Governments trying to raise fertility face a more complicated task than governments trying to lower it. A check cannot create a spouse or restore ten postponed years, but money can matter when it is the constraint close to a child’s arrival. The right question is therefore which bottleneck a policy addresses and which rung changes afterward: family welfare and distribution; intended or wanted fertility; timing; additional live births; completed cohort fertility; age structure; or durable replacement. Replacement is a higher bar, and failure to reach it does not make a useful family policy a failure.
Cash and tax policy
Cash is the most direct instrument. Quebec’s Allowance for Newborn Children, which operated from 1988 to 1997 and paid more for later births, increased births among eligible families in Milligan’s study. The result is a useful parity-specific response, not proof of a permanent increase in completed family size: some births may have been brought forward. The cost was a taxpayer-funded transfer; incidence depended on eligibility and on whether payments were inframarginal to families already planning a birth. A large incentive can change a close decision, while a small one may mainly reward a decision already made.
Tax credits and child allowances can reduce poverty and improve household security even when their fertility effect is small. They may also favor families with taxable income, formal employment, or a particular marital status unless designed otherwise. The strongest case for them is cumulative: modest completed-fertility gains repeated across many families can be policy-relevant without approaching replacement. The skeptical case is that selection, anticipation, and timing can make a period-TFR rise look larger than the cohort effect.
Housing and household formation
Housing reaches an earlier threshold than childcare. A couple that cannot establish an independent home may postpone partnership or a first child. A subsidized loan, rent support, or larger public apartment can therefore change timing and possibly quantum when housing is the binding constraint. The cost is public expenditure or foregone revenue, and the incidence is not neutral: where supply is scarce, broad subsidies can capitalize into prices and transfer money to existing owners. A credible evaluation must compare eligible and ineligible households or another counterfactual, not infer births from a national housing boom.
Housing support also has non-fertility benefits: less crowding, greater stability, and a better chance that children can remain in one home. It does not follow that a housing policy should prescribe marriage, co-residence, or one family form. Support can recognize unmarried parents and children while still helping couples who want to form a household.
Leave, childcare, and work rules
Paid leave protects the moment when infant care collides with work. Leave that replaces enough income and preserves a job can improve maternal health, job retention, and time security while making a first or subsequent birth more feasible. Employers, social insurance, and taxpayers share the cost in different systems; the burden can fall on payrolls, workers, or firms, and the benefit depends on take-up and legal coverage. Very short leave can force an early return; very long, poorly paid leave can weaken a parent’s position at work.
Childcare reaches a later bottleneck. Once children exist, reliable care can make another birth feasible for parents who need or want two jobs. OECD panel analyses find positive associations between spending on early-childhood care, leave, family allowances, and fertility, but these are not random assignments: countries that spend more may also have different labor markets, housing, gender norms, and partnership patterns. Effects therefore vary with supply, quality, price, and take-up. Childcare can improve child development, care equity, and a family’s ordinary week even when no additional child follows.
Public support should not quietly prescribe where care happens. A childcare place may be exactly what one family needs; another may prefer resources that let a parent remain home. Tax rules and benefits can recognize either arrangement, though every design distributes money and recognition differently. Purchased care is not the only productive form of care.
The strongest case and the skeptical case
The strongest policy case is compatibility: remove a concrete financial, housing, time, or care constraint, protect people who choose a child, and let small effects accumulate across a large population. Such policies can improve welfare, reduce child poverty, protect health and employment, and possibly raise wanted and completed fertility. A policy can be worth keeping even when a country remains below replacement.
The strongest skeptical case is identification. A period-TFR increase may be tempo recovery rather than additional completed births; eligible families may differ from ineligible families; governments may expand benefits when fertility is already changing; and national births can fall because the parental cohort is shrinking even when exposed families benefit. A national association is not a treatment effect, and a treatment effect is not durable reversal without long-run cohort follow-up.
The fair verdict is consequently narrower than either optimism or dismissal. Family policy works when it reaches the constraint that is actually binding, and its welfare gains should be counted directly. To call it durable reversal would require persistent completed-cohort gains, broad take-up, manageable cost and incidence, and improvement in the succeeding age structure. A TFR spike without cohort follow-up is tempo recovery, not reversal. A credible long-run design could qualify even while fertility remained below replacement.
Citations
- Kevin Milligan, “Subsidizing the Stork: New Evidence on Tax Incentives and Fertility”, Review of Economics and Statistics 87, no. 3, 2005.
- Lyman Stone, Pro-Natal Policies Work, But They Come With a Hefty Price Tag, Institute for Family Studies, 2020.
- Jonas Fluchtmann, Violetta van Veen, and Willem Adema, “Fertility, Employment and Family Policy”, OECD Social, Employment and Migration Working Papers no. 299, 2023.
- Organisation for Economic Co-operation and Development, “Fertility trends across the OECD: Underlying drivers and the role for policy”, 2024.
- Gordon B. Dahl and others, “What Is the Case for Paid Maternity Leave?”, Review of Economics and Statistics 98, no. 4, 2016.