On April 12, 1914, American economist Armen Alchian was born. His contributions to economic theory and teaching were many and varied — his textbook, co-authored with William R. Allen, University Economics (also titled Exchange and Production), was widely considered one of the finest intermediate texts in microeconomics — but he remains perhaps best known for his work on property rights.
Alchian died in 2014, in late February, at the age of 99.