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{"title"=>"Second-to-Fourth Digit Ratio Has a Non-Monotonic Impact on Altruism", "type"=>"journal", "authors"=>[{"first_name"=>"Pablo", "last_name"=>"Brañas-Garza", "scopus_author_id"=>"18036907700"}, {"first_name"=>"Jaromír", "last_name"=>"Kovářík", "scopus_author_id"=>"22951393600"}, {"first_name"=>"Levent", "last_name"=>"Neyse", "scopus_author_id"=>"55647279000"}], "year"=>2013, "source"=>"PLoS ONE", "identifiers"=>{"issn"=>"19326203", "scopus"=>"2-s2.0-84876019994", "sgr"=>"84876019994", "pui"=>"368705926", "isbn"=>"1932-6203 (Electronic)\\n1932-6203 (Linking)", "pmid"=>"23593214", "doi"=>"10.1371/journal.pone.0060419"}, "id"=>"6097fbff-42d8-31df-a5a2-f936976e4497", "abstract"=>"Gene-culture co-evolution emphasizes the joint role of culture and genes for the emergence of altruistic and cooperative behaviors and behavioral genetics provides estimates of their relative importance. However, these approaches cannot assess which biological traits determine altruism or how. We analyze the association between altruism in adults and the exposure to prenatal sex hormones, using the second-to-fourth digit ratio. We find an inverted U-shaped relation for left and right hands, which is very consistent for men and less systematic for women. Subjects with both high and low digit ratios give less than individuals with intermediate digit ratios. We repeat the exercise with the same subjects seven months later and find a similar association, even though subjects' behavior differs the second time they play the game. We then construct proxies of the median digit ratio in the population (using more than 1000 different subjects), show that subjects' altruism decreases with the distance of their ratio to these proxies. These results provide direct evidence that prenatal events contribute to the variation of altruistic behavior and that the exposure to fetal hormones is one of the relevant biological factors. In addition, the findings suggest that there might be an optimal level of exposure to these hormones from social perspective.", "link"=>"http://www.mendeley.com/research/secondtofourth-digit-ratio-nonmonotonic-impact-altruism", "reader_count"=>28, "reader_count_by_academic_status"=>{"Unspecified"=>1, "Professor > Associate Professor"=>3, "Researcher"=>5, "Student > Ph. D. Student"=>8, "Student > Postgraduate"=>4, "Student > Master"=>3, "Student > Bachelor"=>3, "Lecturer"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>1, "Professor > Associate Professor"=>3, "Researcher"=>5, "Student > Ph. D. Student"=>8, "Student > Postgraduate"=>4, "Student > Master"=>3, "Student > Bachelor"=>3, "Lecturer"=>1}, "reader_count_by_subject_area"=>{"Unspecified"=>5, "Agricultural and Biological Sciences"=>5, "Psychology"=>10, "Economics, Econometrics and Finance"=>8}, "reader_count_by_subdiscipline"=>{"Psychology"=>{"Psychology"=>10}, "Economics, Econometrics and Finance"=>{"Economics, Econometrics and Finance"=>8}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>5}, "Unspecified"=>{"Unspecified"=>5}}, "reader_count_by_country"=>{"Austria"=>2, "Russia"=>1}, "group_count"=>3}

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• http://doi.org/10.3389/fnbeh.2018.00022
• http://doi.org/10.1111/iere.12299
• http://doi.org/10.1007/s40881-019-00076-y
• http://doi.org/10.1371/journal.pone.0212767
• http://doi.org/10.1017/nws.2017.4
• http://doi.org/10.3389/fnbeh.2017.00249
• http://doi.org/10.3389/fnbeh.2017.00254
• http://doi.org/10.1016/j.lindif.2014.10.001
• http://doi.org/10.1038/s41598-017-05638-w
• http://doi.org/10.1016/j.socec.2017.11.007
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• http://doi.org/10.1016/j.socec.2017.05.003
• http://doi.org/10.1002/ajhb.22639
• http://doi.org/10.3389/fnbeh.2015.00041
• http://doi.org/10.1016/j.euroecorev.2017.09.015
• http://doi.org/10.1016/j.socec.2018.01.004
• http://doi.org/10.1371/journal.pone.0103332
• http://doi.org/10.1016/j.sumpsi.2017.06.003
• http://doi.org/10.1371/journal.pone.0176199
• http://doi.org/10.1371/journal.pone.0079539
• http://doi.org/10.3389/fnbeh.2018.00005
• http://doi.org/10.3389/fnbeh.2018.00009
• http://doi.org/10.1016/j.mce.2017.08.008
• http://doi.org/10.3389/fnbeh.2015.00088
• http://doi.org/10.1007/s10508-015-0535-z
• http://doi.org/10.2139/ssrn.2727108
• http://doi.org/10.3389/fnbeh.2017.00257
• http://doi.org/10.1016/j.evolhumbehav.2018.09.002
• http://doi.org/10.1098/rsbl.2019.0185
• http://doi.org/10.1111/etap.12165
• http://doi.org/10.3389/fnbeh.2016.00243
• http://doi.org/10.1371/journal.pone.0212167
• http://doi.org/10.1016/j.jbusres.2019.02.034
• http://doi.org/10.1016/j.socec.2015.09.002
• http://doi.org/10.3389/fnbeh.2017.00250

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• {"id"=>"322138907397459968", "text"=>"2D:4Dが利他性と逆U字型の曲線を描く。Second-to-Fourth Digit Ratio Has a Non-Monotonic Impact on Altruism http://t.co/9lT1ZuVnbp", "created_at"=>"2013-04-11T00:07:55Z", "user"=>"uranus_2", "user_name"=>"マーキュリー２世", "user_profile_image"=>"http://a0.twimg.com/sticky/default_profile_images/default_profile_5_normal.png"}
• {"id"=>"532600989866795009", "text"=>"@LSEBehavioural For those who could not attend to this event:\n\nhttp://t.co/hsjqAIYrvY\nhttp://t.co/X96n3x7GTU\nhttp://t.co/XDUjCk5hvQ", "created_at"=>"2014-11-12T18:29:05Z", "user"=>"LeventNeyse", "user_name"=>"Levent Neyse", "user_profile_image"=>"http://pbs.twimg.com/profile_images/445238251322757120/QniOAv5v_normal.jpeg"}
• {"id"=>"532601589480300544", "text"=>"@LSEBehavioural For those who could not attend \n\nhttp://t.co/hsjqAIYrvY\nhttp://t.co/X96n3x7GTU\nhttp://t.co/XDUjCk5hvQ", "created_at"=>"2014-11-12T18:31:28Z", "user"=>"LeventNeyse", "user_name"=>"Levent Neyse", "user_profile_image"=>"http://pbs.twimg.com/profile_images/445238251322757120/QniOAv5v_normal.jpeg"}
• {"id"=>"532606955651891200", "text"=>"For those who could not attend seminar by @LeventNeyse:\n\nhttp://t.co/Ppk9cRpPw4\nhttp://t.co/fgiGJzPltf\nhttp://t.co/PG4iXjkmGm", "created_at"=>"2014-11-12T18:52:48Z", "user"=>"LSEBehavioural", "user_name"=>"LSE Behavioural", "user_profile_image"=>"http://pbs.twimg.com/profile_images/378800000734876875/e37dca854a29cdd8eb26658e4aff5570_normal.png"}
• {"id"=>"532610642847358976", "text"=>"RT @LSEBehavioural: For those who could not attend seminar by @LeventNeyse:\n\nhttp://t.co/Ppk9cRpPw4\nhttp://t.co/fgiGJzPltf\nhttp://t.co/PG4i…", "created_at"=>"2014-11-12T19:07:27Z", "user"=>"LeventNeyse", "user_name"=>"Levent Neyse", "user_profile_image"=>"http://pbs.twimg.com/profile_images/445238251322757120/QniOAv5v_normal.jpeg"}
• {"id"=>"625410311844155392", "text"=>"Prenatal exposure to testosterone and prosocial behaviour http://t.co/WJqV30tn0I", "created_at"=>"2015-07-26T21:00:12Z", "user"=>"BehSnaps", "user_name"=>"BehaviouralSnapshots", "user_profile_image"=>"http://pbs.twimg.com/profile_images/616996419044556800/6wf_r22c_normal.jpg"}

Wikipedia | Further Information

• {"title"=>"Dictator game", "url"=>"http://en.wikipedia.org/wiki/Dictator_game", "timestamp"=>"2019-02-23T22:23:33Z"}
• {"title"=>"独裁者博弈", "url"=>"http://zh.wikipedia.org/wiki/独裁者博弈", "timestamp"=>"2019-02-23T09:18:31Z"}

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• {"files"=>["https://ndownloader.figshare.com/files/1020791"], "description"=>"<p>Dictator's giving in 2010 (solid), 2011 (dashed) and updating of behavior from 2010 to 2011 (dotted) on -axis and 2D:4D (-axis); censored regression analysis; right hands. Estimated results: (i) 2010: , (ii) 2011: , (iii) 2010–2011: . The reported estimations control for heterogeneity; control variables are held at their averages.</p>", "links"=>[], "tags"=>["diabetes and endocrinology", "Mental health", "physiology", "neuroscience"], "article_id"=>679626, "categories"=>["Chemistry", "Neuroscience", "Physiology", "Mental Health"], "users"=>["Pablo Brañas-Garza", "Jaromír Kovářík", "Levent Neyse"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0060419.g002", "stats"=>{"downloads"=>1, "page_views"=>6, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_estimated_relation_/679626", "title"=>"The estimated relation.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-04-10 02:40:26"}

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Relative Metric

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F1000Prime