I am trying to find a quicker way to mark answer sheets using stata (over 500 answer sheets with each having about 100 questions). The questions are Multiple Choice Questions (6 options - A, B, C, D, E, F); only one answer is correct. So, I have responses from the 500 students in one stata file. Variables list is in the following manner: Student_Code, Subject_Code, Q1, Q2, Q3....Q100. And i have correct answers in another stata file in the following variables: Subject_Code, Q1, Q2, Q3...Q100. If anyone can make any suggestions regarding how to go about it in STATA.. it will be great. thanks.