{
  "id": 13911,
  "title": "Multiple bids by same bidder",
  "url": "/competitions/facebook-recruiting-iv-human-or-bot/discussion/13911",
  "author_name": "",
  "post_date": "2015-05-01T03:53:42.317Z",
  "votes": null,
  "comment_count": 14,
  "views": 3054,
  "content": "<p>Why would the same bidder have multiple bids in a row for the same auction?</p>",
  "messages": [
    {
      "id": "75853",
      "postDate": "05/01/2015 03:53:42",
      "content": "<p>Why would the same bidder have multiple bids in a row for the same auction?</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "75854",
      "postDate": "05/01/2015 04:07:53",
      "content": "<p>I guess it is because if the person feels like his previous bid is not good enough, he can rebid right ?</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "76222",
      "postDate": "05/03/2015 02:53:37",
      "content": "<p>Yes, that's right. But there are cases in the data where the same bidder submits 15 bids in a row for the same auction without any other intervening bidders.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "76268",
      "postDate": "05/03/2015 08:49:33",
      "content": "<p>Maybe it is like minimal price that is not disclosed. So he bids until he meets the price.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "76324",
      "postDate": "05/03/2015 14:15:36",
      "content": "<p>This is actually explained in the description of the data:</p>\n<p style=\"padding-left: 30px\">The online auction platform has a fixed increment of dollar amount for each bid, so it doesn't include an amount for each bid.</p>\n<p>Thus, it could make sense even for one bidder to bid multiple times in a row, e.g., if the current highest bid is far from what the item is expected to yield in the end.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "76335",
      "postDate": "05/03/2015 15:15:19",
      "content": "<p>I was wondering about this too. &nbsp;For each auction, are we provided the comprehensive set of bids ?</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "76362",
      "postDate": "05/03/2015 16:38:10",
      "content": "<p>[quote=Lorenzo;76324]</p>\n<p>This is actually explained in the description of the data:</p>\n<p style=\"padding-left: 30px\">The online auction platform has a fixed increment of dollar amount for each bid, so it doesn't include an amount for each bid.</p>\n<p>Thus, it could make sense even for one bidder to bid multiple times in a row, e.g., if the current highest bid is far from what the item is expected to yield in the end.</p>\n<p>[/quote]</p>\n<p>so does this means that bidder can not bid more than one dollar at a time. for eg &nbsp;if there is difference of 5 dollar between my highest bid and current highest bid then I have to bid one dollar more than 5 times to become the highest bidder.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "76366",
      "postDate": "05/03/2015 16:51:44",
      "content": "<p>I think it&nbsp;means that each bid increases the price of an item by one dollar, i.e. if I bid now I say that I bid one dollar more than the currently highest bid.&nbsp;</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "76374",
      "postDate": "05/03/2015 17:05:57",
      "content": "<p>I understand now.&nbsp; What it means is that if the current highest bid is $20 and I want to bid $30, I have to place 10 bids, because each bid raises the bid amount by $1 (the numbers are examples only.)</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "76414",
      "postDate": "05/03/2015 20:03:46",
      "content": "<p>Although, if you look at how many bids there are for some auctions then&nbsp;my assumption might be wrong or some items are really expensive. The average price of an item would then be about $508, quite expensive. ;)</p>\n<p>Assume we have&nbsp;two bidders A and B, A starts the bid and he want to bid $30, then B wants to bid one dollar higher, so $31 dollars. Would we then end up with 31 or 61 different bids?</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "76440",
      "postDate": "05/03/2015 21:35:54",
      "content": "<p>31 bids. Bidder A would have 30 bids and bidder B would have 1.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "78014",
      "postDate": "05/12/2015 07:26:55",
      "content": "<p>What is not clear to me is whether the auctions have a fixed ending time or if the ending time is extended when a bid is placed at the last seconds. Some portals do that in order to make sniping unappealing.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "78017",
      "postDate": "05/12/2015 07:52:11",
      "content": "<p>I think understanding the data and make assumptions is part of the competition itself..</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "78018",
      "postDate": "05/12/2015 07:54:07",
      "content": "<p>My assumption is that the ending time is not fixed. It would not make sense (from the game theoretic point of view) that some bots bid like crazy if they could easily snipe the item they want.&nbsp;</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "79718",
      "postDate": "05/22/2015 04:13:35",
      "content": "<p>[quote=thorstenkurth;78014]</p>\n<p>What is not clear to me is whether the auctions have a fixed ending time or if the ending time is extended when a bid is placed at the last seconds. Some portals do that in order to make sniping unappealing.</p>\n<p>[/quote]</p>\n\n<p>My assumption is that the ending time is not fixed.&nbsp;&nbsp; I think of it like Quibids, where the time is reset to 15 seconds after every bid.&nbsp;&nbsp; So every auction is in a constant state of &quot;almost ending&quot;</p>",
      "rawMarkdown": "",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 75854,
      "author_name": "ggorantla",
      "author_url": "",
      "post_date": "05/01/2015 04:07:53",
      "content": "<p>I guess it is because if the person feels like his previous bid is not good enough, he can rebid right ?</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 76222,
      "author_name": "bigr1284185",
      "author_url": "",
      "post_date": "05/03/2015 02:53:37",
      "content": "<p>Yes, that's right. But there are cases in the data where the same bidder submits 15 bids in a row for the same auction without any other intervening bidders.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 76268,
      "author_name": "mpekalski",
      "author_url": "",
      "post_date": "05/03/2015 08:49:33",
      "content": "<p>Maybe it is like minimal price that is not disclosed. So he bids until he meets the price.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 76324,
      "author_name": "lorenzo",
      "author_url": "",
      "post_date": "05/03/2015 14:15:36",
      "content": "<p>This is actually explained in the description of the data:</p>\n<p style=\"padding-left: 30px\">The online auction platform has a fixed increment of dollar amount for each bid, so it doesn't include an amount for each bid.</p>\n<p>Thus, it could make sense even for one bidder to bid multiple times in a row, e.g., if the current highest bid is far from what the item is expected to yield in the end.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 76335,
      "author_name": "rocelot",
      "author_url": "",
      "post_date": "05/03/2015 15:15:19",
      "content": "<p>I was wondering about this too. &nbsp;For each auction, are we provided the comprehensive set of bids ?</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 76362,
      "author_name": "sahildahiya",
      "author_url": "",
      "post_date": "05/03/2015 16:38:10",
      "content": "<p>[quote=Lorenzo;76324]</p>\n<p>This is actually explained in the description of the data:</p>\n<p style=\"padding-left: 30px\">The online auction platform has a fixed increment of dollar amount for each bid, so it doesn't include an amount for each bid.</p>\n<p>Thus, it could make sense even for one bidder to bid multiple times in a row, e.g., if the current highest bid is far from what the item is expected to yield in the end.</p>\n<p>[/quote]</p>\n<p>so does this means that bidder can not bid more than one dollar at a time. for eg &nbsp;if there is difference of 5 dollar between my highest bid and current highest bid then I have to bid one dollar more than 5 times to become the highest bidder.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 76366,
      "author_name": "mpekalski",
      "author_url": "",
      "post_date": "05/03/2015 16:51:44",
      "content": "<p>I think it&nbsp;means that each bid increases the price of an item by one dollar, i.e. if I bid now I say that I bid one dollar more than the currently highest bid.&nbsp;</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 76374,
      "author_name": "bigr1284185",
      "author_url": "",
      "post_date": "05/03/2015 17:05:57",
      "content": "<p>I understand now.&nbsp; What it means is that if the current highest bid is $20 and I want to bid $30, I have to place 10 bids, because each bid raises the bid amount by $1 (the numbers are examples only.)</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 76414,
      "author_name": "mpekalski",
      "author_url": "",
      "post_date": "05/03/2015 20:03:46",
      "content": "<p>Although, if you look at how many bids there are for some auctions then&nbsp;my assumption might be wrong or some items are really expensive. The average price of an item would then be about $508, quite expensive. ;)</p>\n<p>Assume we have&nbsp;two bidders A and B, A starts the bid and he want to bid $30, then B wants to bid one dollar higher, so $31 dollars. Would we then end up with 31 or 61 different bids?</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 76440,
      "author_name": "bigr1284185",
      "author_url": "",
      "post_date": "05/03/2015 21:35:54",
      "content": "<p>31 bids. Bidder A would have 30 bids and bidder B would have 1.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 78014,
      "author_name": "tkurth",
      "author_url": "",
      "post_date": "05/12/2015 07:26:55",
      "content": "<p>What is not clear to me is whether the auctions have a fixed ending time or if the ending time is extended when a bid is placed at the last seconds. Some portals do that in order to make sniping unappealing.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 78017,
      "author_name": "paolovigori",
      "author_url": "",
      "post_date": "05/12/2015 07:52:11",
      "content": "<p>I think understanding the data and make assumptions is part of the competition itself..</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 78018,
      "author_name": "tkurth",
      "author_url": "",
      "post_date": "05/12/2015 07:54:07",
      "content": "<p>My assumption is that the ending time is not fixed. It would not make sense (from the game theoretic point of view) that some bots bid like crazy if they could easily snipe the item they want.&nbsp;</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 79718,
      "author_name": "scottdh",
      "author_url": "",
      "post_date": "05/22/2015 04:13:35",
      "content": "<p>[quote=thorstenkurth;78014]</p>\n<p>What is not clear to me is whether the auctions have a fixed ending time or if the ending time is extended when a bid is placed at the last seconds. Some portals do that in order to make sniping unappealing.</p>\n<p>[/quote]</p>\n\n<p>My assumption is that the ending time is not fixed.&nbsp;&nbsp; I think of it like Quibids, where the time is reset to 15 seconds after every bid.&nbsp;&nbsp; So every auction is in a constant state of &quot;almost ending&quot;</p>",
      "votes": null,
      "replies": []
    }
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