Hi all,
This report on the ranking of the happiest countries seems interesting. It has connections to several topics, including mental health, sustainability, and big data. One of the writers, Jeffery Sachs, is an influential economist and the writer of the highly cited book 'The end of poverty'.
Link for the 2019 version of the report: https://s3.amazonaws.com/happiness-report/2019/WHR19.pdf