Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Probabilistic Approach for Maintaining Trust Based on Evidence   Leading agent-based trust models address two important needs. First, they
show how an agent may estimate the trustworthiness of another agent based on
prior interactions. Second, they show how agents may share their knowledge in
order to cooperatively assess the trustworthiness of others. However, in
real-life settings, information relevant to trust is usually obtained
piecemeal, not all at once. Unfortunately, the problem of maintaining trust has
drawn little attention. Existing approaches handle trust updates in a
heuristic, not a principled, manner. This paper builds on a formal model that
considers probability and certainty as two dimensions of trust. It proposes a
mechanism using which an agent can update the amount of trust it places in
other agents on an ongoing basis. This paper shows via simulation that the
proposed approach (a) provides accurate estimates of the trustworthiness of
agents that change behavior frequently; and (b) captures the dynamic behavior
of the agents. This paper includes an evaluation based on a real dataset drawn
from Amazon Marketplace, a leading e-commerce site.

5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph