Experimental Design
This study uses a randomized control trial to study the impact of email nudges on students’ major and minor declaration decisions. We will have two treatment arms targeting different groups of students. Group 1 will be students who received A- or higher in the introductory level economics course in Fall 2022, and group 2 will be students who received between B+ and B-. We will randomly assign students into treatment and control groups within grade groups. Thus, we have treatment 1, control 1, treatment 2, and control 2. We have a sample size of 1610 students for group 1, divided into 809 students for treatment 1 and 801 for control 1. We have 800 students for group 2, divided into 402 students for treatment 2 and 398 for control 2. Randomization is done in a secure office by a password-protected computer.