Math can be brief, you don't need to run experiments and interpret them. Physics can (often) perform the same experiment over and over in different circumstanc

Math can be brief, you don't need to run experiments and interpret them. Physics can (often) perform the same experiment over and over in different circumstances to resolve a question quickly. Economics can perform an experiment once every decade, or even once every half century. For example, what would be the effect of the US government sending cash to every US citizen? We've done that three times, once under Carter, once under Bush, and once under Obama. The data needs to be analyzed thoroughly to see as much as possible the effects of the stimulus, and what was coincidence. You can't produce a "great depression" on demand; you have to wait for the next one to come along. In the mean time, you talk about it.