Over the last decade, the meteoric rise of ridesourcing services like Uber and Lyft have transformed the urban landscape, affecting travel patterns, car ownership, and congestion, and more broadly, the economy, the environment, and equity.

The ways in which Uber and Lyft are redefining mobility is the focus of a new policy brief series, ” Uber and Lyft in U.S. Cities: Findings and Recommendations from Carnegie Mellon University Research on Transportation Network Companies (TNCs).”

The brief series, a compilation of studies conducted by Jeremy Michalek, the lead author, and other Carnegie Mellon Engineering researchers, delves into the implications and opportunities that TNCs present…

On the plus side, the researchers found that TNCs have increased economic growth, employment, and wages for intermittent jobs in U.S. cities.

“However, Uber and Lyft affect different kinds of cities differently, and that is important to understanding their impact,” explains Michalek.