Distance and Human Interaction: A Review and Bibliography

able already American Analysis applied areas assumption become Berry caused central place changes chapter computed concept conclusion connection considered correlation costs course Dacey demonstrated Department determined developed diffusion direction discussion distance Distribution earlier economic empirical equation evidence example existing explain exponent fact factors finally findings function further Garrison Geography given gravity models Hägerstrand hand Hence hexagonal ideas important income increase industry influence Institute interaction interesting internal Isard John kinds least linear masses Mathematical means measure mentioned method Michigan migration movements noted observed Olsson opportunities patterns physical population possible potential models PPRSA present probability problems reason recent reference Regional Science relationships Research Review seems shape social Sociological space spatial Statistical Stewart studies suggested Sweden Swedish technique tested theoretical theory tion transformations transport United University Urban usually variables Warntz weights writers