Robin Edwards calls attention to a new set of statistical areas developed by the Uk Office of National Statistics to report workplace data from the 2011 Census, called Workplace Zones. He has made some nice maps that give a glimpse of the potential these areas can have to urban and transport studies. If only we had these data when we were writing this paper. :(
Related Link: The U.S Census Bureau has made available an online mapping tool that displays demographic info of states, counties, and census tracts. It`s called Census Explorer and it also presents some data on retail and a commuting edition for 1990-2000-2012.