A Note on Input Price Discrimination Under Bertrand Competition: Simultaneous vs. Sequential Contracting

A Note on Input Price Discrimination Under Bertrand Competition: Simultaneous vs. Sequential Contracting
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关于伯特兰竞争下的投入价格歧视的说明:同时承包与顺序承包

DOI:
10.1007/s11151-022-09873-y
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发表时间:
2022
影响因子:
1.1
通讯作者:
Lim Seonyoung
Lim Seonyoung
中科院分区:
经济学4区
文献类型:
--
作者:
Choi Kangsik;Lee DongJoon;Lim Seonyoung

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在Bertrand竞争下,通过允许供应商与非对称零售商同时或依次签订合同,分析了禁止价格歧视对投入品市场的福利影响。与古诺竞争相比,我们发现:(i)在顺序契约下,垄断供应商更倾向于先与低效率零售商签订契约,再与高效率零售商签订契约;(ii)当比较统一定价下同时和顺序契约下的消费者剩余和社会福利时,我们发现:(i)在顺序契约下,垄断供应商更倾向于先与低效率零售商签订契约,再与高效率零售商签订契约;(ii)当比较统一定价下同时和顺序契约下的消费者剩余和社会福利时,垄断供应商更倾向于先与低效率零售商签订契约,然后与高效率零售商签订契约。价格歧视),消费者剩余和福利都较小(分别为在连续收缩中比在同时收缩中更大)。然而,在伯特兰竞争下,供应商总是倾向于同时签订合同,而不是顺序签订合同,因此顺序签订合同不会发生。同时,在合同,消费者剩余和总福利更高的统一定价比价格歧视。
By allowing the supplier to contract simultaneously or sequentially with asymmetric retailers under Bertrand competition, we analyze the welfare implications of banning price discrimination in input markets. In contrast to Cournot competition, we find that: (i) under sequential contracting, the monopolistic supplier prefers to contract with an inefficient retailer first and an efficient retailer later; and (ii) when comparing consumers' surplus and social welfare under simultaneous and sequential contracting with uniform pricing (resp. price discrimination), consumers' surplus and welfare are smaller (resp. greater) in sequential contracting than in simultaneous contracting. However, the supplier always prefers simultaneous contracting over sequential contracting under Bertrand competition; and thus sequential contracting does not occur. And, in simultaneous contracting, consumer surplus and total welfare are higher for uniform pricing than price discrimination.
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