http://www.globalincome.org/English/BI-worldwide.html covers the tests - not unbiased but has useful facts and data on where to get more info.
The permanent income hypothesis was formulated by the Nobel Prize winning economist Milton Friedman in 1957 and can be read in his Book [2].
Just as an understatement, you can see which country has the highest backing of entrepreneurial activity [3].
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[1] http://wrap.warwick.ac.uk/888/1/WRAP_Cunliffe_basic.pdf
[2] http://papers.nber.org/books/frie57-1
[3] http://thumbnails.visually.netdna-cdn.com/which-country-back... and http://www.internationalentrepreneurship.com/total-entrepren...
http://www.globalincome.org/English/BI-worldwide.html covers the tests - not unbiased but has useful facts and data on where to get more info.