The concept of distance decay, formalized in gravitational models, can be traced back to whose work in the 1850s?

Answer

Carey

The formalization of distance decay in gravitational models dates back to the work of Carey in the 1850s, representing an early, deductive approach to modeling urban growth.

The concept of distance decay, formalized in gravitational models, can be traced back to whose work in the 1850s?
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