1 million weekly listening diaries, which comprise the foundation for radio station rating reports. Retail advertising impact data across 58 major U.S. markets. Quarterly reports on consumption attitudes and behaviors in Eastern Europe. More companies are using existing data. Secondary data is more readily available.
Secondary data is often highly valid.
Secondary data is often less expensive to secure than primary data. The McGraw-Hill Companies. Any use is subject to the Terms of Use and Privacy Policy .