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.
