With regard to Asian overrepresentation and Latino/Hispanic underrepresentation, I think there's a really good chance that how those respective immigrant groups came to be in the United States probably has a large role to play in this disparity. East and South Asian immigrants have to cross an ocean to get here, whereas most Latino/Hispanic immigrants could cross a land border (on foot in many cases!). The disparity in wealth required to pursue these alternate immigration paths probably significantly skews the class mixture of these groups and, thus, their representation in white collar professions.