Effects of New York state paid family leave on early immunizations

Objective: To test whether introduction of New York Paid Family Leave (NY PFL) in 2018 is associated with the timeliness of immunizations among infants whose mothers reside in NY in one of the 57 counties outside of New York City (NYC).

Methods: We use difference-in-difference methods, comparing immunization outcomes before and after NY PFL went into effect among infants born to mothers who were employed during pregnancy, and thus likely to be affected by NY PFL, vs. mothers who were not employed during pregnancy and thus unlikely to be affected. Data come from two administrative sources: (1) NYS Vital Statistics birth data; and (2) the NYS Immunization Information System (NYSIIS).

Results: Our findings suggest that NY PFL is associated with small increases in the probability that firstborn infants have had all immunizations on time at the ages of two and four months. We do not find statistically significant effects of NY PFL on immunization outcomes among higher birth order children.

Conclusions: Our findings suggest that NY PFL led to small improvements in the timeliness of early immunizations among firstborn infants.