Web84 rows · as of august 2024, it is the primary part of nielsen holdings. Nmr began as a division of acnielsen, a marketing research firm founded in 1923. In 1996, nmr was. Webnielsen retired the diary methodology in july 2018, and all nielsen local markets are now measured year round. As a result, there are no longer only special “sweeps” months. Webdelivery dates for your nielsen audio services. To find the delivery date for a nielsen audio service, first select a market, then choose a survey, then a service…