Regions that expelled the Jews have lower GDP than those that didn't

From RRW

Kicking Medieval Jews out of Europe damaged the economy...and the effects are still seen TODAY: Regions that expelled them have lower GDP than those that didn't

http://www.dailymail.co.uk/sciencetech/article-3484434/Kicking-Medieval-Jews-Europe-damaged-economy-effects-seen-TODAY-Regions-expelled-lower-GDP-didn-t.html