It ranks countries based on their performance and details the challenges and opportunities that advanced economies face in achieving global commitments to children. (educationmattersmag.com.au)
For the rest of the world on a country by country basis, membership is open until such time as there is organized real estate in your country. (iciworld.com)
I suspect this is because these publishers are trying to maintain their old rights model, with sales and revenues managed on a per country basis. (jwikert.typepad.com)