"Open sourcing social solutions". I loved it since I first heard of it about 18 months ago while I was booking tickets, packing bags and spending long hours understanding "who was who" in this fascinating and rapidly changing base of the pyramid space.

I learned about it from Changemakers (most likely via NextBillion.net), an initiative of Ashoka whose idea competitions open the door for a very interesting dynamic of feedback and model refining between different stakeholders involved in this space.

After hosting competitions in areas as diverse as healthcare, water and tourism, Changemakers.net has naturally become an obliged stop for anyone interested in identifying, learning about and getting in contact with innovative and entrepreneurial solutions to social challenges. Previous competitions have been highlighted in NextBillion.net in the past, and this year's "Banking on Social Change - Seeking Financial Solutions for All" competition is no exception. Following is Changemakers and Citi's introduction to the competition.

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