Andrew is in charge of the quantitative modeling group, which is responsible for products such as the Zestimate, Rent Zestimate, and ZHVI price index and forecasts. Prior to joining Zillow in 2012, Andrew was a partner in Samurai Trading since 2004. Samurai is a broker-dealer that focuses on electronic market-making, and has operaterd in a variety exchanges, including BATS, CBOE, ISE and BOX. He was also at Lehman Brothers in the Global Electronic Trading department, working on a several strategic initiatives including a new platform for FOREX trading. Andrew worked at Insightful Corp (a vendor of statistical software and now part of the Spotfire division of TIBCO) in a range of corporate roles with an emphasis on the finance sector. He has had research fellowships from the Dept of Census and Statistics New Zealand, and was a Lecturer at University of Victoria in Wellington, NZ). He received a Ph.D. in statistics from University of Washington and an A.B. in statistics from Princeton University.