Berlin was once one of the most affordable cities to live in until it garnered popularity, and now it's teaching other cities how to maintain that affordability.

The difference between Berlin and other major cities is Berlin is changing its high rent prices to accommodate the cities poorer residents. Starting next year, a new law will go into effect that will reverse public housing from being too high for certain residents. 

The law has come about, 
says local newspaper the Berliner Zeitung, because the companies that administer public housing are often charging more than the regular private market.

This change won’t have a direct effect on city-wide rent rises, but it does apply to tenants of privately-owned "public" apartments, so they won’t get priced out of the market.

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