I am skeptical of the author's premise that the top 1% of earners reside in ghettos. He asserts early on that the top approximately 350,000 earners "...overwhelmingly tend to live in segregated neighbourhoods..." and then provides no evidence whatsoever that people in this income range are more likely than others to live in geographically concentrated areas. Do his data, in fact, show this? What about, for example, people of Chinese, South Asian, Italian, or Jewish origin? Are each of these less likely to live in focal concentrations than high earners? This claim runs against my own, admittedly anecdotal, perception that people who earn more than $220,000 per year seem to live all over the place.