Why do parents with limited income spend less time than their advantaged counterparts on educational activities with their children? One explanation from the literature is that financial scarcity imposes a “bandwidth tax” on parents’ executive function. In this paper, Ariel Kalil and Mauricio Koechlin expand on this idea and explore what, concretely, holds parents back. They test two questions: First, is the binding constraint attention (the ability to focus amid competing demands) or self-control (the ability to act on long-term intentions)? Second, are these cognitive costs driven by material deprivation — having low income — or by the subjective psychology of not having enough?
To test these questions, the authors survey 1,932 mothers with kindergartners in Chicago Public Schools, asking participants: “Sometimes, even if parents want to, things get in the way of their reading to their child. In the last week, how often did the following things get in the way of your reading to [child]?” Parents rated four barriers — being too tired, too busy, wanting to do something else, and not being able to find a quiet place — on a four-point frequency scale: everyday, 3 or more days, 1 or 2 days, or never. The authors collapse these answers into a binary indicator equal to 1 if the parent reported the barrier on at least one day. They also survey parents about their child’s school quality, their neighborhood’s safety, and the quality of their home internet access in order to capture structural constraints and serve as placebo tests.
The authors then test which cognitive and economic factors predict these barriers. They capture attention by asking how often parents find it easy to concentrate, are easily distracted, and can sustain focus for long periods; self-control using four incentivized choices between a smaller payment now and a larger payment later, with parents classified as “present-biased” if they chose the immediate option in the near term but the patient option for the same one-month delay a year out; and felt scarcity by a single question asking whether, at the end of the month, the parent has money left over, just enough to make ends meet, or not enough. The authors measure household income separately in dollars.
For each reported barrier to reading (being too tired, too busy, wanting to do something else, and not being able to find a quiet place), the authors test its association with attention, present bias, felt scarcity, and household income. They find the following:
- Attentional capacity — not self-control — is the primary constraint. Lower scores on the Attention Index predict higher probabilities of the four reported barriers. This correlation holds even controlling for factors like mothers’ agency and growth mindset. A one-standard-deviation improvement in self-reported attentional capacity reduces the probability of reporting each barrier by 6 to 10 percentage points: being too tired (–10 points), being too busy (–8), wanting to do something else (–7), and not finding a quiet place (–6). Present bias, by contrast, is essentially uncorrelated with the outcomes.
- These attentional deficits are driven by felt scarcity rather than actual household income. The scarcity coefficient on the Attention Index persists when income is controlled, whereas income shows no independent association with attention. The mirror image holds for self-control: income is a robust correlate of present bias, while scarcity drops out once income is included. Felt scarcity and household income thus identify two distinct cognitive pathways through which financial disadvantage shapes parental cognition.
The findings reframe what holds low-income parents back: not weak motivation or poor planning, but cognitive resources captured by the felt experience of not having enough. This points toward interventions that lessen cognitive demands rather than try to motivate parents who already want to invest more in their children — well-timed text-message reminders, for example, work because they capture attention in the moment rather than asking parents to push through the bottleneck. More broadly, policies that ease the day-to-day cognitive load of financial precarity may carry developmental returns for children that go beyond the dollars they deliver.