Half And Half Is Not Enough (video) Bocconi University Share Print E-Mail Loading 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 Share Print E-Mail 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.