question: Before he began studying economics , what concept did Hayek come up with that was later featured in his 1952 book ?
answer: Hebbian learning
turker_answer: Before he began studying economics , Hayek came up with Hebbian learning , which was later featured in his 1952 book
rule-based: Before he began studying economics , Hayek came hebbian learning up with that was later featured in his 1952 book .