Luckily, there are an increasing number of scholarly studies and essays on plagiarism. Here are a few, please add your own as you encounter them:
Improving Online Assignments to Deter Plagiarism
Alan McCord, Lawrence Technological University, USA (pages 41-49)
"Institutional issues in deterring, detecting and dealing with student plagiarism" and "Deterring, Detecting and Dealing with Student Plagiarism" available from:
Devlin, M. and Gray, K. (2007). In their own words: a qualitative study of the reasons Australian university students plagiarize. Higher Education Research & Development, 26(2), 2007, 181 – 198. [Available from Lane Library - online databases]
Devlin, M. (2006). Policy, preparation, and prevention: Proactive minimization of student
plagiarism. Journal of Higher Education Policy & Management, 28(1), 45-58. [Available from Lane Library - online databases]