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 Statistical Learning




Model-enhanced Vector Index

Neural Information Processing Systems

The document retrieval stage retrieves candidate documents related to the query, while the ranking stage re-ranks the documents using precise ranking scores.


A benchmark of categorical encoders for binary classification

Neural Information Processing Systems

Categorical encoders transform categorical features into numerical representations that are indispensable for a wide range of machine learning models. Existing encoder benchmark studies lack generalizability because of their limited choice of 1. encoders, 2. experimental factors, and 3. datasets. Additionally, inconsistencies arise from the adoption of varying aggregation strategies. This paper is the most comprehensive benchmark of categorical encoders to date, including an extensive evaluation of 32 configurations of encoders from diverse families, with 48 combinations of experimental factors, and on 50 datasets. The study shows the profound influence of dataset selection, experimental factors, and aggregation strategies on the benchmark's conclusions -- aspects disregarded in previous encoder benchmarks.