East Germans vote similar to other East Euros: tho they have few immigrant probs, they don't want any more. https://www.bloomberg.com/graphics/2017-germany-post-election-analysis …pic.twitter.com/QY1GdALP93
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So, you propose non-linear effects of diversity. Very well. Here you go. Also no non-linear effects to be seen. http://rpubs.com/EmilOWK/262410