Jeffrey Lin, who is an economist at the Federal Reserve Bank of Philadelphia, recently published the following chart:

I found it in this Washington Post article. And it’s packed full of fascinating information.
The chart compares the socioeconomic status in US cities (y-axis) against “distance from city center” (x-axis) in 1880 and then in recent years (1960 to 2010 census data). The orange circles represent the 1880 data and the red and blue lines represent the recent census data.
What this chart and research tells us is that in 1880, rich people overwhelmingly lived in the center of cities. And as you moved further away from the city center, socioeconomic status fell off pretty precipitously. This makes sense given that, at the time, it was hard to get around and travel long distances.
However, in the post-war years, the exact opposite became true. We began driving and wealth decentralized. This should surprise no one.
But what’s interesting is how this appears to be reversing. In 2010 (the red line), there’s a sharp increase in socioeconomic status for people living basically right in the center of cities. And for the 30 - 60 km range, there has been a decrease in socioeconomic status essentially from the 1960s onwards.
The important takeaway here – which is spelled out in the Washington Post article – is that the neighborhoods which appear to be in high demand today are also in very short supply:
“We have 80 years of essentially zero production of neighborhoods with these qualities,” Grant says. “We’ve spent the last 80 years building car-oriented suburbs. Then when the elites decide they want to go back into the city, there’s not enough city to go around.”
This is one reason why supply matters.
This morning I stumbled upon an interesting book by Claudia Kalb called Andy Warhol Was a Hoarder: Inside the Minds of History’s Great Personalities.
I obviously haven’t read it yet, but I like the premise. The book examines 12 famous figures and makes the argument that each of them had some sort of mental health condition that aided them in their success.
Here is an excerpt from a recent Harvard Business Review interview with the author:
“The most common one may be narcissism. Frank Lloyd Wright is a good example. He had classic narcissistic qualities — a sense of grandiosity, superiority, a huge and complete belief in his aesthetic sensibility, and disregard for architecture that did not live up to his standard. Narcissists also have an ability to be charming, and to lure people into their orbit. That’s obviously useful for an entrepreneur. The issue is that while these qualities may make you a good leader, they may not make you a winning boss. Employees often feel that narcissistic bosses are ruthless or lacking in empathy. Also, unlike people with depression or anxiety disorders, narcissists don’t suffer as much personally from their condition — but the way they behave can be much harder on the people around them.”
Related to this topic is an emergent body of research that, more specifically, looks at the relationship between mental illness and entrepreneurship. And according to work done by professor Michael A. Freeman of UC-San Francisco and professor Sheri Johnson of Berkeley, there’s a significant relationship.
Below are two excerpts from a Washington Post article published last year.
“Forty-nine percent of entrepreneurs surveyed reported at least one mental health condition. Nearly a third reported having two or more mental health issues, such as ADHD, bipolar disorder, depression, anxiety or substance use conditions. And half of the entrepreneurs who reported no mental-health conditions identified themselves as coming from families with a history of mental illness.”
Why would these conditions be of any benefit to entrepreneurs?
“For all of its ills, depression also brings empathy and creativity. Martin Luther King Jr. and Mahatma Gandhi attempted suicide as teenagers. Uncommon levels of empathy can allow a businessman to better understand a customer’s need. And a creative mind won’t be satisfied on the corporate ladder, but instead in a fast-moving start-up where he or she can unfurl ideas and dreams.
Individuals with ADHD naturally make decisions faster, are comfortable working independently and are more creative, necessary skills at a start-up. They’re likely to be bored working for someone else.”
From a city building standpoint, all of this is quite relevant. Because for all of the focus on promoting innovation and entrepreneurship, we don’t seem to be talking about healthcare and mental health systems. And there’s clearly an argument to be made that the two are connected.


Earlier this month The Washington Post published an article called, There’s no such thing as a city that has run out of room.
And what it was really about was that when we say there’s no more room (I guess people are saying this), we are really saying that we just don’t want to allow anyone else to become our neighbor. Because the reality is that urban population densities vary widely around the world. So how can you really call a place full?
Jeffrey Lin, who is an economist at the Federal Reserve Bank of Philadelphia, recently published the following chart:

I found it in this Washington Post article. And it’s packed full of fascinating information.
The chart compares the socioeconomic status in US cities (y-axis) against “distance from city center” (x-axis) in 1880 and then in recent years (1960 to 2010 census data). The orange circles represent the 1880 data and the red and blue lines represent the recent census data.
What this chart and research tells us is that in 1880, rich people overwhelmingly lived in the center of cities. And as you moved further away from the city center, socioeconomic status fell off pretty precipitously. This makes sense given that, at the time, it was hard to get around and travel long distances.
However, in the post-war years, the exact opposite became true. We began driving and wealth decentralized. This should surprise no one.
But what’s interesting is how this appears to be reversing. In 2010 (the red line), there’s a sharp increase in socioeconomic status for people living basically right in the center of cities. And for the 30 - 60 km range, there has been a decrease in socioeconomic status essentially from the 1960s onwards.
The important takeaway here – which is spelled out in the Washington Post article – is that the neighborhoods which appear to be in high demand today are also in very short supply:
“We have 80 years of essentially zero production of neighborhoods with these qualities,” Grant says. “We’ve spent the last 80 years building car-oriented suburbs. Then when the elites decide they want to go back into the city, there’s not enough city to go around.”
This is one reason why supply matters.
This morning I stumbled upon an interesting book by Claudia Kalb called Andy Warhol Was a Hoarder: Inside the Minds of History’s Great Personalities.
I obviously haven’t read it yet, but I like the premise. The book examines 12 famous figures and makes the argument that each of them had some sort of mental health condition that aided them in their success.
Here is an excerpt from a recent Harvard Business Review interview with the author:
“The most common one may be narcissism. Frank Lloyd Wright is a good example. He had classic narcissistic qualities — a sense of grandiosity, superiority, a huge and complete belief in his aesthetic sensibility, and disregard for architecture that did not live up to his standard. Narcissists also have an ability to be charming, and to lure people into their orbit. That’s obviously useful for an entrepreneur. The issue is that while these qualities may make you a good leader, they may not make you a winning boss. Employees often feel that narcissistic bosses are ruthless or lacking in empathy. Also, unlike people with depression or anxiety disorders, narcissists don’t suffer as much personally from their condition — but the way they behave can be much harder on the people around them.”
Related to this topic is an emergent body of research that, more specifically, looks at the relationship between mental illness and entrepreneurship. And according to work done by professor Michael A. Freeman of UC-San Francisco and professor Sheri Johnson of Berkeley, there’s a significant relationship.
Below are two excerpts from a Washington Post article published last year.
“Forty-nine percent of entrepreneurs surveyed reported at least one mental health condition. Nearly a third reported having two or more mental health issues, such as ADHD, bipolar disorder, depression, anxiety or substance use conditions. And half of the entrepreneurs who reported no mental-health conditions identified themselves as coming from families with a history of mental illness.”
Why would these conditions be of any benefit to entrepreneurs?
“For all of its ills, depression also brings empathy and creativity. Martin Luther King Jr. and Mahatma Gandhi attempted suicide as teenagers. Uncommon levels of empathy can allow a businessman to better understand a customer’s need. And a creative mind won’t be satisfied on the corporate ladder, but instead in a fast-moving start-up where he or she can unfurl ideas and dreams.
Individuals with ADHD naturally make decisions faster, are comfortable working independently and are more creative, necessary skills at a start-up. They’re likely to be bored working for someone else.”
From a city building standpoint, all of this is quite relevant. Because for all of the focus on promoting innovation and entrepreneurship, we don’t seem to be talking about healthcare and mental health systems. And there’s clearly an argument to be made that the two are connected.


Earlier this month The Washington Post published an article called, There’s no such thing as a city that has run out of room.
And what it was really about was that when we say there’s no more room (I guess people are saying this), we are really saying that we just don’t want to allow anyone else to become our neighbor. Because the reality is that urban population densities vary widely around the world. So how can you really call a place full?
Here are are two scenarios I ran:


It’s important to keep in mind that these numbers are averages for the entire economically contiguous region. So it tells you nothing about the potential spikiness of certain areas. That’s why the population density of New York (which includes portions of New Jersey and Connecticut) probably seems low to you.
Still, it’s fascinating to see how extreme some cities – including some first world cities like Hong Kong – can be. Clearly many cities have a lot of room to become a lot more dense. And I think that would be a good thing.
Here are are two scenarios I ran:


It’s important to keep in mind that these numbers are averages for the entire economically contiguous region. So it tells you nothing about the potential spikiness of certain areas. That’s why the population density of New York (which includes portions of New Jersey and Connecticut) probably seems low to you.
Still, it’s fascinating to see how extreme some cities – including some first world cities like Hong Kong – can be. Clearly many cities have a lot of room to become a lot more dense. And I think that would be a good thing.
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