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  • Feb
    6

    IEMS Seminar - Zeyu Zheng

    Department of Industrial Engineering and Management Sciences (IEMS)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    Title: Non-stationary A/B Tests

    Abstract: A/B tests, also known as online randomized controlled experiments, have been used at scale by data-driven enterprises to guide decisions and test innovative ideas. Non-stationarities, such as the time-of-day effect, the day-of-week effect, and longer-term trends, can often arise nonparametrically in core business metrics. We discuss in this presentation the impact of non-stationarities on A/B tests. We argue that inadequately addressing non-stationarities can lead to wrong decisions and missed opportunities. We discuss some scenarios where the challenges brought by non-stationarities may be appropriately addressed.

    Bio: Zeyu Zheng is an assistant professor at UC Berkeley, Department of Industrial Engineering and Operations Research since 2018. He received a PhD in Management Science and Engineering (2018), PhD minor in Statistics (2018), and MS in Economics (2016) from Stanford University, and BS in Mathematics (2012) from Peking University. He serves as an Associate Editor for Operations Research, Probability in the Engineering and Informational Sciences. His research group currently works on simulation, experiment design and inference, generative AI, stochastic optimization and non-stationary modeling.

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    TIME Tuesday, February 6, 2024 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Kendall Minta    kendall.minta@gmail.com EMAIL

    CALENDAR Department of Industrial Engineering and Management Sciences (IEMS)

  • Dec
    2

    IEMS Seminar 12.2 Itai Gurvich Fall 2025

    Department of Industrial Engineering and Management Sciences (IEMS)

    11:00 AM L440, Technological Institute

    EVENT DETAILSmore info

    TIME Tuesday, December 2, 2025 at 11:00 AM - 12:00 PM

    LOCATION L440, Technological Institute    map it

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    CONTACT Kendall Minta    kendall.minta@gmail.com EMAIL

    CALENDAR Department of Industrial Engineering and Management Sciences (IEMS)

  • Dec
    11

    MLDS Online Information Session

    Master of Science in Machine Learning and Data Science (MLDS)

    10:00 AM

    EVENT DETAILSmore info

    TIME Thursday, December 11, 2025 at 10:00 AM - 11:00 AM

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    CONTACT Master of Science in Machine Learning and Data Science Program    mlds@northwestern.edu EMAIL

    CALENDAR Master of Science in Machine Learning and Data Science (MLDS)

  • Dec
    13

    Northwestern Engineering PhD Hooding and Master's Recognition Ceremony

    McCormick School of Engineering and Applied Science

    4:00 PM Pick-Staiger Concert Hall

    EVENT DETAILS

    TIME Saturday, December 13, 2025 at 4:00 PM - 6:00 PM

    LOCATION Pick-Staiger Concert Hall    map it

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    CONTACT Andi Joppie    andi.joppie@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science