Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collecting Charges for Ad Impact on User Experience for Different Price
  Types   This note describes how to collect charges for ad impact on user experience.
The charge may be per-view, to account for impact on user experience from
viewing an ad, or per-click, to account for impact from clicking on the ad. The
results for per-click charges also apply to per-conversion charges or
per-action charges. Conceivably, a marketplace could assess both kinds of
charges.

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The categories of this paper are: cond-mat
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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: astro-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph