Making Children
Money or Time? Heterogeneous Effects of Unconditional Cash on Parental Investments
Hema Shah et al.
NBER Working Paper, May 2025
Abstract:
Household time and money allocations in response to income support programs vary across diverse family circumstances and preferences, yet such heterogeneous responses are not well understood. Using data from a large-scale, multisite, U.S.-based randomized controlled study, we examine heterogeneity in the effects of a monthly unconditional cash transfer on monetary and time investments in children. This study offers a novel opportunity to examine heterogeneous effects of a cash transfer by race and ethnicity, where receipt is independent of eligibility based on other demographic characteristics. The effects of the cash transfer on net household income, earnings, and household expenditures were similar for families irrespective of race or ethnicity, even given initial differences in family structure, government benefit receipt, and employment. However, effects on monetary and time investments in children differed. Latino families' child-focused expenditures increased, equivalent to nearly one-third of the cash transfer, with no effect on maternal employment or time spent with children. Among Black families, maternal work hours decreased and time spent with children on early learning activities increased, with no effect on child-focused expenditures. Marginal propensities to consume child-specific goods from different income sources also varied: Estimates showed a higher marginal propensity to consume child-specific goods from government income than from maternal income among Latino families, and the opposite among Black families. Latino families' responses to the unconditional cash transfer and to government income are consistent with the notion that signals regarding intended use of income influence spending decisions.
Does Cutting Child Benefits Reduce Fertility in Larger Families? Evidence from the UK's Two-Child Limit
Mary Reader, Jonathan Portes & Ruth Patrick
Population Research and Policy Review, March 2025
Abstract:
We study the fertility effects of restricting child-related social assistance to the first two children in the family. As of 2017, all third and subsequent children born on or after 6 April 2017 in the UK were made ineligible for approximately 3000 GBP of means-tested child benefits per year. Using a triple difference and regression discontinuity design, we leverage administrative births microdata to identify the impact of the two-child limit on higher-order births. We find little to no decline in higher-order fertility among low-income families, with our estimates indicating at most small elasticities relative to the literature.
The effect of New York State's Paid Family and Medical Leave Program on birth outcomes
Katherine Engel & Taryn Morrissey
Economics & Human Biology, May 2025
Abstract:
Paid Family and Medical Leave (PFML) programs provide material resources and time away from the labor force around the time of a child's birth. Past research indicates that the programs improve maternal and child health and may increase fertility. To date, 13 states and the District of Columbia have passed PFML laws, with varying lengths of leave, eligibility, job protections, and benefit levels. Programs in states other than California remain understudied. We examined the effects of New York State's (NYS) PFML program on birth outcomes using difference-in-differences (DiD) models with data from the Centers for Disease and Prevention National Vital Statistics System (NVSS) on the universe of U.S. births from 2013 to 2019. We compared trends in multiple measures of birthweight and gestational age at birth between NYS and states lacking PFML benefits during this time period, exploring mechanisms and how markers of disadvantage moderate effects. Results indicate that NYS's PFML program led to small decreases in gestational age and birthweight. We also find evidence that the program increased fertility, partially via reductions in fetal deaths. Findings suggest that PFML may increase live births, with these additional infants driving the observed declines in birth outcomes.
Does Marriage Still Make a Difference in Infant Health?
Ji Yan
Eastern Economic Journal, April 2025, Pages 246-267
Abstract:
Although a vast literature examines the effects of family structure on school-aged children, adolescents and adults, less attention has been paid to infants. We use a longitudinal sample to disentangle the marriage effects from unobserved fixed characteristics of the mother and various observed confounders. Results from standard cross-sectional regressions tend to overstate the marriage premium. The within-mother analysis shows marriage leads to a small increase in birth weight but still fairly large declines in the risks of low birth weight and small for gestational age. Abstaining from smoking and having early prenatal care help explain how marriage improves infant health.
Twins and virtual twins: Comparative analysis of problem behaviors
Nancy Segal, Tony Xing Tan & Elizabeth Pratt-Thompson
Journal of Experimental Child Psychology, August 2025
Abstract:
A study of factors affecting children's problem behaviors using two unique sibships, monozygotic twins adopted together from China (MZ-CTT twins) and virtual twins (same-age unrelated siblings reared together; VTs), is presented. MZ-CTT twins share genes and environments, whereas VTs share environments only, allowing assessment of how these factors influence behavioral difficulties. Participants (MZ-CTT: n = 43 pairs; VT: n = 41 pairs) were in ongoing studies of behavioral development at the Twin Studies Center at California State University, Fullerton. Mean ages were 7.00 years (SD = 2.59) for MZ-CTT pairs and 6.24 years (SD = 2.26) for VT pairs; MZ-CTT pairs were significantly (albeit only slightly) older. Parents completed demographic surveys and the Child Behavior Checklist for each child. The greater resemblance of age- and sex-corrected t scores of MZ-CTT pairs across Internalizing, Externalizing, and Total problem behavior scales (ris = .72, .71, and .77, respectively) compared with VT pair scores (ris = .25, .40, and .63, respectively) demonstrates genetic influence on these measures. VT pairs with a biological child and an adoptee showed greater resemblance than those with two adoptees. This probably reflects the correlation of biological children's genotype with the adoptees' environment. Regression analyses revealed that for MZ-CTT pairs less variance in problem behaviors was explained by parental variables, such as maternal education, relative to VT pairs. This result may speak to the greater heterogeneity of the backgrounds of VT participants. In summary, this study of two unique kinships shows that both genetic and environmental factors influence child behavioral problems. Future studies using novel and informative kinships are warranted.
In one ear and out the other: Verbal reminders do not improve young children's prospective memory performance on a virtual task
Madeline Maguire & Caitlin Mahy
Journal of Experimental Child Psychology, August 2025
Abstract:
Prospective memory (PM), or remembering to carry out future intentions, is an ability with which young children often struggle. Thus, it is crucial to determine how to best support the development of their PM skills. Reminders are often used to support PM, and previous research has found that reminders referencing both the PM cue and intended action can improve children's and adults' PM. To date, no studies have investigated the effect of verbal cue and action reminders on preschool children's PM performance, a gap the current study intended to fill. A total of 88 North American children aged 3 to 6 years completed a PM task virtually. The PM task required children to interrupt a card-sorting task to wave at specific cards (those depicting elephants). Children were randomly assigned to receive one of the following: (a) three cue-action reminders, which referenced the PM cue (the elephants) and the intended action (waving); (b) three cue-only reminders, which referenced only the PM cue; (c) three action-only reminders, which referenced only the intended action; or (d) three irrelevant control reminders. The only significant predictor of PM performance was age, which became nonsignificant when the interaction terms were added in the model. Reminders did not have an effect on children's PM. We consider how these findings may lend support to theories of PM development and discuss the implications of using verbal reminders to support children's PM in everyday contexts.
Learning Science and Engineering From Videos and Games: A Randomized Trial of PBS KIDS The Cat in the Hat Knows a Lot About That!
Megan Silander et al.
Educational Researcher, forthcoming
Abstract:
Preschool-age children receive little formal instruction regarding science and engineering concepts. Digital media interventions have been effective in supporting young children's literacy and mathematics skills, but there is little evidence of their efficacy in building science and engineering skills. This article reports on an experimental study of the impact of access to science- and engineering-focused games and videos on the knowledge and skills of 4- and 5-year-old children. The intervention led to statistically significant positive impacts on children's understanding of structure stability (d = 0.40, p < .001) and the relationship between material properties, force, and movement (d = 0.38, p < .01). These results provide causal evidence that digital media can support young children's science learning.