Quality-adjusted international GDP & industry market-size estimator

@GuthmannR Basically every economic metric is useless when comparing different countries because you can’t factor in the quality of goods and services and those provided by the state. It is possible Americans need to pay a lot of money for private schools, where Japanese are fine with public schools because they have a higher standard. Even if you equate for purchasing power, you need goods like iPhones that are the same in every country and then you have to factor in tariffs or taxes that make it more or less expensive. Then it could also be that the seller just hikes the price for this country for various reason or just because they can.