Strengthening Families to Improve Child Outcomes

Treat family stability as a cause of child outcomes, not just a marker of it, because the strongest study to date now shows a real causal effect. A 2025 Census Bureau working paper linked tax and Census records for millions of children and compared siblings exposed to the same divorce for different lengths of time, finding that an early-childhood divorce lowers a child’s adult income by 9 to 13 percent and raises their risk of teen birth, incarceration, and early death (Census working paper CES-WP-25-28). Because that sibling design isolates the effect of the divorce itself, it is causal evidence, not just correlation, and income loss explains only part of the harm and almost none of the rise in incarceration.

The same data shows children of never-married single parents fared worst of all, with incarceration rates about three times higher than children of always-married parents, though that single-parent comparison is correlational rather than from the causal sibling design. Together this strengthens the case that family structure matters in its own right, while staying honest that the cleanest proof so far is for divorce specifically.

Policymakers should treat family stability as a measurable child-wellbeing goal, not just an income problem. The simplest objection to a family-structure argument is that two-parent families just have more money, but the research has tested that directly. Multiple analyses find that the advantages of growing up with stably married parents persist after controlling for parent education, family income and poverty status, race, parental involvement, and school quality (Fordham Institute summary). The gap shrinks when you adjust for income, but it does not disappear.

The pattern shows up in serious outcomes, not just test scores. Using national longitudinal data, Harper and McLanahan found that boys raised in father-absent households faced significantly higher odds of incarceration even after accounting for income, parent education, and race (Office of Justice Programs). Work on intergenerational mobility likewise finds that living with both parents through the high school years gives the largest boost to adult economic outcomes, with income and stability reinforcing each other (Becker Friedman Institute).

Programs should not be sold as child-development fixes on the theory that more cash alone reshapes outcomes. If money were the primary driver, giving low-income families more of it should improve children’s development. The strongest test of that idea is Baby’s First Years, a randomized controlled trial that gave low-income mothers $333 a month for the first several years of their children’s lives, and after four years found no statistically significant effect on children’s language, executive function, social-emotional development, or brain activity (NBER Working Paper 33844). A randomized experiment is the cleanest evidence available, and this one cuts against the view that cash transfers alone reshape child outcomes.

The first concrete step is to fund and require rigorous, linked data and evaluation so we can finally tell which family policies work. The honest state of play is that the United States has done a poor job connecting welfare-policy data to outcomes, so we genuinely do not know whether measures like family caps help, hurt, or do nothing. The federal GAO reviewed family caps, which deny extra benefits for additional children born on welfare, and concluded the available research was too limited to determine their effect on out-of-wedlock births at all (GAO-01-924).

That uncertainty runs in every direction. New Jersey’s evaluation found births fell at similar rates among capped and uncapped families (Guttmacher summary of the Rutgers study), while a later analysis using modern methods found no clear average effect (Janmohamed, Yale, 2022). Crucially, none of these studies measured marriage, so the real lesson is that we lack the linked data and long-run evaluation needed to know what works, and that gap should be fixed before drawing strong conclusions.

Reform benefit rules so that marrying a working partner no longer triggers a sudden loss of support. Current welfare programs often impose a “marriage penalty,” where benefits phase out as a household adds a second earner, so a low-income mother can lose significant support by marrying (Besharov and Sullivan, AEI). Analysts have estimated these penalties at roughly 15 to 23 percent of a poor couple’s combined income, and being on welfare was associated with a sharply lower chance of marrying the following year (same source).

Concretely, that means lengthening benefit phase-outs so marriage does not trigger a sudden cliff, coordinating across programs such as SNAP and childcare subsidies so the penalties do not stack, and pairing this with support for family stability rather than stigma toward single parents. This is a structure-focused lever that does not involve cutting aid to children, and it should be judged on whether it increases marriage and stability.

Frame every reform around children’s outcomes and economic mobility, not around cutting rolls or stigmatizing parents. The case for prioritizing stable two-parent families rests on a real, income-adjusted association with better child outcomes, reinforced by experimental evidence that cash alone is not sufficient (Baby’s First Years). The most defensible response is to stop penalizing marriage, build the data to learn what works, and support family stability directly, which keeps the argument grounded where agreement is broadest.

The same goal, stronger and more stable two-parent families, looks different depending on the levers you control. Here is who can do what.

What is TANF? Temporary Assistance for Needy Families is the main federal cash-welfare program for low-income families with children. States run their own versions using federal block grants, which is why so many of the levers below sit at the state level. Learn more: acf.gov/ofa/programs/tanf.

• As a Maryland voter: raise the issue with your elected officials, support local marriage and fatherhood programs, share rigorous data like the studies above, and vote for candidates who treat family stability as a child-wellbeing issue rather than a partisan one.

• As a Maryland state delegate: sponsor bills that lengthen benefit phase-outs so marriage does not trigger a sudden loss of aid, and fund state programs that strengthen families, since states run their own TANF programs and set most family-policy rules.
• As a Maryland state senator:use your chamber to move those bills, hold hearings on how your state’s welfare rules treat married couples, and require your state agencies to link and evaluate their own data so you can see what actually works.
• As the Maryland governor: direct your state human-services agency to remove marriage penalties in TANF, invest in linked administrative data, and apply for federal waivers or grants to pilot and rigorously evaluate family-stability programs.

Beyond Maryland (federal)

Look up federal bills and filter by policy area such as TANF or welfare at the official site: congress.gov/search.

• As a member of the US House for Maryland:shape the federal TANF reauthorization, since the program’s rules flow from Congress, and push for funding tied to real data collection and evaluation. The relevant body is the House Ways and Means Subcommittee on Work and Welfare, which holds jurisdiction over TANF.
• As a US senator for Maryland: introduce or co-sponsor TANF reauthorization bills that strip out marriage penalties, attach requirements that funded programs collect and link real outcome data, and use your seat on the Senate Finance Committee (which oversees TANF, child support, and the Administration for Children and Families) to hold hearings and press agencies for evidence on what works.
• The congressional committees that own this: the House Ways and Means Subcommittee on Work and Welfare and the Senate Finance Committee write and reauthorize TANF and related family programs, so they are where marriage-penalty fixes and data mandates ultimately pass.
• The federal agencies already doing this work: within the Department of Health and Human Services, the Administration for Children and Families runs TANF and the Healthy Marriage and Responsible Fatherhood grants, its Office of Planning, Research, and Evaluation evaluates these programs, and the US Census Bureau produced the linked-data study cited above. These are the agencies to fund, task, and hold accountable for measuring what works.