Half And Half Is Not Enough (VIDEO) Bocconi University This video is under embargo. Please login to access this video. Caption Selim Gulesci, Professor of Development Economics at Bocconi University, Milan, explains how a simple change in crop-sharing contracts in developing countries could boost productivity. Tenants should receive 75% of the crop. Credit Bocconi University and VAS Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.