Noisy tourists are putting a strain on Berlin's rental market.
While New York clings firmly to its system of rent control, London's housing market has changed too much to re-introduce them.
Why putting a price ceiling on rent is not the answer to a city's housing problems.
Sure, a chunk of Stuyvesant Town's units will remain affordable for 20 years. But what happens after that?
Miliband's plans to stop landlords hiking up rents won't fix the housing supply problem.