See also the article in <I>Cities</I> (2013). Volume 30, pages 59-67.<P> This paper introduces a new measure to approach the accessibility of places in the frame of the digital economy. Information and Communication Technologies (ICTs) and the Internet are not equally spread around places and this...</p></i>

This paper discusses the value that data from mobile phone providers can bring into urban analysis. The novel argument is that the pervasiveness of mobile phone telephony has transformed mobile phones from a communications device to a tool for socio-spatial research. Put simply, mobile phone...

Some 2000 years ago, the average annual distance a person would normally travel, was approximately 500 km. The action radius of most people remained rather stable, but it rose gradually after the industrial revolution to some 1820 km (by car, bus, railway or aircraft) in the year 1960. Then, a...

This paper extends Hotelling's model of price competition with quadratic transportation costs from a line to graphs. I propose an algorithm to calculate firm-level demand for anygiven graph, conditional on prices and firm locations. These graph models of price competitionmay lead to spatial...

We develop a simple test to assess whether horizontal spillover effects from multinational to domestic firms are endogenous to the market structure generated by the entry of the same multinationals. In particular, we analyze the performance of a panel of 10,650 domestic and multinational firms...

This paper examines the relationship between firm births and job creation in Great Britain. We use a new data set for 60 British regions, covering the whole of Great Britain, between 1980 and 1998. The central theme of the paper is that, with the exception of a recent paper by Audretsch and...

This paper explains why consolidation acquisitions occur in waves and it predicts the differing role each firm is likely to play in the consolidation game. We propose that whether a firm assumes the role of rival consolidator, target, or passive observer depends on the position of the firm...

This paper introduces the Werden-Froeb Index (WFI) to assist in evaluating merger-specific efficiencies in horizontal mergers. The index measures the weighted average reduction in marginal costs required to restore pre-merger equilibrium prices and quantities after the (full or partial) merger...

This discussion paper resulted in a publication in <A HREF="http://www.sciencedirect.com/science/article/pii/S019126151300043X">'Transportation Research Part B: Methodological'</A>, 2013, 53, 31-44. We analyse the behaviour of market participants in a multi-modal commuter network where roads are not priced, but public transport has a usage fee, which is set while taking the...</a>

We consider price-fee competition in bilateral oligopolies with perfectly-divisible goods, non-expandable infrastructures, concentrated agents on both sides, and constant marginal costs. We define and characterize stable market outcomes. Buyers exclusively trade with the supplier with whom they...