The term originates from research by Rex Briggs in 1997, when he was conducting exposed/control experiments with online advertising for Ford Fiesta in the UK.
Rex Stout | Rex Ryan | Rex Harrison | Nicholas Briggs | Raymond Briggs | Rex Allen | Arthur Briggs (rugby) | Rex Hunt | Erreway en Grand Rex | Briggs & Stratton | Wilma Briggs | Shannon Briggs | Rex Hagon | Rex Beach | Walter Briggs, Sr. | Rex Records | Rex Murphy | Rex (Live at the Fillmore) | Rex Applegate | Rex | Henry Briggs | Austin Briggs | SS Rex | Rex Williams | Rex Linn | Rex Lassalle | Peter Briggs | George N. Briggs | Benjamin Briggs | William Briggs |