Funding for this research was provided by:
Economic and Social Research Council (ES/M000931/1)
Leverhulme Trust (ECF-2015-612)
Text and Data Mining valid from 2018-07-01
First Online: 5 September 2018
Compliance with Ethical Standards
: The authors declare no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.