VNU Journal of Economics and Business, Vol 1, No 2 (2021) 95 102 95 Original Article Impact of the Input Subsidy on Farming Productivity of Maize Farmers in Son La and Hoa Binh provinces, Vietnam To The Nguyen*, Nguyen Anh Tuan VNU University of Economics and Business, 144 Xuan Thuy, Cau Giay, Hanoi, Vietnam Received 08 December 2020 Revised 20 December 2020; Accepted 20 December 2020 Abstract Developing the agricultural system has been an urgent issue of the Vietnamese government recently A wid[.]