RT Journal Article SR 00 A1 Aghion, Philippe A1 Bolton, Patrick A1 Harris, Christopher A1 Jullien, Bruno T1 Optimal Learning by Experimentation JF Review of Economic Studies YR 1991 FD 1991 VO 58 SP 621 OP 654 LK https://publications.ut-capitole.fr/id/eprint/1333/ UL http://tse-fr.eu/pub/2347