Chapter 15 Data Sources
15.1 For teaching
https://github.com/rfordatascience/tidytuesday
http://history-lab.org/analytics
http://www.uqac.ca/portfolio/vincentarnaud/uqac-et-google-trends-une-exploration/ and https://www.researchgate.net/publication/267269093_The_Use_of_Google_Trends_in_Health_Care_Research_A_Systematic_Review