I analyse a model where workers self-select in the educational occupation in a way which is correlated with their beliefs about the working of the market economy. Teachers have a disproportionate effect on the transmission of beliefs. Therefore, they generate a bias which makes it harder for the population to learn the true parameters of the economy if these are favourable to the market economy. Two parameters determine this bias. Social entropy defines how predictable one's occupation is as a function of one's beliefs. Heritability is the weight of the family's beliefs in the determination of the priors of a new generation. Both heritability and social entropy reduce the bias and make it easier to learn that the market economy is “good”, under the assumption that it is.