https://pubs.aeaweb.org/doi/pdfplus/10.1257/jep.34.4.105
https://towardsdatascience.com/a-thousand-gadgets-my-thoughts-on-the-r-tidyverse-2441d8504433
https://www.hamiltonproject.org/assets/files/Environmental_Facts_FINAL.pdf
https://towardsdatascience.com/model-selection-101-using-r-c8437b5f9f99