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Fast and Accurate Inference of Plackett-Luce Models

机译:Plackett-Luce模型的快速准确推断

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We show that the maximum-likelihood (ML) estimate of models derived from Luce's choice axiom (e.g., the Plackett-Luce model) can be expressed as the stationary distribution of a Markov chain. This conveys insight into several recently proposed spectral inference algorithms. We take advantage of this perspective and formulate a new spectral algorithm that is significantly more accurate than previous ones for the Plackett-Luce model. With a simple adaptation, this algorithm can be used iteratively, producing a sequence of estimates that converges to the ML estimate. The ML version runs faster than competing approaches on a benchmark of five datasets. Our algorithms are easy to implement, making them relevant for practitioners at large.
机译:我们表明,源自升的选择公理(例如Plackett-Luce模型)的模型的最大可能性(ML)估计可以表示为马尔可夫链的固定分布。这会对几个最近提出的光谱推理算法传达了洞察力。我们利用这种视角,并制定了一种新的光谱算法,这些谱算法比Plackett-Luce模型的前一元更准确。通过简单的适应性,可以迭代地使用该算法,从而产生一系列收敛于ML估计的估计序列。 ML版本比五个数据集的基准上的竞争方法速度快。我们的算法易于实施,使其与大型从业者相关。

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