Symposium on Principles of Database Systems (PODS) 2024
Résumé
Bibtex
@article{10.1145/3651606,
author = {Bienvenu, Meghyn and Figueira, Diego and Lafourcade, Pierre},
title = {When is Shapley Value Computation a Matter of Counting?},
year = {2024},
issue_date = {May 2024},
publisher = {Association for Computing Machinery},
address = {New York, NY, USA},
volume = {2},
number = {2},
url = {https://doi.org/10.1145/3651606},
doi = {10.1145/3651606},
abstract = {The Shapley value provides a natural means of quantifying the contributions of facts to database query answers. In this work, we seek to broaden our understanding of Shapley value computation (SVC) in the database setting by revealing how it relates to Fixed-size Generalized Model Counting (FGMC), which is the problem of computing the number of sub-databases of a given size and containing a given set of assumed facts that satisfy a fixed query. Our focus will be on explaining the difficulty of SVC via FGMC, and to this end, we identify general conditions on queries which enable reductions from FGMC to SVC. As a byproduct, we not only obtain alternative explanations for most existing results on SVC, but also new complexity results. In particular, we establish FP-#P complexity dichotomies for constant-free connected UCQs and homomorphism-closed connected graph queries. We further explore variants of SVC, either in the absence of assumed facts, or where we measure the contribution of constants rather than facts.},
journal = {Proc. ACM Manag. Data},
month = {may},
articleno = {105},
numpages = {24},
keywords = {Shapley value, conjunctive queries, homomorphism-closed queries, model counting, probabilistic databases, query answering}
}