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- W4294406048 abstract "Abstract Change point detection has many practical applications, from anomaly detection in data to scene changes in robotics; however, finding changes in high dimensional data is an ongoing challenge. We describe a self-training model-agnostic framework to detect changes in arbitrarily complex data. The method consists of two steps. First, it labels data as before or after a candidate change point and trains a classifier to predict these labels. The accuracy of this classifier varies for different candidate change points. By modeling the accuracy change we can infer the true change point and fraction of data affected by the change (a proxy for detection confidence). We demonstrate how our framework can achieve low bias over a wide range of conditions and detect changes in high dimensional, noisy data more accurately than alternative methods. We use the framework to identify changes in real-world data and measure their effects using regression discontinuity designs, thereby uncovering potential natural experiments, such as the effect of pandemic lockdowns on air pollution and the effect of policy changes on performance and persistence in a learning platform. Our method opens new avenues for data-driven discovery due to its flexibility, accuracy and robustness in identifying changes in data." @default.
- W4294406048 created "2022-09-03" @default.
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- W4294406048 date "2022-09-03" @default.
- W4294406048 modified "2023-10-18" @default.
- W4294406048 title "Leveraging change point detection to discover natural experiments in data" @default.
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- W4294406048 doi "https://doi.org/10.1140/epjds/s13688-022-00361-7" @default.
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