<https://ifp.nyu.edu/2016/journal-article-abstracts/smart-and-illicit-who-becomes-an-entrepreneur-and-do-they-earn-more/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ifp.nyu.edu/2016/journal-article-abstracts/smart-and-illicit-who-becomes-an-entrepreneur-and-do-they-earn-more/>