The First-Run Syndication Market Does Not Include Shows That Did

Audience share is always higher than the program rating unless all the households have their sets turned on. Audience share is the percentage of households using TV in a specified time period that are tuned to a specific program.Audience share is always higher than the program rating unless all the households have their sets turned on (in which case they would be equal).

Designated market areas (DMAs), in practice, are usually overlapping. DMAs are nonoverlapping areas used for planning, buying, and evaluating TV audiences and are generally a group of counties in which stations located in a metropolitan or central area achieve the largest audience share.Nielsen Station Index (NSI) reports information on viewing by time periods and programs and includes audience size and estimates of viewing over a range of demographic categories for each DMA.