“…We censored births between March 1, 2014, and May 31, 2014, so that all selected pregnant women were exposed to the reform for at least 3 months (one trimester of pregnancy), and we consequently implemented a sharp RDD. 30 We matched the chosen time window after policy implementation (June 1, 2014, to Feb 28, 2015), to the time window before policy implementation (June 1, 2013, to Feb 28, 2014), to provide a comparison robust to month and seasonal variations. Finally, these analyses accounted for other underlying temporal trends and potential time-variant factors affecting the outcomes by comparing the period surrounding the policy implementation in 2014 to the same time periods in 2012, 2016, and 2018, when there was no policy enacted.…”