Countries trade with a world market, so the model does not consider differentiated bilateral trade (i.e. maize from Mexico is the same as maize from South Africa). The combined group of OECD countries is also projected to have a larger population compared to 2010, except in a few EU countries, as well as in Japan and Korea, where populations are forecast to fall. Overall, GDP in OECD countries is expected to almost double, and global GDP is expected to increase two-and-a-half times between 2010 and 2050. There is some progress towards achieving development goals, reducing resource and energy intensity, and decreasing fossil fuel dependency.