新南威尔士州电子计票分析
An analysis of New South Wales electronic vote counting
摘要：
我们重新审视2012年澳大利亚新南威尔士州的地方政府选举。计票是使用单一可转移投票（STV）的随机表格以电子方式进行的。众所周知，随机性确实会对某些席位的结果产生影响。我们描述了如何修改的过程中，包括一个示范的随机性是公平的选择。其次，更重要的是，我们发现了官方计票软件中的一个错误，这导致了格里菲斯委员会的计票错误，候选人里娜·默库里险些错过了一个席位。我们认为软件错误错误地将Mercuri的获胜概率降低到了10%左右--根据我们的计算，她应该有91%的概率获胜。当我们指出错误时，新南威尔士州选举委员会（NSWEC）纠正了他们的代码，并发表了他们自己的声明。此后，我们调查了2016年地方政府选举（在纠正上述错误后举行），发现了两个新的错误。我们在NSWEC发布结果几天后通知了他们这些错误。
英文摘要：
We re-examine the 2012 local government elections in New South Wales, Australia. The count was conducted electronically using a randomised form of the Single Transferable Vote (STV). It was already well known that randomness does make a difference to outcomes in some seats. We describe how the process could be amended to include a demonstration that the randomness was chosen fairly. Second, and more significantly, we found an error in the official counting software, which caused a mistake in the count in the council of Griffith, where candidate Rina Mercuri narrowly missed out on a seat. We believe the software error incorrectly decreased Mercuri's winning probability to about 10%---according to our count she should have won with 91% probability. The NSW Electoral Commission (NSWEC) corrected their code when we pointed out the error, and made their own announcement. We have since investigated the 2016 local government election (held after correcting the error above) and found two new errors. We notified the NSWEC about these errors a few days after they posted the results.
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