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Networks sell advertising time based principally on...

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Networks sell advertising time based principally on their performance among key demographic groups, which vary based on the time of day. Ratings performance in these categories gives a rough indication of network revenues in that day part, though profitability can vary based on programming costs and other factors.

Prime Time

Ratings for adults, 18-49

NBC

Last week: 7.3

Season to date: 6.9

Fox

Last week: 5.7

Season to date: 5.4

ABC

Last week: 5.4

Season to date: 5.9

CBS

Last week: 4.4

Season to date: 4.4

UPN

Last week: 2.5

Season to date: 2.2

WB

Last week: 1.5

Season to date: 1.4

Size of group: 123,150,000

Note: Each rating point equals 1% of group

Sources: A.C. Nielsen Co, networks

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