Id21, published by the Institute of Development Studies of the UK's University of Sussex, has a spate of articles devoted to property ownership in the developing world.
Here are some representative quotes: "The value of properties in Black Townships is currently estimated at 68.3 billion Rand. These properties could provide significant collateral for low income households to secure credit for a range of business uses."
"Governments should provide at least short-term security to residents in informal settlements and, in the vast majority of cases, cease to evict settlers and demolish houses."
"Urban poor people are using systems that better suit their needs than the formal alternatives."
As you can see, these essays argue diverse position. But the research and conclusions are always interesting.