References

Bryan, Jennifer, Jim Hester, and STAT 545 TAs. 2020. “Happy Git with r.” https://happygitwithr.com/.
Silva, JMC Santos, and Silvana Tenreyro. 2006. “The Log of Gravity.” The Review of Economics and Statistics 88 (4): 641–58.
Wickham, Hadley, and Garrett Grolemund. 2016. R for Data Science: Import, Tidy, Transform, Visualize, and Model Data. " O’Reilly Media, Inc.".
Yotov, Yoto V, Roberta Piermartini, José-Antonio Monteiro, and Mario Larch. 2016. An Advanced Guide to Trade Policy Analysis: The Structural Gravity Model. World Trade Organization Geneva.
Zumel, Nina. 2014. “Trimming the Fat from Glm() Models in r.” https://win-vector.com/2014/05/30/trimming-the-fat-from-glm-models-in-r/.