What microeconomic business levers are de facto macroeconomic policy levers as well?
Oil production
Shipping speeds
Electricity production
Internet speeds?
Some ag products I think, like milk?
Maybe steel
Waste management
Real estate isn’t one though. Not concentrated enough 
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Goes back to Adam Smith and importance of infrastructure, right? Markets are abstractions, but they need actually existing entities to implement flows of information, money, and goods.
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