@article{fredriksson_oliveira_2019,  title={Impact evaluation using Difference-in-Differences},  volume={54},  ISSN={2531-0488},  url={https://doi.org/10.1108/RAUSP-05-2019-0112},  DOI={10.1108/RAUSP-05-2019-0112},  number={4},  journal={RAUSP Management Journal},  publisher={Universidade de São Paulo},  author={Fredriksson, Anders and Oliveira, Gustavo Magalhães de},  year={2019},  month={Oct},  pages={519–532} }