Maintenance work on the ZORA database servers is scheduled for Thursday 25th July 2019 from 19:00-20:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Biroli, Pietro; Del Boca, Daniela; Heckman, James J; Heckman, Lynne Pettler; Koh, Yu Kyung; Kuperman, Sylvi; Moktan, Sidharth; Pronzato, Chiara D; Ziff, Anna L (2018). Evaluation of the Reggio approach to early education. Research in Economics, 72(1):1-32.