1. Center for Sustainable and Inclusive Development Studies, Faculty of Economics and Management, Universiti Kebangsaan Malaysia(UKM), Bangi 43600, Selangor, Malaysia
2. Economics and Industry Development Division, Malaysian Palm Oil Board (MPOB), Bandar Baru Bangi, Kajang 43000, Selangor, Malaysia
3. Smallholder Development Research Division, Malaysian Palm Oil Board (MPOB), Bandar Baru Bangi, Kajang 43000, Selangor, Malaysia