Søren Johansen (born 6 November 1939) is a Danish statistician and econometrician who is known for his contributions to the theory of cointegration.
He began his academic career at the University of Copenhagen, Institute of Mathematical Statistics in 1964 and was promoted to full professor in 1989.
In 1967 he obtained the Gold medal from University of Copenhagen for the thesis "An application of extreme points methods in probability" and in 1974, he became dr. phil.
Johansen visited UCSD where he interacted with Robert Engle and Clive Granger during the years that the theory on cointegration was taking shape.
Juselius is the author of "The Cointegrated VAR Model: Methodology and Application" (2006) from Oxford University Press.