It may involve illegal liquor, prostitution, tax-cheating unlicensed taxis, it may be petty shoplifting or worse, but it's on the Dirty Boulevards where young men like Kama, Mucina and Boniface hang out that real change is often happening.

BBC: Nairobi's motorbike boys improving their own slum

Officials estimate that around 55% of all Cuban households now have access to dollars, either from legal work, such as self-employment or bonuses, from remittances from relations in the United States, or from a host of illegal or unregistered jobs, ranging from prostitution to driving taxis and guiding tourists.

ECONOMIST: Cuba��s economy