1. Quasi-experimental designs that were not covered in the text. For example, you might use handout 13.1 and handout 13.2 to discuss the regression-discontinuity design; and2. Sophisticated statistical treatments of quasi- experimental designs.
Useful classic resources for discussing advanced issues in quasi-experimental design include
Cook, T. D. & Campbell, D. T. (1979). Quasi-experimentation:
Design and analysis for field settings
. Chicago: Rand
McNally.
Kenny, D. A. (1979). Correlation and causality. New York: John Wiley.