The supramolecular structure, formed by a PEO-PPO-PEO copolymer, PEO13PEO30-PEO13 or Pluronic L64, in mixtures of xylene/water, was investigated by small-angle X-ray scattering over a temperature range of 25–60°C and by small-angle neutron scattering over a temperature range of 13–29°C....

Most highways in urban China are tolled to finance their construction. During the eight-day National Day holiday in 2012, highway tolls are waived nationwide for passenger vehicles. We use this to test highway tolls’ effect on air pollution. Using daily pollution and weather data for 98...

This paper uses a popular web mapping and transportation service to generate information for more than 22 million counterfactual trip instances in 154 large Indian cities. It then develops a methodology to estimate robust indices of mobility for these cities. The estimation allows for an exact...

This paper proposes a micro-foundation for knowledge spillovers. I model a city in which free knowledge transfers are bids by experts to entrepreneurs who auction jobs. These knowledge bids resemble a consultant's pitch to a potential client. Two fundamental properties of knowledge underlie the...

Large-scale transport infrastructure investments connect both large metropolitan centres of production as well as small peripheral regions. Are the resulting trade cost reductions a force for the diffusion of industrial and total economic activity to peripheral regions, or do they reinforce the...

Large scale transport infrastructure investments connect both large metropolitan centers of production as well as small peripheral regions. Are the resulting trade cost reductions a force for the diffusion of industrial and total economic activity to peripheral regions, or do they reinforce the...

A recent string of "new economic geography" (NEG) models has set focus on the impacts of trade liberalisation on the intra-national distribution of economic activity. What the existing contributions have in common is a basic two-sector assumption (agriculture/manufacturing) and a resulting focus...