Seeing fewer babies is a major reason why people are having fewer babies.
April 17, 2026
Original Paper
The Empathy Channel in Fertility
SSRN · 6463162
The Takeaway
We usually look at housing costs or career timing to explain falling birth rates, but this study points to a biological feedback loop. Being around infants actually triggers neurobiological mechanisms that make people want to become parents. Because there are fewer babies in our social circles than ever before, that 'empathy channel' isn't being activated, leading to a further decline in the desire for kids. It’s a self-reinforcing cycle where the absence of children makes society less interested in having them. For regular people, it means our 'choice' to remain childless might be influenced by a social environment that has simply run out of babies to show us.
From the abstract
Being around babies makes people want babies. We formalize this observation as the empathy channel: exposure to infants in the social environment activates neurobiological mechanisms that increase the desire for parenthood. As fertility declines and children become scarcer, this affective stimulus weakens, further eroding the motivation to have children. We embed the mechanism in a two-group overlapping-generations quantity-quality model that admits closed-form solutions and nests the standard f