Search Results for author: Alexander Buchholz

Found 7 papers, 0 papers with code

Unbiased Offline Evaluation for Learning to Rank with Business Rules

no code implementations3 Nov 2023 Matej Jakimov, Alexander Buchholz, Yannik Stein, Thorsten Joachims

For industrial learning-to-rank (LTR) systems, it is common that the output of a ranking model is modified, either as a results of post-processing logic that enforces business requirements, or as a result of unforeseen design flaws or bugs present in real-world production systems.

Learning-To-Rank Off-policy evaluation

Fair Effect Attribution in Parallel Online Experiments

no code implementations15 Oct 2022 Alexander Buchholz, Vito Bellini, Giuseppe Di Benedetto, Yannik Stein, Matteo Ruffini, Fabian Moerchen

We suggest an approach to measure and disentangle the effect of simultaneous experiments by providing a cost sharing approach based on Shapley values.

Attribute Causal Inference +1

Ranker-agnostic Contextual Position Bias Estimation

no code implementations28 Jul 2021 Oriol Barbany Mayor, Vito Bellini, Alexander Buchholz, Giuseppe Di Benedetto, Diego Marco Granziol, Matteo Ruffini, Yannik Stein

This paper introduces a method for modeling the probability of an item being seen in different contexts, e. g., for different users, with a single estimator.

Learning-To-Rank Position

Distributed Computation for Marginal Likelihood based Model Choice

no code implementations10 Oct 2019 Alexander Buchholz, Daniel Ahfock, Sylvia Richardson

We propose a general method for distributed Bayesian model choice, using the marginal likelihood, where a data set is split in non-overlapping subsets.

Quasi-Monte Carlo Variational Inference

no code implementations ICML 2018 Alexander Buchholz, Florian Wenzel, Stephan Mandt

We also propose a new algorithm for Monte Carlo objectives, where we operate with a constant learning rate and increase the number of QMC samples per iteration.

Variational Inference

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