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Using unique large datasets, we investigated the link between these traits and male online gamblers' actual betting participation and intensity.<\/jats:p><\/jats:sec><jats:sec><jats:title>Method<\/jats:title><jats:p>We combined datasets containing online horse betting data (during 2015\u20132016) from the Finnish monopoly betting company, administrative registry data from Statistics Finland, and personality trait measures from the Finnish Defence Forces corresponding to Extraversion and Conscientiousness as defined in the five\u2010factor model. We modelled associations between these traits and betting participation (<jats:italic>n<\/jats:italic>\u00a0=\u00a0471,968) and intensity (<jats:italic>n<\/jats:italic>\u00a0=\u00a011,217) among male horse bettors (age\u00a0=\u00a036\u201353).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Controlling for demographics and IQ, individuals scoring high on Conscientiousness (or Extraversion) were less (or more) likely to bet and less (or more) intensive bettors\u2014even when personality was measured 16\u201334\u00a0years before betting occurred. One <jats:italic>SD<\/jats:italic> personality score increase represented an annual decrease (Conscientiousness) or increase (Extraversion) of \u20ac570\u2013754 in spending.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Extraversion and Conscientiousness are implicated in real\u2010life financial behavior with tangible consequences for individuals. These effects are stronger than for many known demographic variables used in gambling studies and persist up to 34\u00a0years after personality has been measured.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jopy.12637","type":"journal-article","created":{"date-parts":[[2021,4,3]],"date-time":"2021-04-03T15:45:55Z","timestamp":1617464755000},"page":"1081-1094","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Online betting intensity is linked with Extraversion and Conscientiousness"],"prefix":"10.1111","volume":"89","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6063-0926","authenticated-orcid":false,"given":"Jussi","family":"Palom\u00e4ki","sequence":"first","affiliation":[{"name":"Cognitive Science Department of Digital Humanities Faculty of Arts University of Helsinki Helsinki Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Laakasuo","sequence":"additional","affiliation":[{"name":"Cognitive Science Department of Digital Humanities Faculty of Arts University of Helsinki Helsinki Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sari","family":"Castr\u00e9n","sequence":"additional","affiliation":[{"name":"Department of Public Health Solutions Alcohol and Drugs and Addictions Unit Finnish Institute for Health and Welfare Helsinki Finland"},{"name":"Department of Public Health Faculty of Medicine University of Helsinki Helsinki Finland"},{"name":"Faculty of Social Sciences Department of Psychology and Speech\u2010Language Pathology University of Turku Turku Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jani","family":"Saastamoinen","sequence":"additional","affiliation":[{"name":"Business School Joensuu Campus University of Eastern Finland Joensuu Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tuomo","family":"Kainulainen","sequence":"additional","affiliation":[{"name":"Business School Joensuu Campus University of Eastern Finland Joensuu Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Niko","family":"Suhonen","sequence":"additional","affiliation":[{"name":"Business School Joensuu Campus University of Eastern Finland Joensuu Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,5,5]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0027633"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1176\/appi.books.9780890425596"},{"issue":"3","key":"e_1_2_6_4_1","first-page":"73","article-title":"Relationship between Extraversion and gambling tendencies among students in Nyamira south\u2010sub\u2010county, Kenya","volume":"5","author":"Andrew N. 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