The modified major in Economics is identical to the minor, except that it also requires four major-level courses in another department or program. It is intended to fit the needs of students who have a definite interest in Economics but are interested also in studying some specific problem or topic that falls partly in the field of economics and partly in a related field. The ten courses that make up the modified major must form a unified, coherent whole, and not consist of a series of unrelated courses. A student planning a modified major must prepare a written statement for the registrar explaining the rationale for the planned courses. Each student’s major card and justification must be approved by the Vice Chair of the department. If all of the four additional courses are in one department (e.g. mathematics), and this department allows it, a second signature on the major card will result in the major of Economics modified with Mathematics. If the four additional courses are in multiple departments, or one department that does not allow modifications (e.g. Government), there is no need for a second signature and the major is just Economics modified.

It is also possible to do another department major modified with Economics. Such a major is appropriate when the primary area of interest is not Economics, but the specific topic of interest will benefit from related Economics courses. Such a major has the same prerequisites as the regular Economics major. The four additional courses in Economics must either: contain both 21 and 22, or contain a major sequence of at least 2 courses and one of either 21 or 22. As above, the ten total classes must form a unified, coherent whole, and not consist of a series of unrelated courses.