Every year a ranking of schools of architecture comes out, most recently compiled by Design Intelligence. A couple of years ago, I decided to do an unscientific ranking of my own, not based on what architecture deans think, or who employers are hiring, or the current enrollment statistics, but on the long-term product, that is, which schools produce the largest number of really outstanding architects. I compiled a list of the “best” living architects by starting with Priztker Prize winners, AIA Gold Medal recipients, Driehaus Prize winners, and then adding as many names of first-rank prominent practitioners (not academics) as I could think of. I ended up with 55 names. The results? A smattering of regional schools has one or two names, an outstanding alumni such as Steven Holl (Washington), Peter Bohlin (Carnegie Melon), or Michael Graves (Cincinnati). The top four ranks are occupied by (predictably) mostly the Ivy League. Cornell, Princeton, MIT and IIT have 5 percent of the list each; Penn, Columbia and Berkeley have 7 percent each; and mighty Harvard has 10 percent. The surprising result is that fully 40 percent of the names on my list are Yale grads. That is, as scientists say, statistically significant.