The size of the economy that thrives without a roof in Benglur is any body's guess. But if you happen to go the narrow streets around Chicklalbag, you will find the footpaths and the local playground filled with yellow sieves being dried in the sun. You will also find the people who make them (mostly women). These sieves are woven, coated with a turmeric paste to cover the gaps, dried in the sun and then dispatched to the markets. They are also sold to people who travel the city streets selling door-to-door. Who needs a roof?
A link from Dhaka, Bangladesh: Lost Professions of Old Dhaka.