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Mapping freeze/thaw boundaries with SMMR data
(Elsevier, 1990-08)
Nimbus 7 SMMR data are used to map daily freeze/thaw patterns in the upper Midwest for the fall of 1984. The combination of a low 37 GHz radiobrightness and a negative 10.7, 18 and 37 GHz spectral gradient, [part]Tb/[part]f, ...
Discrete and Continuous Representations of Unobserved Heterogeneity in Choice Modeling
(Kluwer Academic Publishers; Springer Science+Business Media, 1999-08)
We attempt to provide insights into how heterogeneity has been and can be addressed in choice modeling. In doing so, we deal with three topics: Models of heterogeneity, Methods of estimation and Substantive issues. In ...