Vivvix’s National Spot Radio Service provides nationally placed spot radio data for approximately 4,000 stations in more than 225 markets.

Reported expenditures are based on audited billings from contract information provided by major national station representative organizations.

Summarized monthly expenditure information is collected by market, and is classified according to parent, brand and category. Radio data are mapped to the 210 monitored TV markets, and to the All Other designation when appearing outside these markets. Monthly expenditures are pro-rated across broadcast calendar weeks, according to the number of days in each week that fall within the standard calendar month.

The National Spot Radio Service and the Local Radio Historical Service each provide market-level brand expenditures, but no station occurrence detail. The Local Radio Service reports station-level occurrences and dollars for advertised brands.

Some advertising expenditures contained within the National Spot Radio Service are also reported in the Local Radio or Local Radio Historical media. The overlap occurs because the same advertising spot may be reported twice, once by the local station and once by the station’s national sales rep. The magnitude of the overlap is not known by Vivvix because the National Spot Radio expenditure information is provided at the market-level, not the station-level.