par izglītību
"If you're narrowly self-interested, belief in signaling should actually increase your educational attainment. The mechanism: Suppose you harbor doubts about the usefulness of some of the curriculum. Every marginally observant student occasionally asks himself, "Am I really going to use this stuff after graduation?" The signaling model silences these inner doubts: "The market rewards academic performance even if you are studying utterly useless material. So suck it up and stay in school." "

http://econlog.econlib.org/archives/2012/09/how_does_belief.html