I know that this post is basically a marketing plug for Kanbanchi, but the article, from an statistical perspective, is severely wrong.

Other than the usual warning that "correlation does not imply causation", putting Luxembourg in the dataset makes me cringe: Luxembourg's economy is based on Taxes[1] ala Tax haven, which, for this purpose, is like passive incoming for the whole population. There was an scandal here in Europe about this not so long ago[2]

[1] https://en.wikipedia.org/wiki/Economy_of_Luxembourg

In 2013 the GDP was $60.54 billion of which services, including the financial sector, produced 86%. The financial sector comprised 36% of GDP, industry comprised 13.3% and agriculture only 0.3%

[2] https://www.theguardian.com/business/2014/nov/05/-sp-luxembo...

Through a lot of trial and error I have found that doing actual work increases productivity more than anything else!