arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.03653cs.GT
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消费者参考效应下价格竞争中的无遗憾学习

No-regret Learning in Price Competitions under Consumer Reference Effects

Negin Golrezaei, Patrick Jaillet, Jason Cheuk Nam Liang

摘要:

我们研究了两个企业之间重复价格竞争的长期市场稳定性,其中消费者需求取决于企业的公布价格和消费者的价格预期称为参考价格。消费者的参考价格根据基于记忆的动态变化而随时间变化,这是所有历史价格的加权平均值。我们专注于企业不知道需求函数和参考价格是如何形成的,但可以访问一个甲骨文,提供了一个衡量消费者对当前公布的价格的反应的设置。我们表明,如果公司运行无悔算法,特别是,在线镜像下降(OMD),随着步长的减小,市场稳定的意义上,公司的价格和参考价格收敛到一个稳定的纳什均衡(SNE)。有趣的是,我们还表明,存在一个恒定的步长,在这个步长下,市场稳定下来。我们进一步表征收敛到SNE的速度为减少和恒定的OMD步长。

英文摘要:

We study long-run market stability for repeated price competitions between two firms, where consumer demand depends on firms' posted prices and consumers' price expectations called reference prices. Consumers' reference prices vary over time according to a memory-based dynamic, which is a weighted average of all historical prices. We focus on the setting where firms are not aware of demand functions and how reference prices are formed but have access to an oracle that provides a measure of consumers' responsiveness to the current posted prices. We show that if the firms run no-regret algorithms, in particular, online mirror descent(OMD), with decreasing step sizes, the market stabilizes in the sense that firms' prices and reference prices converge to a stable Nash Equilibrium (SNE). Interestingly, we also show that there exist constant step sizesunder which the market stabilizes. We further characterize the rate of convergence to the SNE for both decreasing and constant OMD step sizes.

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