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Pietro Biroli & Daniela Del Boca & James J. Heckman & Lynne Pettler Heckman & Yu Kyung Koh & Sylvi Kuperman & Sidharth Moktan & Chiara D. Pronzato & Anna L. Ziff, 2018. "Evaluation of the Reggio approach to early education," Research in Economics, vol 72(1), pages 1-32. citation courtesy of

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