Greg Ransom writes

2 body astronomy has simple, linear mathematical laws, natural kinds, and physical constants.

Economics doesn’t have anything of the kind.

As Greg’s statement implies and physicist well know – once you move to the three body problem the simplicity collapses.

However, our solar system has at least nine major bodies and millions of lessors ones.

We are lucky that one of those bodies is soooo huge that it swamps all of the others. If were not for that the nature and natures laws would be a shrouded in mystery as the laws governing the behavior of economic agents.

Its worth mentioning that once we reduce the number of economic agents in an experiment – which we can and do perform – our basic “laws” assert themselves quite nicely.

Indeed, when we create frictionless environments like financial markets our ability to use mathematical models to interpret predict and earn profit on what happens goes up substantially.