This paper uses a new dataset on Internet flows between cities around the world to study whether electronic communication and face-to-face contacts are substitutes or complements. In order to test these competing hypotheses I estimate a regression of bilateral Internet traffic on physical...

This paper studies the impact of physical distance and different relational proximity types on the formation of the Internet infrastructure. Although there is some anecdotal evidence on the 'end of geography' effect of the Internet, the relationship between physical space and the Internet has...

The majority of cities in our world is not only connected through conventional physical infrastructure, but increasingly through modern digital infrastructure. This paper aims to test whether digital connectivity leads to other linkage patterns among world cities than traditional infrastructure....

This discussion paper led to an article in <I>Papers in Regional Science</I> (2014). Volume 93, Issue 2(SI).<P> The majority of cities in our world is not only connected through conventional physical infrastructure, but increasingly through modern digital infrastructure. This paper aims to test whether...</p></i>

This discussion paper resulted in an article in the <I>Journal of Regional Science</I> (2013). Volume 53, Issue 5(SI), pages 855-873.<P> This paper studies the impact of physical distance and different relational proximity types on the formation of the Internet infrastructure. Although there is some...</p></i>