We investigate the effects of mobile-sourced ridesharing via platforms like Uber, Lyft, and Didi Chuxing on the use of public transit systems. Our study uses trip-level data about Uber usage in New York City, turnstile data about subway usage, and trip-level data about taxicab and shared bike usage. We find that on the surface, ridesharing and subway usage are positively correlated. Exploiting ...

In recent years, what has become known as collaborative consumption has undergone rapid expansion through peer-to-peer (P2P) platforms. In the field of tourism, a particularly notable example is that of Airbnb, a service that puts travellers in contact with hosts for the purposes of renting accommodation, either rooms or entire homes/apartments. Although Airbnb may bring benefits to cities in t...

Immigration and the Political Economy of Public Education: Recent Perspectives This paper reviews the recent literature on the effects of immigration on the public education of the host country, emphasizing the political economy implications. In particular, we are interested on what happens to enrollment in public schools and the quality of education in these schools. Our review of the literatu...

Despite a recent burst of research, knowledge on c-di-GMP signaling pathways remains largely fragmentary and molecular mechanisms of regulation and even c-di-GMP targets are yet unknown for most bacteria. Besides genomics or bioinformatics, accompanying alternative approaches are necessary to reveal c-di-GMP regulation in bacteria with complex lifestyles. We have approached this study by artifi...

We propose a general model of monopolistic competition, which encompasses existing models while being flexible enough to take into account new demand and competition features. The basic tool we use to study the market outcome is the elasticity of substitution at a symmetric consumption pattern, which depends on both the per capita consumption and the total mass of varieties. We impose intuitive...

Mobile Commerce oder Mobile Business sind Begriffe, die immer häufiger in den verschiedensten Medien in den unterschiedlichsten Zusammenhängen zu finden sind. Ist Mobile Commerce dabei nur ein Begriff, der viel verspricht, aber letztendlich nur die Milliardeninvestitionen der Telekommunikationsunternehmen rechtfertigen soll? Oder ist das ein neuer „Hype“, der die abstürzenden Kurse der New Econ...

These notes were prepared to explore ideas developed in a panel discussion at Financial Cryptography 2007.

Industrial districts as local networks of small and medium enterprises (SMEs) rooted their competitiveness in a mix of economic relationships and social ties. Recently, network technologies (ICT) have promised gains of efficiency through a reduction in transaction costs and showed new commercial opportunities for small firms. Despite the attention given to transactions managed electronically, a...

We include learning in a standard equilibrium business cycle model with explicit growth. We use the model to study how the economy’s agents could learn in real time about the important trend-changing events of the postwar era in the U.S., such as the productivity slowdown, increased labor force participation by women, and the “new economy” of the 1990s. We find that a large fraction of the obse...

Uber is a popular ride-sharing application that matches people who need a ride (or riders) with drivers who are willing to provide it using their personal vehicles. Despite its growing popularity, there exist few studies that examine large-scale Uber data, or in general the factors affecting user participation in the sharing economy. We address this gap through a study of the Uber market that a...