Douglass C. North, a St. Louis economist who was a co-recipient of the 1993 Nobel Prize in economic sciences, has died. He was 95.

Washington University in St. Louis, speaking on behalf of the family, said North died Monday at his summer home in Benzonia, Michigan. A cause of death was not released.

North and Robert Fogel of the University of Chicago won the Nobel for research that applied economic theory and quantitative methods to explain economic and institutional change.

North was an economics professor at University of Washington for 33 years before coming to Washington University in St. Louis in 1983.

Survivors include his wife of 43 years, Elisabeth, along with three sons and four grandchildren. A memorial service will be scheduled later.