Instruction from the Dean of Bachelor Studiues on changing the field of study   

1. In first cycle programmes students declare to pass a set of courses indicating their major by the end of the second semester.
2. In first cycle programmes with instruction in a foreign language and second cycle programmes the field shall be selected by the candidate during the admission process. 
(§ 11 Rules and Regulations of of first and second cycle programmes at the Warsaw School of Economics)

1. A student may complete his/her study in his/her field's major or in an interdisciplinary major if he/she receives positive assessment in all courses comprising a given major and in the case of a field's major submits a thesis on a related subject matter. A thesis may constitute a basis for graduating from more than one field major following the supervisor's and major tutor's recommendation in writing concerning its correspondence with educational results set for both majors.
2. At a student's request graduation from a field major shall be documented with an entry in the diploma and graduation from an interdisciplinary major - with a certificate. The application for a diploma entry concerning a field major graduation should be submitted by the date of submitting the thesis at the latest. (§ 17 Rules and Regulations of of first and second cycle programmes at the Warsaw School of Economics)