Similar work has been done, but I dont think to the right extent. Many, lets say liberal, scientists also dismiss the work. Actually I think liberal scientists have pretty solidly proven that race exists and there are ethnic groups with genetic differences.    The genetic difference possessed by ethnic groups in Africa is astonishing. They possess absurd genetic diversity. For examples, the differences between two african sub populations can be greater than the differences between whites and asians.    With the advent of large databases of highly redundant full human genomes I think the race picture will become more clear.    In fact all these genome databases are free and online. If you wanted to study race comparisons you could pick certain traits to focus on and then look for changes among ethnic groups.    Good luck on your studies!