Cohabitation is an arrangement where people who are not legally married live together as a couple. They are often involved in a romantic or sexually intimate relationship on a long-term or permanent basis. Such arrangements have become increasingly common in Western world since the late 20th century, led by changing social views, especially regarding marriage. The term dates from the mid 16th century, being used with this meaning as early as 1530.
In Europe, the Scandinavia began this trend, although many countries have since followed. Mediterranean Europe has traditionally been very conservative, with religion playing a strong role. Until the mid-1990s, cohabitation levels remained low in this region, but have since increased; for example, in Portugal the majority of children have been born of unwed parents since 2015, constituting 60% of the total in 2021.
In the United States, over the past few decades there has been an increase in unmarried couples cohabiting. Historically, Western countries have been influenced by Christian doctrine on sex, which opposes unmarried cohabitation. As social norms have changed, such beliefs have become less widely held and some Christian denominations view cohabitation as a precursor to marriage. Pope Francis has performed the marriages of cohabiting couples who had children, while former archbishop of Canterbury Rowan Williams and the archbishop of York John Sentamu have expressed tolerance of cohabitation.
In recent decades, high rates of participation of women in the workforce and the widespread availability of highly effective long acting reversible contraceptives has led to women making individual choices over their reproduction with decreased reliance on male partners for financial stability. All these changes favored alternative living arrangements to marriage.
In Central and Eastern Europe, during the late 1980s and early 1990s, there were major political changes, such as the fall of Communist governments. These societies entered a new era of increased social freedom, less rigid rules, and less authoritarian governments. They interacted with Western Europe and some became members of the European Union. As a result, the patterns of family life started to change: marriage rates have declined, and marriage was postponed to a later age. Cohabitation and births to unmarried mothers increased, and in some countries the increase was quick.
The deinstitutionalization of marriage refers to the weakening of the social and legal norms that regulate peoples' behavior in regard to marriage. The rise in cohabitation is part of other major social changes such as higher divorce rate, older age at first marriage and childbearing, and more births outside marriage. Factors such as secularization, increased participation of women in the labor force, changes in the meaning of marriage, risk reduction, individualism, and changing views on sexuality have been cited as contributing to these social changes. There has also been a change in modern sexual ethics, with a focus on consent, rather than marital status (i.e. decriminalization of adultery and fornication; criminalization of marital rape), reflecting new concepts on the role and purpose of sexual interaction, and new conceptualizations of female sexuality and of self-determination. There have been objections against the legal and social regulation of female sexuality; with such regulations being often seen as violations of women's rights. In addition, some individuals may feel that marriage is unnecessary or outdated, leading to couples not formalizing their relation. DRAFT VERSION: Do not cite or quote. For instance, in the European Values Study (EVS) of 2008, the percentage of respondents who agreed with the assertion that "Marriage is an outdated institution" was 37.5% in Luxembourg, 35.4% in France, 34.3% in Belgium, 31.2% in Spain, 30.5% in Austria, 29.2% in Germany, 27.7% in Switzerland, 27.2% in Bulgaria, 27.0% in the Netherlands, 25.0% in Slovenia. See for each country: Variable Description – Family – Q 45.
The fact that many couples choose to live together without formalizing their relation is also recognized by the European Union. A 2004 directive forbids EU members from denying entry or residence of partners "with whom the Union citizen has a durable relationship, duly attested."
People may live together for a number of reasons. Cohabitants could live together to save money, or because of the convenience of living with another, or a need to find housing. Lower income individuals facing financial uncertainty may delay or avoid marriage, not only because of the cost of a wedding but also because of fear of financial hardship if a marriage were to end in divorce.
When responding to a survey of the reasons for cohabitation, most couples listed reasons such as spending more time together, convenience-based reasons, and testing their relationships, while few gave the reason that they do not believe in marriage. The extremely high costs of housing and tight budgets of the economy are also factors that can lead a couple to cohabitation.
Sixty percent of all marriages are preceded by a period of cohabitation. Researchers suggest that couples live together as a way of trying out marriage to test compatibility with their partners, while still having the option of ending the relationship without legal implications. In 1996, "More than three-quarters of all cohabitors reported plans to marry their partners, which implies that most of them viewed cohabitation as a prelude to marriage." Cohabitation shares many qualities with marriage. Often couples who are cohabiting share a residence, personal resources, exclude intimate relations with others, and more than 10% of cohabiting couples have children. "Many young adults believe cohabitation is a good way to test their relationships prior to marriage." Couples who have plans to marry before moving in together or who are engaged before cohabiting typically marry within two years of living together. The state of cohabitation of a couple often ends either in marriage or in break-up; according to a 1996 study about 10% of cohabiting unions remained in this state more than five years. According to a survey done by The National Center for Health Statistics, "over half of marriages from 1990 to 1994 among women began as cohabitation."
Cohabitation can be an alternative to marriage in situations where marriage is not possible for legal or religious reasons (such as same-sex, interracial or interreligious marriages).
Cohabitation, sometimes called de facto marriage, is becoming a more common substitute for conventional marriage. Common-law marriage in the United States can still be contracted in nine US states, and in two others under restriction. This helps provide the surviving partner a legal basis for inheriting the decedent's belongings in the event of the death of their cohabiting partner. In modern cohabiting relationships, forty percent of households include children, giving an idea of how cohabitation could be considered a new normative type of family dynamic. In 2012, 41% of all births in the US were to unmarried women. In three states (Mississippi – 55%, Louisiana – 53%, and New Mexico – 52%) births outside marriage were in the majority; the lowest percentage of births outside marriage was in Utah, at 19%. During the period 2006–2010, 58% of births outside marriage were to cohabiting parents.
The rise in the number of cohabiting couples and children born out of wedlock in the Western world has made cohabitation a strong focus of sociological research. The rise in cohabiting couples in the United States, from around 450,000 in 1960 to 7.5 million in 2011 has been accompanied by US research performed on child development within cohabiting households. Opponents of cohabitation say non-marital parenting is an unsuitable environment for a child's development. One study from 2002 correlated lower numeracy skills and higher delinquency to children of cohabiting couples; however, recent studies that control for factors including poverty, the educational level of parents and violence in the home show children of cohabiting couples are developmentally similar to peers of comparable married couples.
A study on the 1995 and 2002 National Survey of Family Growth found increases in both the prevalence and duration of unmarried cohabitation. The study found that 40% of children in the United States would live in a cohabiting household by age 12, and children born to single mothers were more likely than those born to married mothers to live in a cohabiting household. The percentage of women ages 19–44 who had ever cohabited increased from 45% in 1995 to 54% in 2002.
In 2002, 63% of women who graduate from high school were found to spend some time cohabiting, compared to only 45% of women with a four-year college degree. Cohabiting couples who have children often get married. One study found that children born of parents who cohabit are 90% more likely to end up living in households with married parents than children born to single mothers. 67% of unmarried Hispanic mothers are expected to marry, while 40% of African American mothers are expected to marry.
Religion can also lead to societal pressures against cohabitation especially within highly religious communities. Some couples may refrain from cohabitation because one or both partners fear disappointing or alienating conservative family members. Young adults who grew up in families that oppose cohabitation have lower rates than their peers.
The increase in cohabitation in the United States and other developed nations has been linked to the secularization of those countries. Researchers have noted that changes in the religious demographics of a society have accompanied the rise in cohabitation.
Non-marital and same-sex relationships are forbidden by the Islamic law of Zina, and cohabitation is against the law in many Muslim majority countries including Saudi Arabia, Pakistan, Afghanistan, Iran, Kuwait, Maldives, Morocco, Oman, Mauritania, United Arab Emirates, Sudan, and Yemen.
In 2002, the CDC found that for married couples the likelihood percentage of the relationship ending after five years is 20%, for unmarried cohabitators the likelihood percentage is 49%. After 10 years the likelihood percentage for the relationship to end is 33% for married couples and 62% for unmarried cohabitators. One German study found that in regions with high rates of childbirth to cohabitating parents, no negative effect is observed in cohabitation. The study states "union stability of cohabiting mothers is positively related to their prevalence".
A 2004 study of 136 couples (272 individuals) from researchers at the University of Denver found differences among couples that cohabited before engagement, after engagement, or not until marriage. The longitudinal study collected survey data before marriage and 10 months into marriage, with findings suggesting those who cohabit before engagement are at greater risk for poor marital outcomes than those who cohabit only after engagement or at marriage.
A follow-up survey by the researches of over 1,000 married men and women married in the past 10 years found those who moved in with a lover before engagement or marriage reported significantly lower quality marriages and a greater possibility of a separation than other couples.
About 20% of those who cohabited before getting engaged had since suggested splitting – compared with only 12% of those who only moved in together after getting engaged and 10% who did not cohabit prior to marriage.
Another 2004 study of 92 couples linked communication to cohabitation and instability. They found that married couples who cohabited before they were married had more negative problem-solving and communication skills. They also found that those who had cohabited expressed more (verbal) aggression throughout their conversations. This negative communication could be contributing to the cohabitation effect and causing a larger amount of marital instability.
The researchers from Denver suggest that relationships with pre-engagement cohabitation "may wind up sliding into marriage", whereas those that only cohabit post engagement or marriage make a more clear decision. This could explain their 2006 study of 197 heterosexual couples finding that men who cohabited with their spouse before engagement were less dedicated than men who cohabited only after engagement or not at all before marriage.
In some heterosexual couples, women are more likely to understand cohabitation as an intermediary step preceding marriage, and men more likely to perceive it without an explicit connection to marriage.
An analysis of data from the CDC's National Survey of Family Growth data from 1988, 1995, and 2002 suggests that the positive relationship between premarital cohabitation and marital instability has weakened for more recent birth and marriage cohorts, as the total number of couples cohabiting before marriage has increased.
Later CDC work found that between 2002 and 2006-2010, the number of couples in opposite-sex cohabiting relationships increased from 9.0% to 11.2% for women, and from 9.2% to 12.2% for men.
Drawing on the 2006–2008 data, Princeton University researchers examined whether and to what extent variation in premarital cohabitation experiences influence marital stability. They found that the relationship between cohabitation and marital instability is complex and depends in part on marriage cohort, race/ethnicity, and marriage plans. Their analyses reveal that a 'cohabitation effect' exists only for women married prior to 1996, and that, until marriage plans are considered, there is no cohabitation effect among women married since 1996.
Recent research from 2011 by the Pew Research Center has found that the number of couples that cohabit before marriage has increased. 44% of adults (and more than half of 30- to 49-year-olds) say they have cohabited at some point. Nearly two-thirds of adults who ever cohabited (64%) say they thought about it as a step toward marriage. The report also notes a trend toward rising public acceptance of cohabiting couples over the years. Most Americans now say the rise in unmarried couples living together either makes no difference to society (46%) or is good for society (9%).
A 2012 study found that, among cohabiting individuals, those who were engaged prior to cohabitation or had "definite plans for marriage" were linked to lower risks of marital instability among women, but the relationship was not observed with men.
One study on low to moderate income couples living with minor children found that respondents who became sexually involved within the first month of their relationship were correlated to lower scores of relationship quality among women. Another study found respondents to a mail-in survey self-reported higher levels of commitment in the cohabiting group, as well as lower relationship satisfaction and more negative communication.
A 2018 study found that cohabiting before marriage was linked to a lower risk of divorce during the first year of marriage, but a greater risk of divorce in the long run. However, a report published by the Council on Contemporary Families that same year found that couples who cohabited before marriage were less likely to divorce than couples who did not.
According to an article by Judith Treas and Deirdre Giesen, cohabiting couples are twice as likely to experience infidelity within the relationship than married couples.
A study of the United States and multiple countries in Europe came to the result that women who continue to cohabit after birth have significantly lower probability of having a second child than married women in all countries except those in Eastern Europe. Another study, on the contrary, came to the result that cohabiting couples in France have equal fertility as married ones. Also, Russians have a higher fertility within cohabitation, while Romanians rather tend to have childless marriages.
Survey data from 2003 in Romania came to the result that marriage equalized the total fertility rate among both highly educated and low educated people to approximately 1.4. Among those cohabiting, on the other hand, lower level of education increased fertility rate to 1.7, and a higher level of education decreased it to 0.7. On the other hand, another study came to the result that Romanian women with little education have about equal fertility in marital and cohabiting partnerships.
Despite the perceived disincentive to marry that the EITC provides, cohabiting couples suffer many financial losses as their unions are not recognized with the same legal and financial benefits as those who are legally married. These financial penalties can include the costs of separate insurance policies and the costs of setting up legal protections similar to those that are automatically granted by the state upon marriage.
Additionally, William Doherty, a professor in the Department of Family Social Science at the University of Minnesota has remarked that in his research he has found that "committed cohabiting relationships seem to confer many of the benefits of marriage".
A 2003 study by the Australian Institute of Family Studies found that "The differences in measured outcomes for those from direct and indirect marriages appear to be entirely attributable to other factors." The study concluded that the evidence suggests that premarital cohabitation has "little impact one way or the other" on the chances of any subsequent marriage surviving.
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Cohabitation in the United States became common in the late 20th century. , 4.85 million unmarried couples were living together, and , about half of all women aged 15 to 44 had lived unmarried with a partner. In 2007, it is estimated that 6.4 million households were maintained by two opposite sex persons who said they were unmarried. In 2012, the General Social Survey found that public disapproval of cohabitation had dropped to 20% of the population.
Researchers at the National Center for Family and Marriage Research estimated in 2011 that 66% of first marriages are entered after a period of cohabitation. According to the 2009 American Community Survey conducted by the Census Bureau, the proportion of 30- to 44-year-olds living together has almost doubled since 1999, from 4% to 7%. Fifty-eight percent of women aged 19 to 44 had ever cohabited in data collected in 2006–08, while in 1987 only 33% had. Cohabitation is more prevalent among those with less education. "Among women ages 19 to 44, 73% of those without a high school education have ever cohabited, compared with about half of women with some college (52%) or a college degree (47%)," note the Pew study's authors, Richard Fry and D'Vera Cohn.Luscombe, B. (June 2011). "More Americans Are Cohabiting, But the Benefits of Living Together Apply Mainly to the Wealthier, More Educated". Retrieved 21 March 2012
Before the mid-20th century, laws against cohabitation, fornication, adultery and other such behaviors were common in the US (especially in Southern and Northeastern states), but these laws have been gradually abolished or struck down by courts as unconstitutional.
As of December 2023, cohabitation of unmarried couples remains illegal in two states (Mississippi and North Carolina), while as of 2023 fornication remains illegal in two states (Georgia and South Carolina). These laws are almost never enforced and are now believed to be unconstitutional since the legal decision Lawrence v. Texas in 2003. However, these laws may have indirect effects. For example, one consequence may be that one may not claim their partner as a dependent (for a tax exemption), whereas in the other states it may be possible to do so after meeting four criteria: residency, income, support and status.
In 2006, in North Carolina, Pender County Superior Court judge Benjamin G. Alford ruled that North Carolina's cohabitation law is unconstitutional. However, the Supreme Court of North Carolina has never had the opportunity to rule on it, so the law's statewide constitutionality remains unclear.
On 13 December 2013, US Federal judge Clark Waddoups ruled in Brown v. Buhman that the portions of Utah's anti-polygamy laws which prohibit multiple cohabitation were unconstitutional, but also allowed Utah to maintain its ban on multiple marriage licenses. This decision was overturned by the United States Court of Appeals for the Tenth Circuit, thus effectively recriminalizing polygamy as a felony. In 2020, Utah voted to downgrade polygamy from a felony to an infraction, but it remains a felony if force, threats or other abuses are involved. Unlawful cohabitation, where prosecutors did not need to prove that a marriage ceremony had taken place (only that a couple had lived together), had been a major tool used to prosecute polygamy in Utah since the 1882 Edmunds Act.
As of 2000, in Argentina 58% of births were to unmarried women.
The percentage of births outside marriage has increased throughout Latin America during the past decades, and there is also a relation to place of residence: women living in the capital city are more likely to have children outside marriage than those living in other parts of the country. Recent data shows figures for non-marital childbearing to be 74% for Colombia, 69% for Peru, 68% for Chile, 66% for Brazil and 55% for Mexico.
On 12 June 2020, the Uttarakhand High Court reiterated in the case of Madhu Bala v. State of Uttarakhand and others (Habeas Corpus Petition No. 8 of 2020) that consensual cohabitation between two adults of the same-sex is legal and akin to an opposite sex relationship.
Under Iranian law, which is based on Islamic Sharia law, the cohabitation of a man and a woman outside the framework of official marriage is a crime.
It is estimated that the duration of a cohabitation in Iran is between one and three years.
Cohabitation has no place in Iran from traditional social, legal and Religion points of view. However, cohabitation in Iran can be explained by considering recent cultural changes in Iranian society, including the growth of individualism, modernity, and fluid relationships, and the gaps and conflicts between values.
Various factors such as economic crises and cultural and social changes in cities are reasons for the increase in the number of cohabitation in Iran. In other words, the emergence of capitalism, the increase of job insecurity, the emergence of moral liberalism, the revision of cultural traditions, the anonymity of people in cities, the elimination of the concepts and functions of neighborhoods, changes in family structures and the emergence of temporary relationships are among the major reasons for white marriage in Iran.
New research published by social anthropologist Kameel Ahmady and his team under the title House with Open Door: A Comprehensive Research Study on White Marriage (Cohabitation) in Iran reveals the previously concealed and multi-dimensional aspects of this phenomenon at the macro level, focusing on the Tehran, Mashhad and Isfahan metropolitan areas. The research pieces argues that this phenomenon is more prevalent among educated and post-graduate young people who have migrated to metropolitan areas for work and education.
While couples of all ages cohabit, the phenomenon is much more common among younger people. In late 2005, 21% of families in Finland consisted of cohabiting couples (all age groups). Of couples with children, 18% were cohabiting. Of ages 18 and above in 2003, 13.4% were cohabiting. Generally, cohabitation amongst Finns is most common for people under 30. Legal obstacles for cohabitation were removed in 1926 in a reform of the Criminal Code, while the phenomenon was socially accepted much later on. In France, 17.5% of couples were cohabiting as of 1999.
The Victorian era of the late 19th century is famous for the Victorian standards of personal morality. Historians generally agree that the middle classes held high personal moral standards and rejected cohabitation. They have debated whether the working classes followed suit. Moralists in the late 19th century such as Henry Mayhew decried high levels of cohabitation without marriage and illegitimate births in London slums. However new research using computerized matching of data files shows that the rates of cohabitation were quite low—under 5% – for the working class and the urban poor.
Falling marriage rates and increased births outside marriage have become a political issue, with questions of whether the government should promote marriage or focus on the status of a parent rather than a spouse; the Conservative Party support the former whilst Labour Party and the Liberal Democrats support the latter. There are also differences between England and Wales and Scotland, with the latter being more accepting of cohabitation.
In Hungary, cohabitation was an uncommon phenomenon until the late 1980s and it was largely confined to the divorced or widowed individuals. Among the ethnic groups, Gypsy/Roma tended to have higher rates of cohabitation, mainly due to their reluctance to register their marriages officially. Since the 1980s, cohabitation became much more frequent among all ethnic groups and it has been argued to have strongly influenced the decline in fertility. In 2015, 47.9% of births were to unmarried women.
Cohabitation is illegal according to Sunni Islam sharia law.See commentary on verses : Vol. 3, notes 7–1, p. 241; 2000, Islamic Publications. Cohabitation, Bi'ah, is a legal status, "Yadua BetTzibbur", by the Jews Halakha (Halacha) religious Law.
Contemporary objections to cohabitation
Effect on children
Religious views
Effects on marriage and family life
Likelihood of split
Abuse and infidelity
Fertility
Financial effects
No effect
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