Re20:读论文 What About the Precedent: An Information-Theoretic Analysis of Common Law

简介: Re20:读论文 What About the Precedent: An Information-Theoretic Analysis of Common Law

1. Background


  1. Halsbury’s:认为先例的arguments是重点(实验结果:√)

Goodhart’s:认为先例的事实是重点

(前者比后者更强调推理,后者的假设是如果不想和先例一样,说先例事实不同比推翻先例更容易)


  1. ratio decidendi:判决理由,文中指以先例的arguments或者facts作为判决理由。


2. 模型


image.png

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5ba11c3bba8c4310862c572d7a467934.png

image.png

image.png


用神经网络来近似:

image.png


3. 实验


3.1 数据集

ECHR数据集,案例文本可切分为facts, arguments(法官的解释) and outcome. Arguments cite relevant cases, also known as the precedent

子语料:包含去重的案例引用关系


3.2 实验设置

Longformer

超参:由于资源有限,隐藏层维度50,batch size 16,将每个案例truncate到512个tokens。

4 Nvidia P100 16GiB GPU

最多6小时


3.3 实验结果

image.png

交叉熵小、MI大

image.png

6b1e04dab78e4f3382f6fa7d4bf52dee.png

探讨了一些法条跟别的法条不一样的情况,比如因为发生太晚所以被truncate了……

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