister of Saudi Arabia wanted to discuss over a private lunch.

Listen to the podcast: Spotify / Apple Podcasts

A few highlights from our discussion:

* How Frank Bass transformed marketing from “think like a customer” intuition into a data-driven discipline

* Why brand equity should account for both price premiums and volume gains

* The surprising reach of nation branding research (and the heckler who said his data were wrong)

* What crypto and meme coins reveal about confidence as currency

Special Thanks:

Thank you to Xiaoying Feng, a Marketing Ph.D. Candidate at Syracuse, for reviewing and editing transcripts for accuracy and clarity.

And thank you to Bill Moult, whom you may remember from episode 23 of this podcast, for introducing me to Professor Reibstein.

The Influence of Frank Bass on Marketing Science

Andrew Mitrak: I thought I would start at the beginning of your career. One of the names that I saw you collaborated with and worked for was Frank Bass. I’ve interviewed a professor from the Ehrenberg-Bass Institute, and we’ve talked a lot about their work on the podcast. We haven’t actually talked about Frank Bass himself, so I thought I might just start there and ask you about Frank Bass and what you learned from working with him.

David Reibstein: It’s a great place to start because that really is where my academic career began. He was known as basically one of the key people that was bringing quantitative aspects into the field of marketing. He was bringing meat into the whole category. He contacted me while I was in a master’s program. Frank started talking to me about, “You don’t need to finish that master’s program. Why don’t you come join the PhD program now?” I was three-quarters of the way through my master’s program, and I went and joined the PhD program, thinking if I go into academia, I don’t need that master’s. And I’ve never needed that master’s.

Andrew Mitrak: So Bass was a pioneer in bringing this quantitative side of marketing to the field. Could you just describe the field before him? What was the status of quantitative analytics and taking more of a data-driven approach and measuring the impact of marketing at the time? Can you give us a picture of the before and after?

David Reibstein: So if you think about what was marketing practice, it was “think like a customer.” There were a lot of consumer behavior aspects that were to it. Actually, when I was in my PhD program, I worked a lot with Jacob Jacoby, thinking about that. I had a minor in consumer behavior, but that was sort of where marketing had been. It’s now a major sector of the field of marketing.

The Evolution of Data and Econometrics

David Reibstein: But the quantitative side, if you think about the availability of data, it was 100% survey data with quarterly, at best, Nielsen data. We didn’t have a richness of data. Bass was looking at some time series data, how sales changed quarter to quarter. That’s sort of the field as it was at that time. He spent a lot of time, and some of the classes that we took with him—I say we, my fellow doctoral students—was thinking about econometrics as it applied to marketing. How sales changed over time with changes in marketing expenditures. That’s sort of where it is. If you think about where we are in 2026, the nature of data has exploded. You don’t need me in this session to talk about big data, but the abundance of data and moving away to a very large degree, but not entirely, from survey data has certainly been a prevalent part of how the field has evolved.

Andrew Mitrak: Once you left your master’s where you were three-quarters of the way through and got started working on your PhD program under the guidance of Frank Bass, what did you learn from him? What did you collaborate with him on?

David Reibstein: We spent a lot of time looking at brand switching behavior. It’s sort of related to brand loyalty issues versus just random behavior that happened to be there. He talked a lot about the stochastic man, that it’s all a stochastic process. There’s a probability of you buying certain brands, but what you bought last period doesn’t have an impact exactly on this period. There are different theories about how people switch, but a lot of what it is that I was working on with him at that time was looking at that switching behavior from consumers. That obviously would relate to frequently purchased goods (fast-moving consumer goods).

Current models and thinking about customer lifetime value and how long you think they’re going to stay with you over what period of time—some of that early work really feeds into trying to think about customers and how long you’re going to have them as customers over time. We were trying to change the probability of choice. It moved from being deterministic, “Here’s what they’re going to choose,” to “Here’s the probability that they’re going to pick these particular items.” Predicting probability of choice, we’re much better at doing that than predicting specific choice.

Andrew Mitrak: So this area became a thread throughout your career, tying marketing activity to measurable business impact. This is something that you worked on for decades afterwards, and it started back under your work under Frank Bass. Why did you see that this was the area to focus on for so long? Did you feel like there was a gap in this area where you could be the person to carve out your career here? What did you identify there?

David Reibstein: I’m going to go back to your previous question and tie it to this question. A lot of what I learned from Dr. Bass, from Frank Bass, is really methodologies. Econometrics was a major part of that, but certainly how to deal with data, structural equations, and trying to think about all of that. But it turns out that rather than just be a methodologist, what I thought was important was to spend some time trying to think about actions that management takes and then relating that to particular outcomes using the appropriate methodologies.

Bridging Methodology and Management

David Reibstein: So when I left Purdue, I joined

David Reibstein: Linking Marketing Metrics to Financial Consequences