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Strategic inventory under suppliers competition

  • * Corresponding author: Xingzheng Ai

    * Corresponding author: Xingzheng Ai 
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  • This paper investigates the impact of competition and the strategic inventories on the performance of a supply chain comprising two competing suppliers and one retailer. Existing literature has shown that the retailer's optimal strategy in equilibrium is to carry inventories, and the suppliers are unable to prevent this. In contrast, our results show that the suppliers will prevent the retailer from carrying strategic inventories when the degree of competition between suppliers is high, and the retailer's carrying strategic inventory is not necessary to force suppliers to lower the future wholesale price. We also find the substitutable relationship between the effect of strategic inventories and the effect of competition. When the degree of competition increases, the suppliers are worse off but the retailer and the total supply chain are both better off when carrying strategic inventories. The retailer could introduce profit sharing contracts so as to encourage suppliers to support strategic inventories which enhance the entire performance of the supply chain.

    Mathematics Subject Classification: Primary: 90B05, 90B50; Secondary: 90C40.

    Citation:

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  • Figure 1.  The relationship between $ r $ and $ h_{0} $ when $ a = 10 $

    Figure 2.  The relationship between $ r $ and $ I^{i} $ when $ a = 10, h = 0.5 $

    Figure 3.  the relationship $ h $ and $ r $ with $ a = 1 $

    Figure 4.  Improvement performance

    Figure 5.  the relationship between $ \beta $ and $ r $ with $ a = 10, h = 0.2 $

    Table 1.  The Equilibrium Outcome

    The Dynamic ContractThe Commitment Contract
    $\left( {w_{1}^{\ast } , w_{2}^{\ast } } \right)$ $\left( {\begin{array}{l} \dfrac{2a(3-r)^{2}(3-2r-r^{2})-h(12-24r+9r^{2}+2r^{3}-r^{4})}{102-81r+9r^{2}+8r^{3}-2r^{4}}, \\ \dfrac{(2-r)(2a(3-r)(1-r)(3+r)+h(30-r(9+(3-r)r)))}{102-81r+9r^{2}+8r^{3}-2r^{4}}\end{array}} \right)$ $\left( {\dfrac{a(1-r)}{2-r}, \dfrac{a(1-r)}{2-r}} \right)$
    $\left( {p_{1}^{\ast } , p_{2}^{\ast } } \right)$ $\left( {\begin{array}{l} \dfrac{a(156-153r+21r^{2}+16r^{3}-4r^{4})-h(2-r)(6-9r+r^{3})}{2(102-81r+9r^{2}+8r^{3}-2r^{4})}, \\ \dfrac{a(138-r(135-r(23+2r(7-2r)))) +h(2-r)(30-r(9+(3-r)r))}{2(102-81r+9r^{2}+8r^{3}-2r^{4})} \end{array}} \right)$ $\left( {\dfrac{a}{2(2-r)}, \dfrac{a}{2(2-r)}} \right)$
    $I^{{\rm \ast }}$ $\dfrac{a(30-39r+8r^{2}+r^{3})-h(2-r)^{2}(30-9r-3r^{2}+r^{3})}{2(1-r^{2})(102-81r+9r^{2}+8r^{3}-2r^{4})}$ 0
    $\left( {Q_{1}^{\ast } , Q_{2}^{\ast } } \right)$ $\left( {\begin{array}{l} \dfrac{2a(1-r)(39-r(9+2r))+h(2-r)(r(33+6r-4r^{2})-54)}{2(1-r^{2})(102-81r+9r^{2}+8r^{3}-2r^{4})}, \\\dfrac{(2-r)(2a(3-r)(1-r)(3+r)+h(30-r(9+(3-r)r)))}{2(1-r^{2})(102-81r+9r^{2}+8r^{3}-2r^{4})} \end{array}} \right)$ $\left( {\begin{array}{l} \dfrac{a}{2(2-r)(1+r)}, \\ \dfrac{a}{2(2-r)(1+r)}\end{array}} \right)$
    $\pi_{m}^{\ast } $ $\dfrac{h^{2}(2-r)^{2}D-4ahE+4a^{2}K}{2(1-r^{2})(102-81r+9r^{2}+8r^{3}-2r^{4})^{2}}$ $\dfrac{a^{2}(1-r)}{(r+1)(2-r)^{2}}$
    $\pi_{b}^{\ast } $ $\dfrac{h^{2}(2-r)^{2}A-2ahB+a^{2}C}{2(1-r^{2})(102-81r+9r^{2}+8r^{3}-2r^{4})^{2}}$ $\dfrac{a^{2}(1-r)}{(r+1)(2-r)^{2}}$
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  • [1] K. AnandR. Anupindi and Y. Bassok, Strategic inventories in vertical contracts, Management Science, 54 (2008), 1792-1804. 
    [2] A. AryaH. Frimor and B. Mittendorf, Decentralized procurement in light of strategic inventories, Management Science, 61 (2015), 487-705.  doi: 10.1287/mnsc.2014.1908.
    [3] A. Arya and B. Mittendorf, Managing strategic inventories via supplier-to-consumer rebates, Management Science, 59 (2013), 813-818. 
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    [7] O. ForosK. P. Hagen and H. J. Kind, Price-dependent profit sharing as a channel coordination device, Management Science, 55 (2009), 1280-1291. 
    [8] R. HartwigK. InderfurthA. Sadrieh and G. Voigt, Strategic inventory and supply chain behavior, Production and Operations Management, 24 (2015), 1329-1345.  doi: 10.1111/poms.12325.
    [9] B. Mantin and L. Jiang, Strategic inventories with quality deterioration, European Journal of Operational Research, 258 (2017), 155-164.  doi: 10.1016/j.ejor.2016.08.062.
    [10] J. J. Rotmeberg and G. Saloner, Cyclical behavior of strategic inventories, Quart. J. Econom., 104 (1989), 73-97. 
    [11] G. Saloner, The role of obsolescence and inventory costs in providing commitment, Internat. J. Indust. Organ., 4 (1986), 333-345.  doi: 10.1016/0167-7187(86)90025-1.
    [12] W. ShangAY. Ha and S. Tong, Information sharing in a supply chain with a common retailer, Management Science, 62 (2016), 1-301.  doi: 10.1287/mnsc.2014.2127.
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