Proprietary search data sources

July 21, 2024
by a searcher from University of Pennsylvania - The Wharton School in Los Angeles, CA, USA
What data sources to find businesses in a proprietary search have people found most helpful, and why? E.g., Grata, SourceScrub, Data Axle etc.
from Duke University in New York, NY, USA
from Pennsylvania State University in Orlando, FL, USA