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- W4378501097 abstract "Simulation-based inference (SBI) methods such as approximate Bayesian computation (ABC), synthetic likelihood, and neural posterior estimation (NPE) rely on simulating statistics to infer parameters of intractable likelihood models. However, such methods are known to yield untrustworthy and misleading inference outcomes under model misspecification, thus hindering their widespread applicability. In this work, we propose the first general approach to handle model misspecification that works across different classes of SBI methods. Leveraging the fact that the choice of statistics determines the degree of misspecification in SBI, we introduce a regularized loss function that penalises those statistics that increase the mismatch between the data and the model. Taking NPE and ABC as use cases, we demonstrate the superior performance of our method on high-dimensional time-series models that are artificially misspecified. We also apply our method to real data from the field of radio propagation where the model is known to be misspecified. We show empirically that the method yields robust inference in misspecified scenarios, whilst still being accurate when the model is well-specified." @default.
- W4378501097 created "2023-05-27" @default.
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- W4378501097 date "2023-05-25" @default.
- W4378501097 modified "2023-10-09" @default.
- W4378501097 title "Learning Robust Statistics for Simulation-based Inference under Model Misspecification" @default.
- W4378501097 doi "https://doi.org/10.48550/arxiv.2305.15871" @default.
- W4378501097 hasPublicationYear "2023" @default.
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