Nielsen index is a series of data analysis based on consumers' confidence in the job market, personal financial situation and consumption willingness. Nielsen is the world's leading media and information group, providing the world's leading market information (AC Nielsen), media information (Nielsen Media Research), online surveys (NetRatings and BuzzMetrics), mobile media monitoring, commercial exhibition services and commercial publishing information (Billboard, Hollywood Reporter and Adweek). Nielsen Company is a private company, covering more than 65,438+000 countries around the world, headquartered in Harlem, the Netherlands and new york, USA. For details, please visit Nielsen's global website www.nielsen.com.