Selected State Substantive and Preemptive Laws 2009-2018, United States

The Selected State Preemptive Laws Dataset (SSPLD) was developed to study trends in preemption laws across states from 2009-2018. Researchers selected four domains where states and localities had enacted substantive and preemptive laws: (1) Paid sick days, (2) food, (3) tobacco, and (4) firearms. For three of these domains (sick days, food, and tobacco), state substantive laws are also included in this dataset for each of the policy topics included in the domain.

选定州级优先性法律数据集（Selected State Preemptive Laws Dataset, SSPLD）旨在探究2009年至2018年间各州优先性法律的发展态势。研究人员选取了州与地方均已制定实体性及优先性法律的四大领域：（1）带薪病假，（2）食品，（3）烟草，（4）枪支。针对其中三个领域（带薪病假、食品及烟草），本数据集同时纳入了对应政策主题的州级实体性法律。