Philosophy:Sex differences in humans

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Sex differences in humans have been studied in a variety of fields. In humans, biological sex is determined by five factors present at birth: the presence or absence of a Y chromosome, the type of gonads, the sex hormones, the internal reproductive anatomy (such as the uterus), and the external genitalia.[1] Genetic sex is determined solely by the presence or absence of a Y chromosome. A child's presumed sex is determined at birth by observation of the external genitalia.

Sex differences generally refer to traits that are sexually dimorphic. A subset of such differences is hypothesized to be a product of the evolutionary process of sexual selection.[2][3]

Medicine

Main page: Medicine:Sex differences in medicine

Sex differences in medicine include sex-specific diseases, which are diseases that occur only in people of one sex; and sex-related diseases, which are diseases that are more usual to one sex, or which manifest differently in each sex. For example, certain autoimmune diseases may occur predominantly in one sex, for unknown reasons. 90% of primary biliary cirrhosis cases are women, whereas primary sclerosing cholangitis is more common in men. Gender-based medicine, also called "gender medicine", is the field of medicine that studies the biological and physiological differences between the human sexes and how that affects differences in disease. Traditionally, medical research has mostly been conducted using the male body as the basis for clinical studies. Similar findings are also reported in the sport medicine literature where males typically account for >60% of the individuals studied.[4] The findings of these studies have often been applied across the sexes and healthcare providers have assumed a uniform approach in treating both male and female patients. More recently, medical research has started to understand the importance of taking the sex into account as the symptoms and responses to medical treatment may be very different between sexes.[5]

Neither concept should be confused with sexually transmitted diseases, which are diseases that have a significant probability of transmission through sexual contact.

Sex-related illnesses have various causes:[citation needed]

  • Sex-linked genetic illnesses
  • Parts of the reproductive system that are specific to one sex
  • Social causes that relate to the gender role expected of that sex in a particular society.
  • Different levels of prevention, reporting, diagnosis or treatment in each gender.

Research has found that female doctors may be providing better care than male doctors in the U.S.[6] and also in Canada.[7]

Physiology

Sex differences in human physiology are distinctions of physiological characteristics associated with either male or female humans. These can be of several types, including direct and indirect. Direct being the direct result of differences prescribed by the Y-chromosome, and indirect being a characteristic influenced indirectly (e.g., hormonally) by the Y-chromosome. Sexual dimorphism is a term for the phenotypic difference between males and females of the same species.

Direct sex differences follow a bimodal distribution. Through the process of meiosis and fertilization (with rare exceptions), each individual is created with zero or one Y-chromosome. The complementary result for the X-chromosome follows, either a double or a single X. Therefore, direct sex differences are usually binary in expression (although the deviations in complex biological processes produce a menagerie of exceptions). These include, most conspicuously, male (vs female) gonads.

Indirect sex differences are general differences as quantified by empirical data and statistical analysis. Most differing characteristics will conform to a bell-curve (i.e., normal) distribution which can be broadly described by the mean (peak distribution) and standard deviation (indicator of size of range). Often only the mean or mean difference between sexes is given. This may or may not preclude overlap in distributions. For example, most males are taller and stronger than females,[8] but an individual female could be taller and stronger than an individual male. The extents of these differences vary across societies.[9]

The most obvious differences between males and females include all the features related to reproductive role, notably the endocrine (hormonal) systems and their physiological and behavioral effects, including gonadal differentiation, internal and external genital and breast differentiation, and differentiation of muscle mass, height, and hair distribution. There are also differences in the structure of specific areas of the brain. For example, on average, the SDN (INAH3 in humans) has been repeatedly found to be considerably larger in males than in females.[10]

Psychology

Research on biological sex differences in human psychology investigates cognitive and behavioral differences between men and women. This research employs experimental tests of cognition, which take a variety of forms. Tests focus on possible differences in areas such as IQ, spatial reasoning, aggression, emotion, and brain structure and function.

Chromosomal make up is important in human psychology. Women have two X chromosomes while males have an X and Y chromosomal structure. The X chromosome is much more active than Y and it affects behavior.[11] Genetic researchers theorize that the X chromosome may contain a gene responsible for sociability.[12][better source needed]

Most IQ tests are constructed so that there are no overall score differences between females and males. Areas where differences have been found include verbal and mathematical ability.[13][14] IQ tests that measure fluid g and have not been constructed to eliminate sex differences also tend to show that sex differences are either non-existent or negligible.[14][15] 2008 research found that, for grades 2 to 11, there were no significant gender differences in math skills among the general population.[16] Differences in variability of IQ scores have been observed in studies, with more men falling at the extremes of the spectrum.[17][18]

Because social and environmental factors affect brain activity and behavior, where differences are found, it can be difficult for researchers to assess whether or not the differences are innate. Studies on this topic explore the possibility of social influences on how both sexes perform in cognitive and behavioral tests. Stereotypes about differences between men and women have been shown to affect a person's behavior (this is called stereotype threat).[19][20]

In his book titled Gender, Nature, and Nurture, psychologist Richard Lippa found that there were large differences in women's and men's preferences for realistic occupations (for example, mechanic or carpenters) and moderate differences in their preferences for social and artistic occupations. His results also found that women tend to be more people-oriented and men more thing-oriented.[21]

Hartung & Widiger (1998) found that many kinds of mental illnesses and behavioral problems show gender differences in prevalence and incidence. "Of the 80 disorders diagnosed in adulthood for which sex ratios are provided, 35 are said to be more common in men than in women (17 of which are substance related or a paraphilia), 31 are said to be more common in women than men, and 14 are said to be equally common in both sexes."[22]

Differences in male and female jealousy can also be observed. While female jealousy is more likely to be inspired by emotional infidelity, male jealousy is most likely to be brought on by sexual infidelity. A clear majority of approximately 62% to 86% of women reported that they would be more bothered by emotional infidelity and 47% to 60% of men reported that they would be more bothered by sexual infidelity.[23]

In 2005, Janet Shibley Hyde from the University of Wisconsin-Madison introduced the gender similarities hypothesis, which suggests that males and females are similar on most, but not all, psychological variables. The research focused on cognitive variables (for example, reading comprehension, mathematics), communication (for example, talkativeness, facial expressions), social and personality (for example, aggression, sexuality), psychological well-being, and motor behaviors. Using results from a review of 46 meta-analyses, she found that 78% of gender differences were small or close to zero. A few exceptions were some motor behaviors (such as throwing distance) and some aspects of sexuality (such as attitudes about casual sex), which show the largest gender differences. She concludes her article by stating: "It is time to consider the costs of overinflated claims of gender differences. Arguably, they cause harm in numerous realms, including women’s opportunities in the workplace, couple conflict and communication, and analyses of self-esteem problems among adolescents."[24]

Hyde also stated elsewhere that "variations within genders are greater than variations between genders."[25]

In 2012 Irina Trofimova[26] reported “middle age – middle sex” phenomenon and suggested that the significant female advantage in verbal fluency and male advantage in physical power fade after age 25 in an asymmetric manner. She pointed out to several other studies on humans and other primates showing a levelling of sex differences in sociability and physical strength. Males and females might indeed have different timings of maturation of physical and verbal systems: according to McGuinness and Pribram (1978) during the first two years of life talking and walking rarely occur simultaneously, which suggests that these two abilities compete for the same set of neural connections, or that one type of neural organization inhibits the other. This coincides with the higher mobility of boys, accompanied by their lower rates of speech development in childhood, in comparison to girls. These different timings in maturation appear as sex differences in early age, and likely level off in later adulthood (Barbu, Cabanes, & Le Maner-Idrissi, 2011). This middle age – middle sex phenomenon might explain why meta-analytic reports and several experimental studies of verbal abilities and dominance using adult participants reported no sex differences.

Sociology

Crime

Statistics have been consistent in reporting that men commit more criminal acts than women.[27][28] Self-reported delinquent acts are also higher for men than women across many different actions.[29] Many professionals have offered explanations for this sex difference. Some differing explanations include men's evolutionary tendency toward risk and violent behavior, sex differences in activity, social support, and gender inequality.

Despite the difficulty of interpreting them, crime statistics may provide a way to investigate such a relationship from a gender differences perspective. An observable difference in crime rates between men and women might be due to social and cultural factors, crimes going unreported, or to biological factors (for example, testosterone or sociobiological theories). Taking the nature of the crime itself into consideration may also be a factor. Crime can be measured by such data as arrest records, imprisonment rates, and surveys. However, not all crimes are reported or investigated. Moreover, some studies show that men can have an overwhelming bias against reporting themselves to be the victims of a crime (particularly when victimized by a woman), and some studies have argued that men reporting intimate partner violence find disadvantageous biases in law enforcement.[30][31][32] Burton et al. (1998) found that low levels of self control are associated with criminal activity.[33]

Education

A world map showing countries by gender education disparity, 2010.

Sometimes and in some places, there are sex differences in educational achievement. This may be caused by sex discrimination in law or culture, or may reflect natural differences in the interests of the sexes.[34]

Leadership

Main page: Social:Sex differences in leadership

Research has been undertaken to examine whether or not there are sex differences in leadership. Until recently, leadership positions have predominantly been held by men. Women were rarely seen in senior leadership positions leading to a lack of data on how they behave in such positions.[35] The two main lines of research contradict one another, the first being that there are significant sex differences in leadership and the second being that gender does not have an effect on leadership.

Women and men have been surveyed by Gallup each year concerning workplace topics, and when questioned about preferences of a female boss or a male boss, women chose a preference for a male boss 39% of the time, compared to 26% of men displaying preference for a male boss. Only 27% of females would prefer a boss of the same gender.[36] This preference, among both sexes, for male leadership in the workplace has continued unabated for sixty years, according to the survey results.

Religion

Sex differences in religion can be classified as either "internal" or "external." Internal religious issues are studied from the perspective of a given religion, and might include religious beliefs and practices about the roles and rights of men and women in government, education and worship; beliefs about the sex or gender of deities and religious figures; and beliefs about the origin and meaning of human gender. External religious issues can be broadly defined as an examination of a given religion from an outsider's perspective, including possible clashes between religious leaders and laity;[37] and the influence of, and differences between, religious perspectives on social issues. For example, various religious perspectives have either endorsed or condemned alternative family structures, homosexual relationships, and abortion.[38] External religious issues can also be examined from the "lens of gender" perspective embraced by some in feminism or critical theory and its offshoots.

Social capital

Main page: Philosophy:Sex differences in social capital

Sex differences in social capital are differences between men and women in their ability to coordinate actions and achieve their aims through trust, norms and networks.[39] Social capital is often seen as the missing link in development; as social networks facilitate access to resources and protect the commons, while cooperation makes markets work more efficiently.[40] Social capital has been thought of as women's capital as whereas there are gendered barriers to accessing economic capital, women's role in family, and community ensures that they have strong networks. There is potential that the concept can help to bring women's unpaid 'community and household labor',[41] vital to survival and development, to the attention of economists. However, research analyzing social capital from a gendered perspective is rare, and the notable exceptions are very critical.[42][43][44]

Suicide

Sex differences in suicide have been shown to be significant; there are highly asymmetric rates of attempted and completed suicide between males and females.[45] The gap, also called the gender paradox of suicidal behavior, can vary significantly between different countries.[46] Statistics indicate that males die much more often by means of suicide than do females, however reported suicide attempts are 3 times more common among females than males.[47] This paradox is partially explained by the methodology, with females more often choosing medication-induced overdosage, and males more often turning to weapons such as firearms or knives.[48]

Financial risk-taking

Sex differences in financial decision making are relevant and significant. Numerous studies have found that women tend to be financially more risk-averse than men and hold safer portfolios.[49][50] A May 3, 2015 article in the Wall Street Journal by Georgette Jasen reported that "when it comes to investing, men sometimes have their way of doing things, and women have different ways."[51] Scholarly research has documented systematic differences in financial decisions such as buying investments versus insurance, donating to ingroups versus outgroups (such as terrorism victims in Iraq versus USA), spending in stores,[52] and the endowment effect-or asking price for goods people have.[53] The majority of these studies are based on the theory of agency-communion developed by David Bakan in 1966;[54] according to this theory, due to factors such as socialization, males are typically more agentic (focus on self, upside potential, aggressiveness) and females typically more communal (focus on others, downside potential, and nurturing). This framework robustly explains many financial decision making outcomes.

See also

References

  1. ↑ Knox, David; Schacht, Caroline. Choices in Relationships: An Introduction to Marriage and the Family. 11 ed. Cengage Learning; 2011-10-10 [cited 17 June 2013]. ISBN:9781111833220. p. 64–66.
  2. ↑ Mealey, L. (2000). Sex differences. NY: Academic Press.
  3. ↑ Geary, D. C. (2009) Male, Female: The Evolution of Human Sex Differences. Washington, D.C.: American Psychological Association
  4. ↑ Costello, Joseph T.; Bieuzen, Francois; Bleakley, Chris M. (2014-01-01). "Where are all the female participants in Sports and Exercise Medicine research?". European Journal of Sport Science 14 (8): 847–851. doi:10.1080/17461391.2014.911354. ISSN 1536-7290. PMID 24766579. 
  5. ↑ Cuozzo, Karen; Bratman, Steven (reviewer) (September 2005). "Women, Men, and Medicine: We're Not Equal". EBSCO Publishing. Archived from the original on July 10, 2006. https://web.archive.org/web/20060710061518/http://www.columbia-stmarys.org/19301.cfm. 
  6. ↑ Tsugawa, Yusuke; Jena, Anupam B.; Figueroa, Jose F.; Orav, E. John; Blumenthal, Daniel M.; Jha, Ashish K. (2017-02-01). "Comparison of Hospital Mortality and Readmission Rates for Medicare Patients Treated by Male vs Female Physicians" (in en). JAMA Internal Medicine 177 (2): 206. doi:10.1001/jamainternmed.2016.7875. ISSN 2168-6106. PMID 27992617. PMC 5558155. https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2593255. 
  7. ↑ Wallis, Christopher JD; Ravi, Bheeshma; Coburn, Natalie; Nam, Robert K.; Detsky, Allan S.; Satkunasivam, Raj (2017-10-10). "Comparison of postoperative outcomes among patients treated by male and female surgeons: a population based matched cohort study" (in en). BMJ 359: j4366. doi:10.1136/bmj.j4366. ISSN 0959-8138. PMID 29018008. http://www.bmj.com/content/359/bmj.j4366. 
  8. ↑ "Human size evolution: no allometric relationship between male and female stature". Journal of Human Evolution 47 (4): 253–266. 2004. doi:10.1016/j.jhevol.2004.07.004. PMID 15454336. 
  9. ↑ Birke, Lydia. The Gender and Science Reader ed. Muriel Lederman and Ingrid Bartsch. New York, Routledge, 2001. 306-322
  10. ↑ Savic, Ivanka; Garcia-Falgueras, Alicia; Swaab, Dick F. (2010-01-01). "Sexual differentiation of the human brain in relation to gender identity and sexual orientation". Progress in Brain Research. Progress in Brain Research 186: 41–62. doi:10.1016/B978-0-444-53630-3.00004-X. ISBN 9780444536303. ISSN 1875-7855. PMID 21094885. 
  11. ↑ Tanoyouye, Elyse (June 28, 1996). "Heredity Theory Says Intelligence in Males is 'Like Mother, Like Son'". Wall Street Journal: B1. 
  12. ↑ Langreth, Robert (1997). "Hey guys, for your next party, try borrowing women's genes". Wall Street Journal. https://www.wsj.com/articles/SB866070665214215000. 
  13. ↑ Neisser, U.; Boodoo, G.; Bouchard, T. J., J.; Boykin, A. W.; Brody, N.; Ceci, S. J.; Halpern, D. F.; Loehlin, J. C. et al. (1996). "Intelligence: Knowns and unknowns". American Psychologist 51 (2): 77–101. doi:10.1037/0003-066X.51.2.77. 
  14. ↑ 14.0 14.1 Nisbett, R. E.; Aronson, J.; Blair, C.; Dickens, W.; Flynn, J.; Halpern, D. F.; Turkheimer, E. (2012). "Intelligence: New findings and theoretical developments". American Psychologist 67 (2): 130–159. doi:10.1037/a0026699. PMID 22233090. 
  15. ↑ Colom, R.; Juan-Espinosa, M.; Abad, F.; Garcı́a, L. ́S. F. (2000). "Negligible Sex Differences in General Intelligence". Intelligence 28: 57–68. doi:10.1016/S0160-2896(99)00035-5. 
  16. ↑ Hyde, J. S.; Lindberg, S. M.; Linn, M. C.; Ellis, A. B.; Williams, C. C. (July 2008). "DIVERSITY: Gender Similarities Characterize Math Performance". Science 321 (5888): 494–495. doi:10.1126/science.1160364. PMID 18653867. 
  17. ↑ Machin, S.; Pekkarinen, T. (2008). "Global Sex Differences in Test Score Variability". Science 322 (5906): 1331–2. doi:10.1126/science.1162573. PMID 19039123. http://www.sciencemag.org/cgi/content/summary/322/5906/1331. 
  18. ↑ Hedges, Larry V.; Nowell, Amy (1995). "Sex Differences in Mental Test Scores, Variability, and Numbers of High-Scoring Individuals". Science 269 (5220): 41–45. doi:10.1126/science.7604277. PMID 7604277. Bibcode: 1995Sci...269...41H. 
  19. ↑ Fine, Cordelia (2010). Delusions of Gender: How Our Minds, Society, and Neurosexism Create Difference. W. W. Norton. ISBN 0-393-06838-2. 
  20. ↑ Ann M. Gallagher, James C. Kaufman, Gender differences in mathematics: an integrative psychological approach, Cambridge University Press, 2005, ISBN:0-521-82605-5, ISBN:978-0-521-82605-1
  21. ↑ Lippa, Richard A. (2005). Gender, nature, and nurture (2. ed.). Mahwah, NJ [u.a.]: Erlbaum. pp. 12–44. ISBN 0-8058-5344-8. 
  22. ↑ Hartung, CM; Widiger, TA (May 1998). "Gender differences in the diagnosis of mental disorders: conclusions and controversies of the DSM-IV.". Psychological Bulletin 123 (3): 260–78. doi:10.1037/0033-2909.123.3.260. PMID 9602559. 
  23. ↑ Pietrzak, Laird, Stevens, Thompson, Robert, James, David, Nicholas (March 2002). "Sex differences in human jealousy: A coordinated study of forced-choice, continuous rating-scale, and physiological responses on the same subjects". Evolution and Human Behavior 23 (2): 83–94. doi:10.1016/s1090-5138(01)00078-2. http://resolver.scholarsportal.info/resolve/10905138/v23i0002/83_sdihj. Retrieved 21 March 2013. 
  24. ↑ Hyde, Janet Shibley (September 2005). "The Gender Similarities Hypothesis". American Psychologist 60 (6): 581–592. doi:10.1037/0003-066X.60.6.581. PMID 16173891. 
  25. ↑ Tugend, Alina. "Engendering Sons". California (Winter 2014): 50. http://alumni.berkeley.edu/california-magazine/winter-2014-gender-assumptions. 
  26. ↑ Trofimova, Irina (2012). "A study of the dynamics of sex differences in adulthood.". International Journal of Psychology 47: 47, 1–7. 
  27. ↑ Eamonn Carrabine, Paul Iganski, Maggy Lee (2004). Criminology: A Sociological Introduction. Psychology Press. p. 88. ISBN 0415281679. https://books.google.com/books?id=CJm4AIc4sZEC&pg=PA88. Retrieved August 7, 2016. "Statistics repeatedly show that many more men than women commit crimes. Indeed, as Richard Collier notes, 'most crimes would remain unimaginable without the presence of men (Collier, 1998; see also Jefferson, 2002)." 
  28. ↑ Jeffery T. Walker, Sean Maddan (2013). Understanding Statistics for the Social Sciences, Criminal Justice, and Criminology. Jones & Bartlett Publishers. p. 99. ISBN 1449634036. https://books.google.com/books?id=0lps6gtg350C&pg=PA99. Retrieved August 7, 2016. "[...] it is well supported in research that more men than women commit crimes." 
  29. ↑ Rowe, David; Vazsonyi, Alexander; Flannery, Daniel (1995). "Sex Differences in Crime: Do Means and Within-Sex Variation Have Similar Causes?". Journal of Research in Crime and Delinquency 32: 84–100. doi:10.1177/0022427895032001004. http://jrc.sagepub.com/content/32/1/84.full.pdf. 
  30. ↑ "[M]en who are involved in disputes with their partners, whether as alleged victims or as alleged offenders or both, are disadvantaged and treated less favorably than women by the law-enforcement system at almost every step." Brown, G. (2004). Gender as a factor in the response of the law-enforcement system to violence against partners. Sexuality and Culture, 8, (3-4), 3-139.
  31. ↑ Felson, R. B.; Pare, P. (2005). "The reporting of domestic violence and sexual assault by nonstrangers to the police". Journal of Marriage and Family 67 (3): 597–610. doi:10.1111/j.1741-3737.2005.00156.x. 
  32. ↑ Felson, R. B. (2008). The legal consequences of intimate partner violence for men and women. Children and Youth Services Review, 30, 639-646.
  33. ↑ Burton, Velmer; Cullen, Francis; Evans, David; Alarid, Leanne Fiftal; Dunaway, R. Gregory (1998). "Gender, Self-Control, and Crime". Journal of Research in Crime and Delinquency 35 (2): 123–147. doi:10.1177/0022427898035002001. 
  34. ↑ Pearson, Jennifer. "Gender, Education and." Blackwell Encyclopedia of Sociology. Ritzer, George (ed). Blackwell Publishing, 2007. Blackwell Reference Online. 31 March 2008 <http://www.blackwellreference.com/subscriber/tocnode?id=g9781405124331_chunk_g978140512433113_ss1-16>
  35. ↑ as cited in Andersen, J. A.; Hansson, P. H. (2011). "At the end of the road? On differences between women and men in leadership behavior". Leadership and Organization Development Journal 32 (5): 428–441. doi:10.1108/01437731111146550. 
  36. ↑ Women Prefer Male Bosses Even More Than Men Do Bloomberg, October 16, 2014
  37. ↑ Juschka, Darlene. "Gender." In ed. J. Hinnels. The Routledge Companion to the Study of Religion. 2nd ed. New York: Routledge, 2010:245-258.
  38. ↑ 'Unborn Child Protection Bill', State Parliament of New South Wales, 2006.
  39. ↑ Laurie, Nina; Andolina, Robert; and Radcliffe, Sarah (2005) 'Ethnodevelopment: Social Movements, Creating Experts and Professionalising Indigenous Knowledge in Ecuador' Antipode 37(3): 470-496
  40. ↑ Putnam, Robert. (1993) Making Democracy Work. Civic Traditions in Modern Italy. Princeton University Press.
  41. ↑ Moser, Caroline (1993) Gender Planning and Development: Theory, Practice and Training London and New York: Routledge
  42. ↑ MacLean, Kate (2010-06-25). "Molyneux, Maxine (2002) Gender and the Silences of Social Capital: Lessons from Latin America Development and Change 33 (2):167-188". Development and Change (Onlinelibrary.wiley.com) 41 (3): 495. doi:10.1111/j.1467-7660.2010.01649.x. http://onlinelibrary.wiley.com/doi/10.1111/j.1467-7660.2010.01649.x/abstract. Retrieved 2014-01-15. 
  43. ↑ MacLean, Kate (2010-06-25). "Maclean, Kate (2010) 'Capitalising on Women's Social Capital? Women-targeted Microfinance in Bolivia' Development and Change 41 (3) pp 495-515". Development and Change (Onlinelibrary.wiley.com) 41 (3): 495. doi:10.1111/j.1467-7660.2010.01649.x. http://onlinelibrary.wiley.com/doi/10.1111/j.1467-7660.2010.01649.x/abstract. Retrieved 2014-01-15. 
  44. ↑ "Wayback Machine". 8 October 2011. Archived from the original on 8 October 2011. https://web.archive.org/web/20111008055724/http://zunia.org/uploads/media/knowledge/Critique%20of%20Microfinance.pdf. 
  45. ↑ Udry, J. Richard (November 1994). "The Nature of Gender". Demography 31 (4): 561–573. doi:10.2307/2061790. PMID 7890091. Archived from the original on 2013-04-03. https://web.archive.org/web/20130403142805/http://www.northeastern.edu/womensstudies/graduate/courses/course_material/men_women_social/documents/Udry_Nature_of_Gender.pdf. 
  46. ↑ Canetto, Silvia (1998). "The Gender Paradox in Suicide". Suicide and Life Threatening Behavior 28 (1): 1–23. doi:10.1111/j.1943-278X.1998.tb00622.x. PMID 9560163. 
  47. ↑ "Suicide Statistics at Suicide.org". Suicide prevention, awareness, and support. Suicide.org. 2005. 
  48. ↑ Moscicki, Eve K. (6 September 1993). "Gender Differences in Completed and Attempted Suicide". National Institute of Mental Health. 
  49. ↑ Bajtelsmit, Vickie L; Bernasek, Alexandra (1996). "Why Do Women Invest Differently Than Men?". Journal of Financial Counseling and Planning 7: 1–10. 
  50. ↑ Adhikari, Binay K; O'Leary, Virginia E (2011). "Gender Differences in Risk Aversion: A Developing Nation’s Case". Journal of Personal Finance 10 (2): 122–147. https://www.dropbox.com/s/ehk7iwzukwu0kw4/Gender%20Differences%20Risk%20Aversion%20-%20Nepal.pdf?dl=0. 
  51. ↑ Georgette Jasen, May 3, 2015, WSJ online. https://www.wsj.com/articles/male-investors-vs-female-investors-how-do-they-compare-1430709406
  52. ↑ Kurt, Didem; Inman, J. Jeffrey; Argo, Jennifer J. (2011). "The influence of friends on consumer spending: The role of agency-communion orientation and self-monitoring". Journal of Marketing Research 48 (4): 741–754. doi:10.1509/jmkr.48.4.741. 
  53. ↑ Dommer, Sara Loughran; Swaminathan, Vanitha (2013). "Explaining the endowment effect through ownership: The role of identity, gender, and self-threat". Journal of Consumer Research 39 (5): 1034–1050. doi:10.1086/666737. 
  54. ↑ Bakan, David. "The duality of human existence: An essay on psychology and religion." (1966).

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