Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Principled Approach to Data Valuation for Federated Learning   Federated learning (FL) is a popular technique to train machine learning (ML)
models on decentralized data sources. In order to sustain long-term
participation of data owners, it is important to fairly appraise each data
source and compensate data owners for their contribution to the training
process. The Shapley value (SV) defines a unique payoff scheme that satisfies
many desiderata for a data value notion. It has been increasingly used for
valuing training data in centralized learning. However, computing the SV
requires exhaustively evaluating the model performance on every subset of data
sources, which incurs prohibitive communication cost in the federated setting.
Besides, the canonical SV ignores the order of data sources during training,
which conflicts with the sequential nature of FL. This paper proposes a variant
of the SV amenable to FL, which we call the federated Shapley value. The
federated SV preserves the desirable properties of the canonical SV while it
can be calculated without incurring extra communication cost and is also able
to capture the effect of participation order on data value. We conduct a
thorough empirical study of the federated SV on a range of tasks, including
noisy label detection, adversarial participant detection, and data
summarization on different benchmark datasets, and demonstrate that it can
reflect the real utility of data sources for FL and has the potential to
enhance system robustness, security, and efficiency. We also report and analyze
"failure cases" and hope to stimulate future research.

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The categories of this paper are: solv-int
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an