A Goldman Sachs paper published later in December 2005 explained why Mexico and South Korea were not included in the original BRICs. According to the paper, among the other countries they looked at, only Mexico and South Korea have the potential to rival the BRICs, but they are economies that they decided to exclude initially because they looked to them as already more developed. However, due to the popularity of the Goldman Sachs thesis, "BRIMC" and "BRICK" are becoming more generic marketing terms to refer to these six countries.