Decision-making under normative uncertainty requires an agent to aggregate the assessments of options given by rival normative theories into a single assessment that tells her what to do in light of her uncertainty. But what if the assessments of rival theories differ not just in their content but in their structure—for example, some are merely ordinal while others are cardinal? This article describes and evaluates three general approaches to this “problem of structural diversity”: structural enrichment, structural depletion, and multistage aggregation. Each approach has notable drawbacks, but I tentatively defend multistage aggregation as least bad of the three.

中文翻译：

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差异万岁？结构多样性是元规范理论的挑战

规范不确定性下的决策需要代理将竞争规范理论给出的选项评估汇总成一个单一的评估，该评估告诉她根据不确定性该做什么。但是，如果对敌对理论的评估不仅在内容上而且在结构上都不同——例如，有些只是序数，而有些则是基数？本文描述并评估了解决“结构多样性问题”的三种一般方法：结构富集、结构耗竭和多级聚合。每种方法都有明显的缺点，但我暂时认为多级聚合是三种方法中最不坏的。