arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1808.07569cs.AIcs.LGstat.ML
收藏

基于特征学习的鲁棒反事实推理及其应用

Robust Counterfactual Inferences using Feature Learning and their Applications

Walmart Labs(沃尔玛实验室)

Abhimanyu Mitra, Kannan Achan, Sushant Kumar

摘要:

在各种各样的应用中,包括个性化,我们希望测量由于干预而导致的结果差异,因此必须处理反事实推理。在任何一种情况下,来自客户的反馈都只是“强盗反馈”--也就是说,基于我们是否选择干预的部分反馈。通常进行随机实验,以了解干预是否总的来说比没有干预更好。在这里,我们提出了一个功能学习算法,从一个随机实验中学习,其中考虑的干预措施是最有效的,而不是只关注整体影响,从而为我们的学习机制添加了一个上下文,并提取更多的信息。从随机实验中,我们学习将人群划分为子人群的特征表示,在这些子人群中,我们观察到接受干预的人群和未接受干预的人群之间的平均客户反馈存在统计学显著差异,显著性水平为l,其中l是我们模型中的可配置参数。我们使用这些信息来获得干预的价值,并考虑到人口中的每个实例。通过实验,我们表明,使用这种额外的学习,在未来的干预中,可以利用每个实例的上下文来决定是否进行干预。

英文摘要:

In a wide variety of applications, including personalization, we want to measure the difference in outcome due to an intervention and thus have to deal with counterfactual inference. The feedback from a customer in any of these situations is only 'bandit feedback' - that is, a partial feedback based on whether we chose to intervene or not. Typically randomized experiments are carried out to understand whether an intervention is overall better than no intervention. Here we present a feature learning algorithm to learn from a randomized experiment where the intervention in consideration is most effective and where it is least effective rather than only focusing on the overall impact, thus adding a context to our learning mechanism and extract more information. From the randomized experiment, we learn the feature representations which divide the population into subpopulations where we observe statistically significant difference in average customer feedback between those who were subjected to the intervention and those who were not, with a level of significance l, where l is a configurable parameter in our model. We use this information to derive the value of the intervention in consideration for each instance in the population. With experiments, we show that using this additional learning, in future interventions, the context for each instance could be leveraged to decide whether to intervene or not.

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。

↑