This paper studies the effects of introducing competition for local passenger railway markets in the German state of Baden-Württemberg. We compare the evolution of the frequency of service on lines that were exposed to competition for the market with lines procured by direct negotiations with...

We define the canonical form of a cost spanning tree problem. The canonical form has the property that reducing the cost of any arc, the minimal cost of connecting agents to the source is also reduced. We argue that the canonical form is a relevant concept in this kind of problems and study a...

This white paper explores a range of potentially attractive partnerships, including those between established US industry members, the entrepreneurial CE (clean energy) community, and the financial industry. These partnerships, include those that can leverage a wide range of entrepreneurial and...