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	Huff-modellen	Lokalisering-allokeringsmodeller	Strålningsmodellen för rörlighet och migration
Ämnesområde	Rumslig analys	Rumslig analys	Rumslig analys
Familj	Regression model	Process / pipeline	Regression model
Ursprungsår	1964	1963	2012
Upphovsperson	David Huff	Leon Cooper; S. L. Hakimi	Filippo Simini et al.
Typ	Probabilistic spatial interaction model	Spatial facility-location optimization	Parameter-free spatial interaction model
Ursprungskälla	Huff, D. L. (1964). Defining and estimating a trading area. Journal of Marketing, 28(3), 34–38.	Cooper, L. (1963). Location-allocation problems. Operations Research, 11(3), 331–343.	Simini, F., González, M. C., Maritan, A., & Barabási, A.-L. (2012). A universal model for mobility and migration patterns. Nature, 484, 96–100.
Alias	Huff Gravity Model, Probabilistic Retail Gravity Model, Huff Trade Area Model, Huff Çekim Modeli	facility location, p-median problem, maximal covering location problem, yer-tahsis modelleri	Radiation Law of Human Mobility, Parameter-free Mobility Model, Simini Radiation Model, Radyasyon Modeli
Närliggande	3	4	3
Sammanfattning	Proposed by David Huff in 1964, the Huff Model is a probabilistic spatial interaction model that estimates the likelihood that consumers located in a given geographic zone will choose to shop at a particular retail outlet. It extends deterministic gravity models by assigning each consumer zone a probability of patronage across all competing stores, weighting store attractiveness (typically measured by floor area) against the friction of travel time or distance. The model is widely used in retail site selection, trade area delineation, and market share forecasting.	Location-allocation models decide where to place a set of facilities and simultaneously assign demand points to them so as to optimize an objective such as total travel cost, worst-case distance, or population covered. Rooted in the operations-research work of Cooper (1963) and Hakimi (1964) and central to network GIS, they answer questions like where to site warehouses, hospitals, fire stations, or schools to best serve a spatially distributed population.	The Radiation Model, introduced by Simini et al. in 2012, is a parameter-free model for predicting human mobility and migration flows between geographic locations. Drawing an analogy from radiation physics, it predicts trip volumes based solely on population sizes at origin and destination, and the intervening population within the circle connecting them. It has been widely applied to commuting flows, migration, and epidemic spreading.