Z:gnu-www-ja-frank--2e951b-For each of the four questions/en

For each of the four questions, each student was coded as being &ldquo;more honest&rdquo; if the probability checked for that question rose between September and December; &ldquo;less honest&rdquo; if it fell during that period; and &ldquo;no change&rdquo; if it remained the same. Our hypothesis was that even a single semester of introductory microeconomics would have a measurable effect both on students' expectations of the level of self-interested behavior in society and on their own propensities to behave self-interestedly.