Resources per person in the form of GDP per capita has been included in an article by The Guardian published during the 2012 Summer Olympics[30] and again by Google's News Lab for the Rio 2016 games.[31][32] Already in 2002, the research done by Meghan Busse of Northwestern University suggested that both a large population and high per capita GDP are needed to generate high medal totals,[33] and predictive models have been built trying to predict success with multivariate analysis, taking also past results and host-nation advantage into account.[34][35][36]