“…Ewing and Cervero (17) reported typical elasticities with respect to local density, land use mix, and design, of -0.05, -0.05, and -0.03, respectively, versus typical elasticities with respect to regional accessibility of -0.20. However, Stone et al (22), employing an approach similar to that presented herein, estimated elasticities of -0.41 with respect to population density in "urban" tracts, versus -0.19 in "suburban" tracts. The variation in elasticities reported from different empirical studies points to the need for additional work in this field, including the development of improved data inputs, more consistent urban form measures, and improved model specifications (16,18).…”