Abstract:

The close cooperation between government and enterprise is crucial to ensure the timely supply and rapid delivery of emergency supplies. In order to ensure the effective supply of spot supplies after the disaster and improve the government's ability to guarantee emergency supplies， emergency supplies procurement is studied with second order opportunities， and a two-stage government-enterprise cooperation model is constructed before and after the emergencies. Before the disaster， the government and enterprises use decision-making games to determine the optimal government prepayment ratio and enterprise reserves； after the disaster， considering that the commercial inventory of agreement enterprise is used as an emergency supplement to the demand beyond the initial reserve， two parties determine the optimal government pre-subsidy coefficient and the enterprise's commercial inventory ratio during the second order process. In addition， numerical examples and sensitivity analysis are used to verify the effectiveness of the model. Furthermore， the advantages of emergency supplies procurement are also explored with second order， and the impact of different system parameters on the decision-making of both parties is analyzed.Finally，some practical management implications for government procurement and enterprise reserve are proposed.

Key words: emergency material supply, emergency supplies pre-positioning, the second order, commercialinventory