Come esiste un indice che valuta il rapporto del tasso di cambio tra le monete sulla base del costo di un Big Mac, così esiste una correlazione tra la costruzione di grattacieli e le crisi finanziarie.
E' il Barclays Capital's Skyscraper Index.
There is an "unhealthy correlation" between the building of skyscrapers and subsequent financial crashes, according to Barclays Capital.
Examples include the Empire State building, built as the Great Depression was under way, and the current world's tallest, the Burj Khalifa, built just before Dubai almost went bust.
China is currently the biggest builder of skyscrapers, the bank said.
India also has 14 skyscrapers under construction.