http://www.nielsen.com/us/en/solutions/capabilities/digital-ad-ratings.html http://demandinstitute.org/projects/ https://www.ipo.org/ http://sites.nielsen.com/newscenter/nielsen-makes-the-ipo-top- 3938 DATA INTEGRITY ENSURES RELIABLE, ACCURATE AND MEANINGFUL DATA continued... time staff, while its membership consists of leading television, radio, print and Internet companies, as well as advertisers, advertising agencies and trade associations.