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arXiv 2303.15652cs.LGcs.DS
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结构化动态定价:全局收缩模型中的最优遗憾

Structured Dynamic Pricing: Optimal Regret in a Global Shrinkage Model

University of Southern California(南加州大学);Adobe Research(奥多比研究院)

Rashmi Ranjan Bhuyan, Adel Javanmard, Sungchul Kim, Gourab Mukherjee, Ryan A. Rossi, Tong Yu, Handong Zhao

AI总结:

本文针对流式纵向数据下的动态定价问题,提出基于全局收缩模型和惩罚随机梯度下降的定价策略,实现了渐近最优遗憾,并证明利用结构信息对策略规划至关重要。

摘要:

我们考虑在流式纵向数据设置中的动态定价策略,其目标是在时间上最大化跨大量客户细分市场的累计利润。我们考虑一个动态模型,其中消费者的偏好以及价格敏感度随时间变化。基于消费者具有相似特征会以相似方式行动的已知发现,我们考虑一个全局收缩结构,该结构假设不同细分市场中消费者的偏好可以通过空间自回归(SAR)模型很好地近似。在这种流式纵向设置中,我们通过遗憾来度量动态定价策略的性能,遗憾是与预先知道模型参数序列的预知者相比的期望收入损失。我们提出了一种基于惩罚随机梯度下降(PSGD)的定价策略,并明确刻画了其遗憾作为时间、模型参数的时间变异性以及跨越不同客户细分市场的自相关网络结构强度的函数。我们的遗憾分析结果不仅证明了所提出策略的渐近最优性,而且表明在策略规划中纳入可用的结构信息至关重要,因为基于未收缩模型的策略在上述设置中高度次优。我们进行了涵盖广泛机制以及基于真实世界网络研究的模拟实验,并报告了我们所提出方法的令人鼓舞的性能。

英文摘要:

We consider dynamic pricing strategies in a streamed longitudinal data set-up where the objective is to maximize, over time, the cumulative profit across a large number of customer segments. We consider a dynamic model with the consumers' preferences as well as price sensitivity varying over time. Building on the well-known finding that consumers sharing similar characteristics act in similar ways, we consider a global shrinkage structure, which assumes that the consumers' preferences across the different segments can be well approximated by a spatial autoregressive (SAR) model. In such a streamed longitudinal set-up, we measure the performance of a dynamic pricing policy via regret, which is the expected revenue loss compared to a clairvoyant that knows the sequence of model parameters in advance. We propose a pricing policy based on penalized stochastic gradient descent (PSGD) and explicitly characterize its regret as functions of time, the temporal variability in the model parameters as well as the strength of the auto-correlation network structure spanning the varied customer segments. Our regret analysis results not only demonstrate asymptotic optimality of the proposed policy but also show that for policy planning it is essential to incorporate available structural information as policies based on unshrunken models are highly sub-optimal in the aforementioned set-up. We conduct simulation experiments across a wide range of regimes as well as real-world networks based studies and report encouraging performance for our proposed method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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