That makes at least two of us who did graduate work in mathematical economics and general equilibrium theory. Are there others?
I remember a 1979 conversation with Brian Ellickson at UCLA (when I was in law school and no longer doing mathematical economics) in which he said there were probably no more than 50 people in the world who could actually contribute to the literature, another 200 hundred or so who could follow most of it, and perhaps a thousand who would even try to read the literature.... it was a scary thought.