The first undergraduate economics programme was created in Cambridge, but before his appointment Alfred Marshall was employed as a tutor by Balliol College Oxford. This chapter explains why, if Marshall had remained in Oxford, and even if he had succeeded the incumbent Professor of Political Economy, he would not have been able to achieve in Oxford what he did in Cambridge, after his appointment there in late 1884. The reason for this lies in the curricular differences between Oxford and Cambridge—in Oxford, Classics was the primary degree for much of the nineteenth century, with a minor Mathematics path—and also the relationship between college and university. In Cambridge, lecturing on the various Triposes was organised at the level of the university, by Special Boards of Study; arguments could therefore be made in university debates that could then result in university-wide changes. In Oxford, by contrast, lecturing was organised directly by colleges among themselves, cutting out the prospect of discussion at the level of the university itself. This and other differences between Oxford and Cambridge militated against the kind of innovations possible in Cambridge, with for example the establishment of the Natural Sciences Tripos in the 1870s.