Are you familiar with the Hygiene Hypothesis? The HH — or, as some of us call it, the “pound of dirt theory” — is grabbing attention again. A minor medical press feeding frenzy followed the publication in the New England Journal of Medicine of a study based on data from Europe. The summary?  read more »

Living on the harsh, wind-swept northern Great Plains, North Dakotans lean towards the practical in economic development. Finding themselves sitting on prodigious pools of oil—estimated by the state's Department of Mineral Resources at least 4.3 billion barrels—they are out drilling like mad. And the state is booming.  read more »

Our virtually instant analysis of 2000 census trends in metropolitan areas has the generated wide interest. The principal purpose is to chronicle the change in metropolitan area population and the extent to which that change occurred in the urban core as opposed to suburban areas.

From a policy perspective, this is especially timely because of the recurring report that suburbanites have been moving to the urban core over the last decade.  read more »

A critical issue from the dreadful earthquake that has severely damaged so much of central Christchurch, taken so many lives, and terrified so many residents of the whole urban area, lies in whether the Central Area should be rebuilt. Some believe it should be abandoned for some other location; others see an opportunity to set new standards in sustainability, urban design, energy efficiency, or whatever ideal urban form takes your fancy.  read more »

In 2010 “House price” ranked third on the list of the top 10 most popular phrases used by Chinese netizens. It came to no one's surprise. In most Chinese cities housing prices have increased significantly over the past decade, with an especially sharp rise over the past three years.  read more »

The newly released Census reports reveal that California faces a profound gap between the cities where people are moving to and the cities that hold all the political power. It is a tale that divides the state between its coastal metropolitan regions that dominate the state’s politics — particularly the San Francisco Bay Area, but also Los Angeles — and its still-growing, largely powerless interior regions.  read more »

The state of New Jersey virtually defines suburbanization in the United States.  New Jersey is not home to the core of any major metropolitan area but, major portions of the nation's largest metropolitan area (New York) and the fifth largest metropolitan area (Philadelphia) are in the state (See map). These two metropolitan areas comprise 17 of the state's 21 counties. Another county (Warren) is in the Allentown, Pennsylvania metropolitan area, while Atlantic (Atlantic City), Cumberland and Cape May are single-county metropolitan areas.  read more »

The ongoing Census reveals the continuing evolution of America’s cities from small urban cores to dispersed, multi-polar regions that includes the city’s surrounding areas and suburbs. This is not exactly what most urban pundits, and journalists covering cities, would like to see, but the reality is there for anyone who reads the numbers.  read more »

Yoga. Mantras. Bollywood. Henna tattoos. Once unique to India, each of these has now become commonplace in households across the globe. As a first generation East Indian American, I've had an opportunity to contrast the world my parents experienced with the one I inhabit. When my parents first settled here in the 1980s Indian cultural influences were not this prominent, but the increases in America and around the globe have been dramatic.  read more »

Ever since Jay Gould, Leland Stanford, and Cornelius Vanderbilt acquired their first legislatures, railroads have been best understood as political networks, rather than as transportation lines. The Obama administration is hyping high-speed rail (HSR) with a $53 billion proposal not because the president is a trainspotter or because he collects back copies of the Official Guide of the Railways (like I do).  read more »