Roth and Shapley
FYI to teachers of introductory economics: I use Al's article on Repugnance as a Constraint on Markets as an ancillary reading in ec 10.
Random Observations for Students of Economics
I am the Robert M. Beren Professor of Economics at Harvard University, where I teach introductory economics (ec 10). I use this blog to keep in touch with my current and former students. Teachers and students at other schools, as well as others interested in economic issues, are welcome to use this resource.