January 2016
Beginner
256 pages
9h 5m
English
Content preview from Handbook of Media Economics, vol 1B
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As an illustration, we can compute the minimal-bandwidth index of some outlets
in
Table 16.1. All we need to know is the attention share of each outlet. For instance,
Media 1 has 50% of the attention in Segment a, 25% of the attention in Segment b, and no
attention share in the other two segments. The total attention share is therefore 18.75%.
This yields a power index of
σ 1ðÞ¼min 1,
0:1875
1 0:1875
¼0:231:
The value
σ 1ðÞ¼0:231 can be interpreted as the maximal damage that Media 1 can inflict
on the electorate if bandwidth is minimal in all segments.
Table 16.2 reports the minimal-
bandwidth value of the index for all five media outlets. One could
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