Effects of differential mobility on biased diffusion of two species

Using simulations and a simple mean-field theory, we investigate jamming transitions in a two-species lattice gas under non-equilibrium steady-state conditions. The two types of particles diffuse with different mobilities on a square lattice, subject to an excluded volume constraint and biased in opposite directions. Varying filling fraction, differential mobility, and drive, we map out the phase diagram, identifying first order and continuous transitions between a free-flowing disordered and a spatially inhomogeneous jammed phase. Ordered structures are observed to drift, with a characteristic velocity, in the direction of the more mobile species.Comment: 15 pages, 4 figure

Land use Controls: The Case of Zoning in the Vancouver Area

This paper explores the relationship between rezoning and changes in observed property values and the ability of zoning to mitigate externalities. Three separate methodologies are used in three locations in metropolitan Vancouver to examine these issues. Our results imply that rezoning does not necessarily lead to changes in land use and value. Further, no evidence was found to support the assertion that there are significant negative externalities due to incompatible land uses in residential property markets. Based on these results, we feel it is reasonable to question the continued use of zoning in developed areas of urban regions. Copyright American Real Estate and Urban Economics Association.