It is the first thing on everyone’s Pakistan presentation—its 250-million…

In 1959, Fidel Castro imposed a ban on the sale of residential property in Cuba. For more than fifty years after this decision was made, the only way that Cubans could move was to exchange properties on the basis of similarity. A new property should not be different from the old one in terms of square footage or style. And even if a family had the need to expand their living space and, more importantly, the means to do so, it would not have been legally possible. At the same time, other families could have housing that was too large for their needs. For example, childless families or older couples might prefer to live in a modestly sized apartment, but the paradox was that this exchange was impossible. In addition, according to one unofficial estimate, by 2011 there were about 200,000 units of vacant housing on the island, despite the fact that about a third of Cubans had to squeeze into a few square meters of living space each. According to the 2012 census, the Cuban population (11.2 million) lives in 3.9 million housing units, meaning that there is an average of 2.8 inhabitants per unit.