Nobel Prize papers citation sentiment

Two sets of papers are distinguished, and both are introduced in this section. The first set are the so-called “Nobel papers”, written by Nobel Prize laureates and thought to be closely connected with the conferral of their respective Nobel Prizes. We narrowed Nobel Prizes to those conferred between 2010 and 2015. This time frame provides a minimum three-year citation window for the oldest (2008) paper in PMC to cite a Nobel paper at the time of data collection. To effectively link a Nobel paper with its citing papers, the Nobel paper should be indexed in PubMed and have a PubMed ID (PMID), but it does not itself need to be included in PMC. After removing those Nobel papers that lack a PMID and those with fewer than 20 citations before their respective Nobel Prize, we included in the final data set 14 papers for Physiology or Medicine (hereafter Medicine) and 11 for Chemistry. The 2018 October version of PMC was used for data collection. In all, these papers received 12,393 citances, of which 4,677 took place before award. The second set contains control-group papers with which to benchmark the sentiment change in the Nobel papers. For each Nobel paper, we selected three control papers that each had a similar citation count to the Nobel paper and were published within two years of the Nobel papers. These selection criteria ensure that the control papers are sufficiently similar to the Nobel papers that the major distinguishing factor is the Nobel Prize. In total, there are 75 papers in the control group, receiving a total of 30,851 citances.