> Your efficiency would drop considerably if you moved to a 3rd world country and vice versa.
Not necessarily. A barber in Bździszewo Kolonia earning 5 USD per haircut and a barber in New York earning 50 USD per haircut can work exactly as efficiently and do exactly as good a job. The main difference is in how much money their customers have.
Not necessarily. A barber in Bździszewo Kolonia earning 5 USD per haircut and a barber in New York earning 50 USD per haircut can work exactly as efficiently and do exactly as good a job. The main difference is in how much money their customers have.