National Vital Statistics System HHS/CDC Ongoing Collected during vital events—births, deaths, marriages, divorces, and fetal deaths Legal authority for the registration of vital events resides individually with 50 states, 2 cities (Washington, DC, and New York City), and 5 territories (Puerto Rico, the Virgin Islands, Guam, American Samoa, and the Commonwealth of the Northern Mariana Islands) National State
Nielsen Media Research The Nielsen Company Ongoing Longitudinal panel Each household panel member participates for 2 years. Random digit dialing and online panel recruitment to obtain a sample that is as nationally representative as possible. Stratified sampling and oversampling of certain populations (e.g., youth, racial/ ethnic minorities) Approximately 25,000 households Households in the 48 contiguous states National Metropolitan Market groups (constructed by Nielsen) Contains data on exposure to food and beverage advertising as well as data on the frequency of television viewing, videogame, and Internet use each day (sedentary behaviors)

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