Models *stand in* for the reality they are modeling

"Economists (just like their astronomer forebears) understand that a model stands in for their economic universe to enable them to explore certain properties of that world represented in the model." -- Mary Morgan, The World in the Model, p. 33 (emphasis mine)

The models of physics are no different: they stand in for certain properties of the real world, and allow us to study them in abstract isolation.


  1. I know there are people who do not understand this. Still, this seems so obvious ...

  2. So physics envy is when they want economics to substitue reality.


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