Smoking during pregnancy, which causes maternal, fetal, and infant morbidity and mortality, is a major public health concern. Many countries around the world have recently tightened age-based purchase restriction policies as a tobacco control measure. In December 2019, the minimum legal sales age for tobacco products in the United States was raised from 18 to 21 years as a way of preventing smoking initiation. Vidhura Tennekoon, an Assistant Professor of Economics in the IU School of Liberal Arts at IUPUI, has first studied the effects of purchase restrictions on smoking during different stages of pregnancy covering the entire United States and using the records of all live births during 2014–2018 by birthing people aged 18–21 years. The results show that purchase restrictions are highly effective in preventing smoking among birthing people in the 18–21 years age group. Click here to read the article, published online before the print version of the journal Nicotine & Tobacco Research.