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An occupant sits inside a subdivided residential unit, known as a "coffin home", located inside a building in Hong Kong, China, on Tuesday, June 13, 2017. Hong Kong, a city of soaring skyscrapers and glittering luxury boutiques, has become perhaps the epitome of income inequality in the developed world. Housing is the least affordable in the world, according to housing-policy think tank Demographia. Photographer: Paul Yeung/Bloomberg via Getty Images

An occupant sits inside a subdivided residential unit, known as a "coffin home", located inside a building in Hong Kong, China, on Tuesday, June 13, 2017. Hong Kong, a city of soaring skyscrapers and glittering luxury boutiques, has become perhaps the epitome of income inequality in the developed world. Housing is the least affordable in the world, according to housing-policy think tank Demographia. Photographer: Paul Yeung/Bloomberg via Getty Images