This recent article by Brookings is a good reminder of the all too important link between land use policies/patterns and GHG emissions. Because electric vehicles are cool and all, but they're still not as efficient as just walking around and/or taking transit.

As has been argued before on this blog, we need to not only electrify our transport network, but we also need to change how we get around. And probably the best way to encourage a modal shift, is to plan and build our cities differently. Something that is simple, but not easy.

It also turns out that people who live in multi-family buildings tend to consume less energy (on a per capita basis) than those in single-family houses. So there are numerous benefits to encouraging denser housing on top of transit and within mixed-used communities.

With all of this in mind, here are some interesting charts from the above Brookings article.

This first one shows new housing permits in the metro areas of Atlanta, Chicago, and Washington DC, according to their urban, suburban, or exurban status. Here, Chicago is an outlier, with the "urban core" (defined as Cook County) now making up about half of all new housing.

If you look at the entire study period, the number is less. The urban core accounted for about one-third of new housing permits in Chicago, and only 15% of permits in Atlanta and DC. But in all cases, housing permits in the urban core have been increasing since the 2008 financial crisis.

But here's the other thing. Looking at these next two charts, there appears to be a clear trendline toward more urban housing typologies. The first of these next two is showing single-family housing permits as a percentage of all new housing. And the second is structure type over time.

Atlanta is still building mostly single-family housing, but less of it. And based on these charts, Chicago has already passed its inflection point. DC is not far off. Every city region is of course going to be different, but it does look like there is some kind of broader housing shift underway.

The last decade has been pretty good for many cities. Recent 2020 Census data tells us that of the 50 largest cities in the US, 46 of them grew their population over the last 10 years. On average, these 50 cities grew by about 8.5%, compared to 5.6% for the decade between 2000-2010.

As you might expect, the fastest growing cities tended to be in the south and the west. The top 3 fastest growing cities over the last decade were Fort Worth (24%), Austin (21.7%), and Seattle (21.1%). The cities with the biggest population declines were Detroit (-10.5%), Baltimore (-5.7%), Milwaukee (-3%).

It's important to keep in mind that city boundaries can skew these numbers depending on how they are drawn. A declining "city" population doesn't necessarily mean that the broader urban area is losing people. Though it does still tell you something about the "city."

Another thing that happened over the last decade is that most of the largest US cities continued to become more diverse. In 2000, white populations were a majority (>50%) in 25 of the 50 largest cities. This dropped to 17 cities in 2010 and then 14 cities last year (2020). Meaning that 36 of the largest cities are now "white minority" cities.

For more data check out this recent article from Brookings.

Last week's general election in the UK was yet another example of the urban-rural divide that we are all seeing emerge around the world. Taking a look at this chart from the Centre for Towns, it's pretty clear that the type of community someone lives in (i.e. how urban), says a lot about the way in which they probably voted. In big cities, the vote share was 49% Labour. And in villages, communities, and small towns, the vote share was about 48-58% Conservative.

But what does this stem from? According to John Burns Murdoch of the Financial Times, the biggest predictor (for constituencies) of a swing vote over to the Conservatives during this last election was the share of the population in a blue collar job. Here is a graph from John's article. Circles with a black outline are constituencies that changed hands last week. Note Great Grimsby, which I wrote about here, in the top right corner.

These facts probably aren't all that surprising to most of you. But it is an important reminder of how concentrated the new economy is becoming in big -- or perhaps I should say, certain -- cities. The Brookings Institution recently referred to this as "a crisis of regional imbalance." Because it's not just a case of urban vs. rural. Brookings found that from 2005 to 2017, more than 90% of innovation sector growth in the US could be traced back to just five metro areas. (You'll be able to guess most of the five. Only one stood out for me.)

This is the world we live in.