Portrait of Justin Rao

Justin Rao



Justin M. Rao is a an Economic Researcher at Microsoft Research in the New York City research lab. He is an empirical microeconomist who came to Microsoft following a two year stint with Yahoo! Research in Silicon Valley. He completed his Ph.D. in economics in 2010 at UC San Diego under the capable guidance of Jim Andreoni.


Multiworld Testing

Established: November 1, 2013

Exponentially better than A/B testing. Multiworld Testing (MWT) is the capability to test and optimize over K policies (context-based decision rules) using an amount of data and computation that scales logarithmically in K, without…

Explore-Exploit Learning @MSR-NYC

Established: October 24, 2013

This is an umbrella project for machine learning with explore-exploit tradeoff: the trade-off between acquiring and using information. This is a mature, yet very active, research area studied in Machine Learning, Theoretical Computer Science, Operations Research, and Economics. Much of…




MSR NYC Lab Opening Link description

MSR NYC Lab Opening


May 16, 2014


Duncan Watts, Fernando Diaz, Kate Crawford, David Rothschild, Justin Rao, Jennifer Chayes, Dan Huttenlocher, Kathy McKeown, danah boyd, and David Pennock


Microsoft Research New York City, Microsoft Research New England and New York City, Cornell Tech, Columbia University