If you live in a city, your chances of being involved victim of a criminal act go up, and as cities grow in size, crime grows even faster.
But not all crimes go up at the same rate. Rape grows only linearly, at roughly the same pace as a city's population, while car theft and robbery compound and outpace the population.
A new mathematical model says the same underlying mechanism that boosts urban innovation and startup businesses can also explain why certain types of crimes thrive in a larger population.