Since the introduction of the iPhone in 2007, smartphones have become an integrated part of human life. Smartphones are excellent tools that help us access information, coordinate journeys, connect with friends and family, and much, much more. However, in parallel with the proliferation of...

Social interactions are considered pivotal to urban agglomeration forces. This study employs a unique dataset on mobile phone calls to examine how social interactions differ across cities and peripheral areas. We first show that geographical distance is highly detrimental to interpersonal...