Assessing the Impact of Exogenous Shocks on Production Efficiency in Agri-Startups: A Case Study of Organic Agricultural Cooperatives in Hung Yen, Vietnam Journal title: Organic Farming Authors: Hai-Dang-Nguyen, Vu Van Phuc, Thi-Hong-Diep Pham, Quoc Hoi Le, Huong Ho Subject(s): Environmental Sciences, Agricultural Science