{
  "id": 14443,
  "title": "Simultaneous bids by one bidder for the same auction",
  "url": "/competitions/facebook-recruiting-iv-human-or-bot/discussion/14443",
  "author_name": "",
  "post_date": "2015-05-29T20:31:10.980Z",
  "votes": 1,
  "comment_count": 6,
  "views": 1076,
  "content": "<p>How can it be possible for&nbsp;one bidder to make&nbsp;multiple simultaneous bids on different devices, and in some cases, from different countries?</p>\n<p>For example, look at bidder_id&nbsp;f5b2bbad20d1d7ded3ed960393bec0f40u6hn&nbsp;for auction&nbsp;uu6z3 at time&nbsp;9704713526315789</p>",
  "messages": [
    {
      "id": "80417",
      "postDate": "05/29/2015 20:31:10",
      "content": "<p>How can it be possible for&nbsp;one bidder to make&nbsp;multiple simultaneous bids on different devices, and in some cases, from different countries?</p>\n<p>For example, look at bidder_id&nbsp;f5b2bbad20d1d7ded3ed960393bec0f40u6hn&nbsp;for auction&nbsp;uu6z3 at time&nbsp;9704713526315789</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "80423",
      "postDate": "05/29/2015 22:59:52",
      "content": "<p>Might be a bot? I would imagine having access through different proxies (hence different IP and countries) is possible.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "80458",
      "postDate": "05/30/2015 14:41:45",
      "content": "<p>I also discern&nbsp;this. The trick is that the bidder is not marked&nbsp;as a bot in the training csv....</p>\n<p>However, this is just our&nbsp;common sense. The&nbsp;auction experts would have their considerations.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "80465",
      "postDate": "05/30/2015 16:24:38",
      "content": "<p>[quote=KnightQi;80458]</p>\n<p>The trick is that the bidder is not marked&nbsp;as a bot in the training csv....</p>\n<p>However, this is just our&nbsp;common sense. The&nbsp;auction experts would have their considerations.</p>\n<p>[/quote]</p>\n<p>But that's the thing, it has been mentioned that many of the outcomes&nbsp;were hand labelled&nbsp;and some were stats based. (Implying that the stats alone missed many bots and hand labeling doesn't sound very scale-able or thorough to me). In my opinion mis-classifications have been made.&nbsp;</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "80472",
      "postDate": "05/30/2015 19:05:36",
      "content": "<p>Oh dear Lord! What's with the down-votes, that's a valid question to ask in my opinion! :D And none of the answers really help with establishing solution features/models etc.&nbsp;</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "80473",
      "postDate": "05/30/2015 19:08:03",
      "content": "<p>I think I understand why.&nbsp;This&nbsp;is definitely&nbsp;a valid question to think about, but perhaps&nbsp;not in public. Like many others have said before, the data is noisy, and how we deal with it is part of the challenge.&nbsp;</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "80474",
      "postDate": "05/30/2015 19:20:13",
      "content": "<p>Alright then! :)</p>",
      "rawMarkdown": "",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 80423,
      "author_name": "sushanttripathy",
      "author_url": "",
      "post_date": "05/29/2015 22:59:52",
      "content": "<p>Might be a bot? I would imagine having access through different proxies (hence different IP and countries) is possible.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 80458,
      "author_name": "huangqi",
      "author_url": "",
      "post_date": "05/30/2015 14:41:45",
      "content": "<p>I also discern&nbsp;this. The trick is that the bidder is not marked&nbsp;as a bot in the training csv....</p>\n<p>However, this is just our&nbsp;common sense. The&nbsp;auction experts would have their considerations.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 80465,
      "author_name": "sushanttripathy",
      "author_url": "",
      "post_date": "05/30/2015 16:24:38",
      "content": "<p>[quote=KnightQi;80458]</p>\n<p>The trick is that the bidder is not marked&nbsp;as a bot in the training csv....</p>\n<p>However, this is just our&nbsp;common sense. The&nbsp;auction experts would have their considerations.</p>\n<p>[/quote]</p>\n<p>But that's the thing, it has been mentioned that many of the outcomes&nbsp;were hand labelled&nbsp;and some were stats based. (Implying that the stats alone missed many bots and hand labeling doesn't sound very scale-able or thorough to me). In my opinion mis-classifications have been made.&nbsp;</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 80472,
      "author_name": "sushanttripathy",
      "author_url": "",
      "post_date": "05/30/2015 19:05:36",
      "content": "<p>Oh dear Lord! What's with the down-votes, that's a valid question to ask in my opinion! :D And none of the answers really help with establishing solution features/models etc.&nbsp;</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 80473,
      "author_name": "abhishekbarnwal",
      "author_url": "",
      "post_date": "05/30/2015 19:08:03",
      "content": "<p>I think I understand why.&nbsp;This&nbsp;is definitely&nbsp;a valid question to think about, but perhaps&nbsp;not in public. Like many others have said before, the data is noisy, and how we deal with it is part of the challenge.&nbsp;</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 80474,
      "author_name": "sushanttripathy",
      "author_url": "",
      "post_date": "05/30/2015 19:20:13",
      "content": "<p>Alright then! :)</p>",
      "votes": null,
      "replies": []
    }
  ],
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    "80423": "",
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}