Comment Re:Roads belong to the rich (Score 2) 111
A metropolitan area of 10 million is not much more productive per capita than 1 million
Of course people want to live in large cities; I for example live in a city of about 200,000 people but would absolutely love to live in New York or Boston or another large city. You are taking your own personal preference and erroneously assuming it applies to everyone else. As for economic productivity per a capita, you are wrong. The difference is large. One standard estimate says that doubling city size results in an increase in productivity of 3 to 8%. See https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fabs%2Fpii%2FS1574008004800063. That means that a city going from 200,000 people to 800,000 has increased in productivity by somewhere between about 7 and 19 percent. But when we compare the 200,000 person city to the 8 million person city, that's around 5 doublings, which means an increase in productivity by around 15 to 40 percent. Now, there are some other estimates with some being lower and others higher. See https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Fwww.journals.uchicago.edu%2Fdoi%2F10.1086%2F675534 and https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fabs%2Fpii%2FS0166046208001269. Complicating factors, there's some evidence that the productivity increase to cities in the US is not as large as it was historically which is likely due to stricter zoning, building codes, and general red tape making efficient use of dense space harder. See e.g. https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Fwww.vox.com%2F2014%2F7%2F15%2F5901041%2Fnimbys-are-costing-the-us-economy-billions.
As for the environment, keep the total population lower and let the rest live a nicer life, not in Megacities.
This is an even worse idea. More people mean more ideas, more new inventions, more economies of scale, and more comparative advantage. We all benefit from a big population.