I wonder if the study had been conducted in the following radically
different way instead whether it had resulted in a different outcome.
Studying the effect of a class that implicitly (if not explicitly)
inculcates self-interest is, if Nobel Prize-winning economist Oliver
Williamson to be believed
Re: seeking empirical evidence about ethics instruction
A recent publication at FSE attempted to evaluate the impact of the new
ACM code of ethics on decision-making and found no evidence of an effect
according to their methodology. You can read the paper here:
https://people.engr.ncsu.edu/e