https://www.sciencedaily.com/releases/2020/02/200213160053.htm

"These two dimensions, time and population size, need to be treated separately because they express different phenomena," says Luís Bettencourt, an external professor at the Santa Fe Institute and director of the University of Chicago's Mansueto Institute for Urban Innovation. "We need both of them to make sense of what is happening in a complex system like a city."

New work, led by Bettencourt, maps out the common ground between these two approaches. In a paper published this week in the Journal of the Royal Society Interface, the authors argue that while the two methodologies measure different mixtures of the same phenomena, they can be used together to reveal new insights about a city's behavior.