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Nielsen Corporation
The
Nielsen Corporation
, self-referentially known as
The Nielsen Company
, and formerly known as
ACNielsen
or
AC Nielsen
is a global
marketing research
firm, with worldwide headquarters in
New York City
,
United States
. Regional headquarters for
North America
are located in the
Chicago
suburb of
Schaumburg, Illinois
. As of May 2010, it is part of
Nielsen Holdings
.
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