About Us

Stan Humphries, Chief Economist
Stan Humphries is in charge of data and analytics. He helped create the Zestimate and its algorithm and is also in charge of calculating all statistics on the housing market, including the Zillow Home Value Index. Prior to joining Zillow, Stan spent five years at Expedia.com where he ran a team responsible for finding innovative ways to use data, building systems for personalization, pricing, forecasting, and fraud detection. Before Expedia, Stan served as a researcher and faculty member at the University...


Svenja Maarit Gudell, Senior Economist
Svenja joined Zillow in 2011 and is currently working on negative equity valuations and forecasting. She also works on foreclosure research and is involved in research collaborations with other organizations and academics. Prior to joining Zillow, Svenja completed her Ph.D. in Finance from the University of Rochester. Before starting her Ph.D. program, Svenja worked for Analysis Group in Boston, where she was part of various teams working on economic, financial and strategy consulting projects....


Andrew Bruce, Senior Director of Quantitative Modeling
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  ...


Dong Xiang, Senior Quantitative Modeler
Dong came to Zillow in 2005 as a senior quantitative modeler, where he helped develop the Zestimate algorithm. He also works on Zillow's Real Estate Market Reports, and helps calculate our negative equity figures. Before he came to Zillow, Dong worked at Expedia.com, where he developed models for a real-time fraud detection system for air and hotel purchases. He has also worked at SAS Institute. Dong received his Ph.D. and his Master Degree in statistics from the University of Wisconsin, Madison,...


Yeng Bun, Senior Quantitative Modeler
Yeng joined Zillow in 2006 and plays a major role in the production and quality of our Real Estate Market Reports. He also developed and implemented parts of the AVM that produces Zestimates. Prior to joining Zillow, spent four years at Samurai EC and Lehman Brothers, where he developed parts of real-time systems for market makers to quote and trade stock options and FOREX with various exchanges. He has also worked at Insightful Corp. as a developer of statistical software and at QUEST Integrated,...


Bill Constantine, Senior Quantitative Modeler
Bill began working at Zillow as a senior quantitative modeler in 2012. He is in charge of streamlining the development process for our analytics and steadily working to improve them. Prior to joining Zillow, Bill spent four years at Revolution Analytics as a senior developer of advanced analytics and ten years at Insightful Corporation as a (principal) investigator for several research contracts with various government agencies including the NIH, DoD, NASA, and NSF. Bill also worked at NASA  Ames...


Steve Brownell, Data and Analytics Specialist
Steve joined Zillow in early 2009 as a Data Analyst. His work touches many parts of the company including business intelligence, ad performance, pricing, and combing the real estate market for interesting data trends. Before working at Zillow he was an Associate Scientist at Passport Systems in Massachusetts where he helped develop Photon Accelerator-based Non-Intrusive Nuclear Cargo Inspection Systems for port security funded by the Department of Homeland Security. Steve has a Bachelor of Science...


Katie Curnutte, Director of Communications
Katie joined Zillow in 2008 and leads the company's data PR efforts. She manages the communications surrounding the Real Estate Market Reports and frequently works with economists from government institutions and academia who use Zillow data in their research. Before joining Zillow, she ran public relations for The Warren Group, a Boston-based company that collects public record real estate data. She has also worked as a real estate journalist. Katie has a Bachelor of Science in journalism from...


Zillow Technical Advisory Board, Economics
  Thomas G. Thibodeau, Ph.D. Tom Thibodeau is the Global Real Estate Capital Markets Professor and the Academic...