What organization is the largest marketing research organization in the world?

Please provide a link with you answer or if you have a website that could lead me to the answer. Thank you.

What organization is the largest marketing research organization in the world?
The U.S. government.
Reply:Honomichl US Top 50 and Global Top 25 ranks the top market research companies both in the US and in the world





The #1 in the US and in the world is Nielsen in terms of global research revenues.





You can find the report at the American Marketing Association website http://www.marketingpower.com/content196... (both reports in PDF)