Revenue and risk sharing in view of uncertain demand during the pandemics Yen-Deng Huang, Gede Agus Widyadana, Hui Ming Wee and Mauricio Fontoura Blos RAIRO-Oper. Res., 56 3 (2022) 1807-1821 Published online: 30 June 2022 DOI: 10.1051/ro/2022076