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Dr Keaton Ellis’s profound interest in behavioural economics and in comparing human behaviour to machines has brought him to Monash Business School in 2026, while his passion for the Rubik’s cube has given him an immediate local community.

Dr Keaton Ellis

Dr Keaton Ellis.

He said multiple factors drew him to MBUS, including its “excellent behavioural experimental group that let me hit the ground running.”

“I’m already discussing projects with several professors in the department,” Dr Ellis said.

Another reason he chose Monash was because his wife has also joined the school, as a statistician in the department of Econometrics and Business Analytics.  “We had spent seven years apart during our PhDs and post docs so to be able to both live and work here together is lovely”, Dr Ellis said.

Both his parents are professors of landscape architecture, and he spent his childhood moving across America, living in places as varied as Illinois, Texas, Michigan, and Maryland. As a kid he loved maths, and later stumbled across economics by chance at university.

“In college I took maths as a major and I didn’t start economics of any kind until my 2nd year of university,” Dr Ellis said.

“Only then did I pick it because I thought it would look better on my resume when I went looking for jobs.”

“I didn’t enjoy many classes until I took behavioural economics, which was the coolest class. It was all about doing maths with people in very interesting situations. It got me motivated outside of class, and I started reading a lot of pop economic books and having fun.”

From economics looking good on your CV to undertaking a PhD is a pretty big leap - how did that come about?

“Well, one day I went to see my professor to ask for some help. He said, ‘You ask good questions in class, have you considered a PhD?’ I told him that my plan was to look for a job in finance so I could go to New York , but a spark was lit inside me and I thought why not do a PhD? I applied to the University of Maryland, where I was at the time, and that professor became my supervisor”, says Dr Ellis.

Tell us more about your PhD and research agenda.

“My PhD and research agenda has broadly focused on bringing a new tool to the behavioural experimental tool kit,” Dr Ellis said.

“I apply machine learning tools to economic models to evaluate predictive power and identify previously overlooked behavioural patterns. This includes work on how data-driven methods compare with traditional economic models in predicting choice behaviour.”

“If economic models perform worse than machine learning models, it’s because there is some regularity in the data that the economic models miss but a machine learning model can capture. So, go figure out what that is and incorporate that into your economic model!”

What do you hope to explore more of in Melbourne, and in research moving forward?

“Life at Monash is lovely with a fantastic group of people. I feel productive and motivated during the week, and then on the weekends we often catch up with the young cohort within the department. Melbourne is a great city. I love Aussie Rules football and there are lots of things to do. But it is far away from family, and that is hard.”

“With regard to research, I’m very excited about a new project I’m working on with Dr Kate Huang which explores the human and AI collaboration space. We are interested to see how different types of communication of your preferences to an AI agent will have it make better or worse decisions on your behalf.”

“We ask how does communication affect the quality of the AI agent, how it handles conflicting pieces of information, and how it resolves the conflict. We have named our working paper Should I State or Should I Show?, and we have some results, but it is still early days.”

When he’s not working, Dr Ellis is something of a Rubik’s cube celebrity. He has been a competitive Rubik’s cube solver since high school, and briefly held the world record before it was again broken by someone else the same day. These days he mostly facilitates events and commentates, for example at the Rubik’s cube world championships in Seattle in 2025.

“Why is the Rubik’s cube still so popular? I think because there is a beautiful simplicity to it while it is still so hard to solve,” Dr Ellis said.

“Once you learn how to solve it there is something satisfying to see everything click into place. There is also a wonderful community of people doing this around the world.  You’re not rewarded necessarily for beating anyone else but for beating your own previous best time. People cheer for each other when they achieve their personal best, so people stick around because people are great.”

“During undergrad I went to Hungary as an exchange student, and I posted (that I was visiting) in a Rubik’s cube online community.”

“(Then) people picked me up from the airport, took me out and showed me around and drove me to competitions. Wherever you go there is always a friendly community. ”

Dr Mitchell Watt, who  has a background in mathematics and has worked in politics at Parliament House in Canberra, has joined the Department of Economics. Returning to Australia after stints at Harvard and Stanford, Dr Watt always knew he would eventually come back to his home country - and said Monash Business School presented the perfect opportunity sooner than he expected.

Dr Mitchell Watt

Dr Mitchell Watt.

Dr Watt’s time in politics, along with his childhood growing up in a household that relied at times on government assistance, influenced his decision to study economics and specialise in market design and public policy.

“I grew up in the outer suburbs of Brisbane and completed my undergrad in maths at the University of Queensland,” Dr Watt said.

“I had always been strong in maths at school, so I just fell into it at university. At the same time, I was involved in youth politics, and after graduating, I was lucky to land a job as an advisor and speechwriter for Jim Chalmers, who is now the Treasurer of Australia,” he said.

“He was new to Parliament at the time, and it was often just the two of us working together. It was a fun and fascinating job, but I knew I wanted to pursue postgraduate study.”

“I eventually applied to Harvard's Master in Public Policy program, and while there, I took several PhD classes in Economics. Several professors encouraged me to continue on to a PhD, which ultimately led me to Stanford University.”

Dr Watt is a microeconomic theorist whose research sits at the intersection of market design and public economics. His PhD dissertation examined how governments and other institutions can design price mechanisms to shape outcomes in large markets, especially when concerns about equity and efficiency interact.

“I use theoretical tools to address practical problems in market design and regulation,” Dr Watt said.

“My job market paper explores how governments can design in-kind transfers in settings where recipients can supplement their subsidised allocations in private markets. The main applications are to programs such as social housing and food assistance.”

This sounds like it might be influenced by your time in politics. Are politicians good at listening to the advice of academics?

“In my experience, good politicians engage a great deal with academics — especially those who can communicate their ideas in a way that is practically useful. That is genuinely valued. I think politicians are usually trying to make the best decisions they can to address difficult economic and social problems, but they operate under constraints that we academics don’t often model explicitly. Such as balancing competing interests and operating under constant media scrutiny.”

“I don’t think politics made me too cynical. If anything, it gave me a deeper appreciation for how complex policy-making is and what can be achieved within constraints. In politics, you have the ability to implement change and respond to urgent problems. But I also enjoy stepping back and analysing issues in more depth and over longer time horizons — and that’s what I get to do now,” he says.

And now you are back in Australia, what made you choose Monash?

“I knew I wanted to move back eventually, and as an academic you need to take advantage of any opportunity to come home. I’m very happy to be at Monash for several reasons. The colleagues are great. There are quite a few young faculty members, which creates lots of opportunities for interesting discussions as well as fun outside of work. The senior academics I’ve engaged with have also been very supportive and welcoming, and I am already involved in new projects. I’m also looking forward to teaching and meeting the students.”

“I will be teaching market design, and there aren’t that many courses on that in Australia. In Stanford, it’s one of the most popular economics classes, taught by my PhD adviser, Professor Paul Milgrom. His Nobel prize certainly helps attract students, but I hope I can bring some of that same enthusiasm to students at Monash interested in business and government, as well as those who are more research-inclined.”

You are originally from Queensland - will you be complaining about the weather in Melbourne?

“Well, the beaches here are beautiful, though I might complain a little about how cold the water is. Otherwise, I like Melbourne a lot. When I’m not working, you will find me exploring wineries, bars, and restaurants as well as going to the gym and the beach.”

What in your future with Monash excites you?

“I’m excited to finish some projects from my PhD, which always takes a little longer than anticipated. I’m also working on a new project with Professor Tim Moore on the design of Australia’s tax and transfer system, which is more applied than a lot of my previous projects, so that’s exciting, too. Otherwise, I will be celebrating my engagement party soon, and we’re planning to get a Golden Retriever later this year. It’s all exciting,” says Dr Mitch Watt.


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