In an effort to better understand the impact of timing limits, the authors compare the learning outcomes of students who completed timed quizzes with students who took untimed quizzes in economics principles courses. Students were assigned two online quizzes--one timed and one untimed--and re-tested on the material the following class day. Our findings indicate that time limits do not significantly alter student learning. Thus, the decision of placing time limits should be based on factors (e.g. cheating, student preferences, etc.) other than student learning outcomes.