Growth of bioscience preprints in 2015

preprints.ipynb

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   "source": [
    "# Growth of bioscience preprints in 2015\n",
    "\n",
    "By Daniel Himmelstein ([@dhimmel](https://twitter.com/dhimmel))"
   ]
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   "source": [
    "import datetime"
   ]
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   "source": [
    "*PeerJ* [started](https://peerj.com/blog/post/47030855181/peerj-preprints-a-new-preprint-server-for-the-biological-and-medical-sciences/) accepting preprints on April 3, 2013. *bioRxiv* [opened on](http://news.sciencemag.org/biology/2013/11/new-preprint-server-aims-be-biologists-answer-physicists-arxiv) November 11, 2013. [Click here](https://doi.org/10.1038/503180a) to read more about the beginnings."
   ]
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   "source": [
    "start_dates = {\n",
    "    'PeerJ': datetime.date(2013, 4, 3),\n",
    "    'bioRxiv': datetime.date(2013, 11, 11),\n",
    "}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
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   "outputs": [],
   "source": [
    "articles_before_2015 = {\n",
    "    'PeerJ': 772,\n",
    "    'bioRxiv': 996,\n",
    "}\n",
    "\n",
    "articles_in_2015 = {\n",
    "    'PeerJ': 1622 - 772,\n",
    "    'bioRxiv': 1776,\n",
    "}"
   ]
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   "source": [
    "apd_before_2015, apd_in_2015, growth = {}, {}, {}\n",
    "for repo in 'PeerJ', 'bioRxiv':\n",
    "    # compute average articles per day prior to 2015\n",
    "    start_date = start_dates[repo]\n",
    "    days_before_2015 = (datetime.date(2015, 1, 1) - start_date).days\n",
    "    apd_before_2015[repo] = articles_before_2015[repo] / days_before_2015\n",
    "    # compute average articles per day in 2015\n",
    "    apd_in_2015[repo] = articles_in_2015[repo] / 365\n",
    "    # compute percent increase in articles per day in 2015 compared to before 2015\n",
    "    growth[repo] = 100 * (apd_in_2015[repo] - apd_before_2015[repo]) / apd_before_2015[repo]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'PeerJ': 1.2100313479623825, 'bioRxiv': 2.394230769230769}"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# average articles per day prior to 2015\n",
    "apd_before_2015"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": false
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'PeerJ': 2.328767123287671, 'bioRxiv': 4.865753424657535}"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# average articles per day in 2015\n",
    "apd_in_2015"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {
    "collapsed": false
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'PeerJ': 92.45510682092412, 'bioRxiv': 103.22825548770427}"
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# percent increase in articles per day in 2015 compared to before 2015\n",
    "growth"
   ]
  }
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