A supply chain network equilibrium with random demand under disruptions

Investigate a supply chain network equilibrium model consisting of manufacturers and competing retailers who face with random demand at their outlets. Aimming at the broken equilibrium resulting from an emergent event, which maybe make the demand disruptions, this paper designs a buy back contract. It´s proved that the anti-disruption-ability of the supply chain network will be improved with the buy back contract through a numerical example.