Measuring Cohabitation and Family Structure in the United States: Assessing the Impact of New Data From the Current Population Survey

In 2007, the Current Population Survey (CPS) introduced a measure that identifies all cohabiting partners in a household, regardless of whether they describe themselves as ??unmarried partners?? in the relationship to householder question. The CPS now also links children to their biological, step-, and adoptive parents. Using these new variables, we analyze the prevalence of cohabitation as well as the demographic and socioeconomic characteristics of different-sex cohabiting couples during the years 2007?C2009. Estimates of cohabitation produced using only unmarried partnerships miss 18?% of all cohabiting unions and 12?% of children residing with cohabiting parents. Although differences between unmarried partners and most newly identified cohabitors are small, newly identified cohabitors are older, on average, and are less likely to be raising shared biological or adopted children. These new measures also allow us to identify a small number of young, disadvantaged couples who primarily reside in households of other family members, most commonly with parents. We conclude with an examination of the complex living arrangements and poverty status of American children, demonstrating the broader value of these new measures for research on American family and household structure.     

The Educational Homogamy Gap Between Married and Cohabiting Couples in Latin America

The explosive expansion of non-marital cohabitation in Latin America since the 1970s has led to the narrowing of the gap in educational homogamy between married and cohabiting couples (what we call “homogamy gap”) as shown by our analysis of 29 census samples encompassing eight countries: Argentina, Brazil, Chile, Colombia, Costa Rica, Ecuador, Mexico, and Panama (N = 2,295,160 young couples). Most research on the homogamy gap is limited to a single decade and a small group of developed countries (the United States, Canada, and Europe). We take a historical and cross-national perspective and expand the research to a range of developing countries, where since early colonial times, traditional forms of cohabitation among the poor, uneducated sectors of society have coexisted with marriage, although to widely varying degrees from country to country. In recent decades, cohabitation is emerging in all sectors of society. We find that among married couples, educational homogamy continues to be higher than for those who cohabit, but in recent decades, the difference has narrowed substantially in all countries. We argue that assortative mating between cohabiting and married couples tends to be similar when the contexts in which they are formed are also increasingly similar.     

How well can we track cohabitation using the SIPP? A consideration of direct and inferred measures

Cohabitation is an alternative to marriage and to living independently for an increasing number of Americans. Still, research that explores links between living arrangements and economic behavior is limited by a lack of data that explicitly identify cohabiting couples. To aid researchers in using the Survey of Income and Program Participation's (SIPP) rich data to explore cohabitation issues, we consider direct and inferred measures of cohabitation. We find, first, that the use of inferred definitions (relative to direct measures) in the SIPP is likely to yield higher cohabitation rates in the United States by incorrectly coding roommates as cohabitors. Second, the SIPP (whether by direct or inferred measures) counts a significantly larger number of cohabiting couples than the widely used Current Population Survey (CPS). Third, spells of cohabitation occur less frequently and last longer when a direct measure of cohabitation is used than when either of the two inferred measures of cohabitation is used; ours is the first article to reveal this result.     

Transitions From Sexual Relationships Into Cohabitation and Beyond

Much research on cohabitation has focused on transitions from cohabitation to marriage or dissolution, but less is known about how rapidly women progress into cohabitation, what factors are associated with the tempo to shared living, and whether the timing into cohabitation is associated with subsequent marital transitions. We use data from the 2006–2013 National Survey of Family Growth to answer these questions among women whose most recent sexual relationship began within 10 years of the interview. Life table results indicate that transitions into cohabitation are most common early in sexual relationships; nearly one-quarter of women had begun cohabiting within six months of becoming sexually involved. Multivariate analyses reveal important social class disparities in the timing to cohabitation. Not only are women from more-advantaged backgrounds significantly less likely to cohabit, but those who do cohabit enter shared living at significantly slower tempos than women whose mothers lacked a college degree. In addition, among sexual relationships that transitioned into cohabiting unions, college-educated women were significantly more likely to transition into marriage than less-educated women. Finally, although the tempo effect is only weakly significant, women who moved in within the first year of their sexual relationship demonstrated lower odds of marrying than did women who deferred cohabiting for over a year. Relationship processes are diverging by social class, contributing to inequality between more- and less-advantaged young adults.     

Pathways to a Stable Union? Pregnancy and Childbearing Among Cohabiting and Married Couples

This study analyzes the stability of cohabiting and marital unions following a first birth. But unlike previous research, it compares the subsequent trajectories of unions that began with a pregnancy to those in which conceptions came after coresidence. The U.S. data from the 2006–2010 and 2011–2013 cross-sectional files of the National Survey of Family Growth indicate that roughly 1-in-5 first births were associated with rapid transitions from conception into either cohabitation or marriage. Moving in together following a pregnancy—especially an unintended one—is unlikely to lead to marital success or union stability. Compared with marital unions, dissolution rates following birth were particularly high for couples who entered a cohabiting union following conception. Only a small minority of these couples married (i.e., less than one-third), and these marriages experienced high dissolution rates. The results also suggest that the most committed cohabiting couples got married after finding themselves pregnant, leaving behind the most dissolution-prone cohabiting couples. The American family system is being transformed by newly emerging patterns of fertility among cohabiting couples.     

Why are cohabiting relationships more violent than marriages?

In response to increases in cohabitation in the United States, researchers have recently focused on differences between cohabiting and marital unions. One consistent finding is a higher rate of domestic violence among cohabiting couples as compared with married couples. A prominent explanation for this finding is that cohabitation is governed by a different set of institutionalized controls than marriage. This article explores an alternative explanation, namely, that differences in selection out of cohabitation and marriage, including selection of the least-violent cohabiting couples into marriage and the most-violent married couples into divorce, lead to higher observed rates of violence among cohabiting couples in cross-sectional samples. Our results suggest that researchers should be cautious when making comparisons between married and cohabiting couples in which the dependent variable of interest is related to selection into and out of relationship status.     

Welfare, work, and changes in mothers’ living arrangements in low-income families

Data from a two-wave survey of low-income families in Boston, Chicago, and San Antonio are used to replicate recent reports of a modest increase in the number of low-income children living in two-adult families and to analyze the increase. We find that most of the increase occurred through the addition of a man other than the biological father to the household and that more of it occurred through cohabitation than through marriage. Moreover, across the two waves, cohabiting and marital unions were highly unstable. We review research on stepfamilies and on instability in children’s living arrangements, and we conclude that the kinds of two-adult families being formed in these low-income central-city neighborhoods may not benefit children as much as policy-makers hope. In addition, we investigate the associations between marital and cohabiting transitions, on the one hand, and transitions into and out of Temporary Assistance to Needy Families (TANF) receipt, employment, and Earned Income Tax Credit (EITC) usage between the two waves on the other. We find that marital transitions are related to TANF and employment transitions but that cohabiting transitions are not. We suggest that low-income mothers may view marriage as more of an economic partnership than cohabitation and may expect more of an economic contribution from a husband than from a cohabiting partner.     

Changes in Cohabitation After the Birth of the First Child in Chile

In Chile, as in other Latin American countries, most children born outside of marriage are born to currently cohabiting couples. After having their first child, parents could marry, separate, or experience no change in union status. This paper explores changes in cohabitation that occur after the birth of the first child in Chile and analyzes how these changes might be associated with the birth of children and socioeconomic status. The data come from the New Chilean Family Survey, a small longitudinal survey administered to women after giving birth (n = 564). I use life tables and event history techniques to assess changes in respondent union status up to 4 years after the birth of the first child, and to study the transitions out of cohabitation. The results indicate that the unions in the sample are relatively stable, because less than 40 percent of cohabiters change status over the period of 4 years. However, marriage still appears to be a more stable type of union than cohabitation. Among cohabiters, there is evidence of a nonlinear relation between union stability and educational attainment, because the most stable unions are the unions of women with a high school diploma and not the unions of women who did not complete their secondary education. Having planned the first birth and the birth of an additional child seems to consolidate the cohabiting union, because these variables are not related to the entry into marriage, but they are related to lower risks of dissolution. These findings suggest that the Chilean case differs from the cases of Europe and the United States.     

Welfare,work, and changes in mothers’ living arrangements in low-income families

Data from a two-wave survey of low-income families in Boston, Chicago, and San Antonio are used to replicate recent reports of a modest increase in the number of low-income children living in two-adult families and to analyze the increase. We find that most of the increase occurred through the addition of a man other than the biological father to the household and that more of it occurred through cohabitation than through marriage. Moreover, across the two waves, cohabiting and marital unions were highly unstable. We review research on stepfamilies and on instability in childrens living arrangements, and we conclude that the kinds of two-adult families being formed in these low-income central-city neighborhoods may not benefit children as much as policy-makers hope. In addition, we investigate the associations between marital and cohabiting transitions, on the one hand, and transitions into and out of Temporary Assistance to Needy Families (TANF) receipt, employment, and Earned Income Tax Credit (EITC) usage between the two waves on the other. We find that marital transitions are related to TANF and employment transitions but that cohabiting transitions are not. We suggest that low-income mothers may view marriage as more of an economic partnership than cohabitation and may expect more of an economic contribution from a husband than from a cohabiting partner.     

Socioeconomic Differences According to Family Arrangements in Chile

Family changes have accelerated in Chile in the last decades. Impressively, the proportion of children born outside of marriage has reached over 60%, at the same time that marriage has declined and cohabitation has increased. These changes are regularly considered indicators of a second demographic transition. This study describes the socioeconomic differences that currently exist in Chile between first-time mothers living in different family arrangements, and it asks to what extent these differences are the result of long term disadvantages passed on from the families the respondents grew up in. The data comes from a postpartum survey implemented in Santiago (N = 686 women). The results show large differences in the socioeconomic wellbeing of women in different family arrangements. Women in nuclear marriages stand far apart from any other group in terms of educational attainment, income and participation in the labor force. Cohabiters and married women in extended households enjoy a level of socioeconomic wellbeing that is similar, but not as high as that of married women in nuclear households. Cohabiters in extended households, visiting, and single mothers look alike, and are the most vulnerable women in the sample. The link between the current scenario and the family where the respondents grew up is strong. Under these circumstances, it is hard to interpret the recent demographic changes in Chilean families as a prototypical case of the SDT. The trend the country is following resembles closer the dichotomous trajectory the U.S. has followed.     

Pathways to educational homogamy in marital and cohabiting unions

There is considerable disagreement about whether cohabitors are more or less likely to be educationally homogamous than married couples. Using data from the National Longitudinal Survey of Youth, I reconcile many of the disparate findings of previous research by conducting a “stock and flow” analysis of assortative cohabitation and marriage. I find that cohabitors are less likely to be educationally homogamous than married couples overall, but these differences are not apparent when cohabiting and marital unions begin. Instead, the results suggest that differences in educational homogamy by union type are driven by selective exits from marriage and cohabitation rather than by differences in partner choice. Marriages that cross educational boundaries are particularly likely to end. The findings suggest that although cohabitors place greater emphasis on egalitarianism than married couples, this does not translate into greater educational homogamy. The findings are also consistent with a large body of research on cohabitation and divorce questioning the effectiveness of cohabitation as a trial marriage.     

Shifting Childrearing to Single Mothers: Results from 17 Western Countries

We investigate how recent changes in the Western family have affected childhood living arrangements. For 17 developed countries, we use multistate life table techniques to estimate childhood trajectories of coresi‐dence with biological fathers versus other maternal partners. In all countries childhood exposure to single parenting is more often caused by parental separation than out‐of‐partnership childbearing. Both exposure to single parenting and expectancy of childhood spent with a single non‐cohabiting mother vary widely across countries, with the United States exhibiting the highest levels of each at early 1990s rates. The greatest international variations concern parental cohabitation—its prevalence, durability, and the degree to which its increase has compensated for a decrease in the expectancy of childhood spent with married parents. Overall, we find little evidence of international convergence in childrearing arrangements, except that in countries where parental marriage has declined over time, childrearing has predominantly shifted to single mothers.     

Marriage or dissolution? Union transitions among poor cohabiting women

The objective of this paper is to identify the incentives and barriers to marriage among cohabiting women, especially disadvantaged mothers who are targets of welfare reform. We use the newly released cohabitation data from the National Longitudinal Survey of Youth (1979-2000), which tracks the partners of cohabiting women across survey waves. Our results support several conclusions. First, cohabiting unions are short-lived--about one-half end within one year, and over 90% end by the fifth year. Unlike most previous research, our results show that most cohabiting unions end by dissolution of the relationship rather than by marriage. Second, transitions to marriage are especially unlikely among poor women; less than one-third marry within five years. Cohabitation among poor women is more likely than that among nonpoor women to be a long-term alternative or substitute for traditional marriage. Third, our multinomial analysis of transitions from cohabitation into marriage or dissolution highlights the salience of economically disadvantaged family backgrounds, cohabitation and fertility histories, women's economic resources, and partner characteristics. These results are interpreted in a policy environment that increasingly views marriage as an economic panacea for low-income women and their children.     

Latin American Households in Comparative Perspective

Comparative family sociology has had little to say about the Latin American family or household despite it links to a European colonial culture mixed with a distinct set of indigenous and historical circumstances. In this paper tentative judgements are put forward about the similarities and differences between the Western and Latin American household by examining four of its dimensions: the household's relative complexity, the separate residence of conjugal units, the incidence of households headed by women, and the incidence of household members being unrelated to the head. Data come from the World Fertility Survey household files gathered during the middle 1970s in six countries: Mexico, Costa Rica, Panama, the Dominican Republic, Colombia and Peru. We find that household complexity in the six countries is intermediate between that of the West and East. Many of the households are extended laterally instead of vertically, because conjugal couples tend to reside in separate households, but often live with unmarried relatives as well. In addition, a high level of marital instability results in a significant proportion of households headed by women, many of them containing members of the extended family. Finally, whereas the circulation of young unmarried people of both sexes was common in rural areas in the West, being an unrelated individual in another's household is most common in urban areas among females between 15 and 19 years old.     

Nonmarital cohabitation and fertility in the United States and Western Europe

The increasing popularity of nonmarital cohabitation and a decline in marriage rates in the United States and Western Europe has led to a growing research interest in cohabitation without marriage and its relationship to traditional marriage. This article examines the evidence on the prevalence of cohabitation and the characteristics of cohabitants, and focuses on the childbearing behavior of cohabiting couples who are not married. The evidence to date suggests that in Denmark and Sweden cohabitation is widespread, especially among young people, and childbearing within cohabitational unions is relatively common. In the rest of Western Europe and in the United States, cohabitation is less common and fertility is less frequent. Fertility will be affected to the extent that couples delay having children until they are married. Policy and law concerning cohabitants and their children are changing rapidly. Most of these changes have resulted in a blurring of the distinctions between married and unmarried couples and between legitimate and illegitimate children.     

Life course transitions of American children: Parental cohabitation, marriage, and single motherhood

We examine the life course transitions into and from families headed by unmarried cohabiting couples for a recent cohort of American children. Life table estimates, based on data from the National Longitudinal Survey of Youth mother-child files, indicate about one in four children will live in a family headed by a cohabiting couple sometime during childhood. Economic uncertainty is an important factor determining whether children in single-parent families subsequently share a residence with a mother's unmarried partner. Moreover, virtually all children in cohabiting-couple families will experience rapid subsequent changes in family status. Our estimates provide a point of departure for future work on children's exposure to parental cohabitation and its social and economic implications.     

“Living in sin” and marriage: A matching model

This paper develops a two sided matching model of premarital cohabitation and marriage in which premarital cohabitation serves as a period of learning. We solve for the optimal policy to be followed by individuals by treating the model as a three stage dynamic programming problem. We find that couples are more discriminating when forming marital unions than when forming cohabiting unions. Cohabitation unions arise among members of the same “class” and there is overlap between the classes formed by marital unions and cohabiting unions. This implies that some cohabiting unions progress to marriage while others do not, a finding borne out by empirical studies. Received: 4 November 1999/Accepted: 4 September 2000     

Changing compatibility of cohabitation and childbearing between young British women born in 1958 and 1970

We investigate the effect of parenthood on whether non-marital unions led to marriage or parting for two cohorts of British women when they were aged between 16 and 29. We compare the effect of conceptions leading to births and the presence and characteristics of children on the odds that a cohabitation was dissolved, or that it was converted to marriage, for women born in 1958 and 1970. A multilevel, multiprocess, competing-risks model allows for multiple cohabitation per woman and endogeneity of fertility status. We find that cohabiting couples' response to impending parenthood and the presence of children changed over time. In particular, the proportion of cohabiting couples who married before a birth decreased and, in the 1970 cohort only, the risk of dissolution declined during pregnancy. There is also evidence that the presence of a child cemented a cohabiting union for women from the 1970, but not the earlier, cohort.     

Family boundary ambiguity and the measurement of family structure: the significance of cohabitation

We used data from the first wave of the National Longitudinal Study of Adolescent Health to examine family boundary ambiguity in adolescent and mother reports of family structure and found that the greater the family complexity, the more likely adolescent and mother reports of family structure were discrepant. This boundary ambiguity in reporting was most pronounced for cohabiting stepfamilies. Among mothers who reported living with a cohabiting partner, only one-third of their teenage children also reported residing in a cohabiting stepfamily. Conversely, for those adolescents who reported their family structure as a cohabiting stepfamily, just two-thirds of their mothers agreed. Levels of agreement between adolescents and mothers about residing in a two-biological-parent family, single-mother family, or married stepfamily were considerably higher. Estimates of the distribution of adolescents across family structures vary according to whether adolescent, mother, or combined reports are used. Moreover, the relationship between family structure and family processes differed depending on whose reports of family structure were used, and boundary ambiguity was associated with several key family processes. Family boundary ambiguity presents an important measurement challenge for family scholars.     

Income dynamics in couples and the dissolution of marriage and cohabitation

Several studies have shown that a wife's strong (socio)economic position is associated with an increase in the risk of divorce. Less is known about such effects for cohabiting relationships. Using a unique and large-scale sample of administrative records from The Netherlands, we analyze the link between couples' income dynamics and union dissolution for married and cohabiting unions over a 10-year period. We find negative effects of household income on separation and positive effects of the woman's relative income, in line with earlier studies. The shape of the effect of the woman's relative income, however, depends on the type of union. Movements away from income equality toward a male-dominant pattern tend to increase the dissolution risk for cohabiting couples, whereas they reduce the dissolution risk for married couples. Movements away from income equality toward a female-dominant pattern (reverse specialization) increase the dissolution risks for both marriage and cohabitation. The findings suggest that equality is more protective for cohabitation, whereas specialization is more protective for marriage, although only when it fits a traditional pattern. Finally, we find that the stabilizing effects of income equality are more pronounced early in the marriage and that income equality also reduces the dissolution risk for same-sex couples.