JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2023, Vol. 58 ›› Issue (7): 18-31.doi: 10.6040/j.issn.1671-9352.0.2021.417

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R&D innovation strategy and behavior choice of competition drug supply chain

Yan WEN*(),Xiyuan YU,Jinsong HU   

  1. School of Business, Qingdao University, Qingdao 266071, Shandong, China
  • Received:2021-06-09 Online:2023-07-20 Published:2023-07-05
  • Contact: Yan WEN E-mail:wenyan@qdu.edu.cn

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Abstract:

Based on the short-sighted and far-sighted behaviors of members of competitive drug supply chain, four dynamic differential game models were constructed to study the influences of different behavior choices, changes in competition intensity and reimbursement ratio of medical insurance on drug manufacturers' R & D innovation investment, medical institution' cost-sharing strategies and supply chain performance. The study found that although the competition between drug manufacturers harms the profits of short-sighted manufacturer, it increases the overall performance of the drug supply chain and promotes the higher R & D innovation investment of far-sighted manufacturer. With higher reimbursement rate, both far-sighted drug manufacturer and medical institution have increased their profits, but not short-sighted drug manufacturer. In addition, medical institution sharing costs with one manufacturer would depress the profits of the other, when medical institution choose the behavior mode of sharing drug R & D innovation costs for two competing manufacturers simultaneously, they can benefit the profits of all members of the drug supply chain.

Key words: short-sighted and far-sighted behaviors, cost sharing, differential game, drug supply chain, competing manufacturer

CLC Number: 

  • F224

Fig.1

The structure of competitive drug supply chain"

Table 1

Meaning of key parameters in the model"

参数(i=1, 2) 含义
wi 制造商生产单位药品的边际利润
pi 医疗机构销售单位药品的边际价格
ρ 贴现因子
λ 研发创新投入对品牌商誉的影响因子
δ 制造商品牌商誉衰减系数
θ 扣除医保报销比例后的自付比例
m 医疗机构对制造商M1生产药品的推荐意愿
α、β、γ 边际价格、研发创新投入、品牌商誉分别对需求的影响因子
d 研发创新投入差异对需求的影响因子, 体现了制造商间的竞争强度
决策变量 Ii(t) t时刻的药品制造商研发创新投入
ϕ、Φ 医疗机构对制造商M1、M2的成本分担比例
状态变量 Gi(t) t时刻的制造商品牌商誉

Table 2

The impact of health insurance reimbursement ratio on supply chain performance"

1-θ VSSM1 VM2SS VRSS VFSM1 VM2FS VRFS VSFM1 VSFM2 VRSF VFFM1 VFFM2 VRFF
↑ - ↑ ↑ - ↑ ↑ - ↑ ↑ - ↑ ↑
↓ - ↓ ↓ - ↓ ↓ - ↓ ↓ - ↓ ↓

Fig.2

Impact of competition intensity on member strategies"

Fig.3

Impact of competition intensity on brand goodwill"

Fig.4

Impact of competition intensity on supply chain profit"

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