Private data sources,such as Information Resources,Inc.and Nielsen Indexes,are a low-cost secondary data source.

Name: Private data sources,such as Information Resources,Inc.and Nielsen Indexes,are a low-cost secondary data source.
Brand: Quizplus
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Private data sources, such as Information Resources, Inc. and Nielsen Indexes, often come with a high cost because they provide specialized, detailed, and up-to-date market information that is valuable for businesses and researchers.

Private Data Sources,such as Information Resources,Inc