As usual, Professor Paul Krugman's piece in the Monday morning New York Times is causing a great deal of chatter among the political types. Krugman points out just how inept the Republican field is. In some cases he takes a scalpel (and in others a machete) to surely the weakest field of presidential aspirants any party has offered in modern American history (see my earlier CNN column comparing this field to 1980). I believe I can explain why this field is so inept. In order to proffer this explanation I am going to utilize Professor Krugman's field of economics.