New Geography

Tag: urbanization

  • Beijing Gigacity to Cover Area of Cambodia or Oklahoma

    Today, there are about 30 megacities in the world, where more than 10 million residents live. The largest is Tokyo, at about 38 million. Recent announcements by the government of China could lead to the worlds’ first gigacity (for want of a better term, used here to denote a city of more than 100,000,000 population, see note). According to the Nanfang Insider, the economic integration of megacity Beijing, megacity Tianjin and eight cities (prefectures) in the province of Hebei would result in a city of 130 million. China Daily is a bit more circumspect, indicating that the Beijing supercity would have only 85 million.

    The giga/super city would be tied together by new rapid transit lines and highways and surrounded by the 7th Ring Road, adding to the six that have already been built. The 7th Ring Road would consist of two roads, circling most of the area, and extending to a combined 850 miles (2,200 kilometers). By comparison, London’s M-25 is 117 miles long (188 kilometers), the Moscow MKAD 68 miles long (109 kilometers) and the Washington beltway is 64 miles long (103 kilometers)

    The giga or super city is not likely to really be a city, because it would be much larger than a labor market (this is why the near continuous urbanization from Boston to Washington or Tokyo to Osaka-Kobe-Kyoto is not a city). The estimated land area is 67,000 square miles (175,000 square kilometers). This is nearly as large as Cambodia or the state of Oklahoma. Providing the point to point daily commuting in such a large area is well beyond the capability of any affordable transportation system. Star Trek like teleportation could do the trick. Meanwhile, however, there is plenty to be gained from the economic integration of this large area.

    Graphic of the new 7th ring road from nanfang.com:


    Note: Technically, a gigacity would need 1 billion people (10 to the 9th power). However, megacities, with their 10 million minimum are also wrongly named. A city with a mega city would have 1,000,000 people (10 to the 6th power). Artistic license justifies the gigacity term under the circumstances. Besides, with the slowing growth of world population, it seems unlikely than any city will achieve a population of 1 trillion.

  • Development Plans for Old Hong Kong Airport Announced

    The government of the Hong Kong Special Administrative Region has outlined plans to create a "second central business district" at Kai Tak in eastern Kowloon, site of the now former international airport. Kai Tak airport was abandoned in 1998 when the new Hong Kong International Airport at Chep Lap Tok opened.

    Kai Tak is in the middle of the most dense urban development in the high income world. The government intends that the development will have 43 million square feet of office space (4 million square meters) and will cost HK$100 Billion (approximately $13 billion).

    The development would be served by a monorail, which would connect with MTR (metro) lines at Kwun Tong and to a proposed central link MTR line to the new town of Sha Tin.

    Photo: Kai Tak Airport and East Kowloon (by author)

  • Suburban “End-Times” Reality Check

    The Atlantic’s Alex Madrigal announces "The Beginning of the End for Suburban America," a wish and hope long dressed-up as reality by a well-placed few who believe that the "be – all and end – all" is living anywhere but the suburbs. This is not to suggest that there is anything wrong with living in the core urban core if that is what one wants to do. I certainly have enjoyed living part-time in the inner core of the ville de Paris for some years. At the same time, however, the behavior of people has revealed an overwhelming preference for more space. From New York to Paris and Tokyo, some people choose to live in dense urban cores and a lot more choose to live in suburbs (and exurbs).

    What data does Madrigal cite to show "the beginning of the end for suburban America"? Driving is down from a peak in 2007, also the year that employment peaked. These are not disconnected events. With the total unemployed now about equal to the number of employed workers in the New York and Chicago metropolitan areas, work trips that are not made nearly equal the decline in driving. The higher gas prices appear to have induced people (in the suburbs and in the dense cores) to make modest reductions in discretionary trips or to more efficiently organize their shopping trips.

    Madrigal also points out that in 2010 new houses were smaller than their peak (also 2007). The median house size was still larger than any year before 2005 and 100 square feet larger than 2000. Madrigal cites declining rates of demand increase for electricity.
    The connection between these trends and the suburbs is unclear. Madrigal does not separate the trends by residential geography, the more dense cores of metropolitan areas, the suburbs and exurbs of metropolitan areas and the balance of the nation. Granted, the data is not immediately available for such analysis.

    Fortunately, there is more precise data that differentiates between dense core and suburban trends. It is the United States Census, conducted every 10 years and most recently in 2010. Between 2000 and 2010, the core municipalities of the 51 metropolitan areas with more than 1 million population captured 9% of the population growth, while the suburbs and exurbs captured 91%. The suburbs actually did better in the 2000s than in the 1990s, when they accounted for only 85 percent of the growth.

    True, the relative decline of the denser cores did not resemble the disastrous decade of the 1970s. Further, the gains made by very small areas of the core over the past 10 years have been an important advance. But to suggest that the 2000s represent "the beginning of the end for suburban America" is profoundly at odds with reality.

    So, the decade of the 2000s was another false start for the heralds of the suburban "end-times." The wishing and hoping has to be delayed yet again.

  • Urban Densities Exclude Rural Areas: Avent Postscript

    We recently noted that Ryan Avent was one third right in his recent Sunday New York Times article on urban density. Avent has posted a response suggesting that it is inappropriate to use average urban densities in urban productivity analyses, as we had done, but that "weighted average densities" should be used instead. Weighted average density was not mentioned in his New York Times article.

    In the interim, we were able to find the studies on urban density and productivity that seem to match those Avent refers to in his New York Times article. There are two studies concluding that doubling employment (not population) density increases productivity by six percent (Ciccone & Hall, 1996 and Harris & Ioannides, 2000), as Avent noted.  Another study (Davis, Fisher & Whited, 2007) indicates that doubling employment densities could increase productivity by as much as 28 percent, also as Avent noted.

    Urban and Rural Density Combined Are Not Urban Density: In contrast to Avent’s preference for weighted average density, each of the studies uses average density, like with our analysis. More importantly the econometric formulas in the studies do not include an urban density variable. The density variables in all three studies include rural areas.

    The studies use county, metropolitan area and sub-metropolitan area densities, each of which contain far more rural land than urban land. By definition, urban areas exclude rural areas and, as a result, the moment rural areas become a part of the calculation, the result cannot be urban densities. In 2000, Census Bureau data showed counties (county equivalent level jurisdictions), which comprise the entire nation, to be less than three percent urban and more than 97 percent rural (Figure 1). Metropolitan areas also have a similar predominance of rural land (Figure 1). Among major metropolitan areas (those with more than 1,000,000 population) in 2000, approximately 85 percent of the land was rural and 15 percent of the land was urban (Figure 2).

    Ciccone & Hall use employment density at the county level and thus mix urban and rural densities. Harris & Ioannides use employment densities at the metropolitan statistical area or the primary metropolitan statistical area level (a sub-metropolitan designation since replaced by the more appropriately titled "metropolitan division"). Davis, Fisher & Whited use employment densities at the metropolitan statistical area level. The two studies using metropolitan areas or parts of metropolitan areas also mix urban and rural densities.

    Urban Area Densities: Urban density is calculated at the urban area level, which is the area of continuous urban development. This is also called the urban footprint, which is generally indicated by the lights of the city one would see from an airplane on a clear night. Urban areas are delineated using the smallest census geographical units ("census blocks," which are smaller than census tracts) each ten years. The 2010 data will be released next year. Among urban areas, the highest density core urban area in a major metropolitan area (Los Angeles) is approximately four times the lowest (Birmingham).

    Nonsensical Metropolitan Area Densities: Theoretically, metropolitan areas are labor market areas, which include a core urban area (and sometimes more than one urban area) and nearby rural areas from which people commute to work in the urban area (can be called the "commuter shed"). However, in the United States, metropolitan areas are too coarsely defined for density comparisons with one another. US metropolitan areas are composed of complete counties or, in the six New England states, complete towns. This jurisdictionally based criteria can produce metropolitan areas that are much larger than genuine labor markets in a number of cases and some that are smaller. American metropolitan areas are not spatially consistent by any functional labor market definition. Metropolitan densities are thus nonsensical, no matter what density is being measured (such as population or employment density). Among major metropolitan areas, the highest density metropolitan area (New York) is 24 times that of the lowest density (Salt Lake City), six times the maximum difference in urban area density.

    Metropolitan Ireland and Happenstance: In the similarly sized San Francisco (as used by Davis, Fisher and Whited) and Riverside-San Bernardino metropolitan areas, San Francisco has 1,700 square miles of rural land, while Riverside-San Bernardino has 26,000, approximately 15 times as much. At more than 27,000 square miles, Riverside-San Bernardino covers more land area than the Republic of Ireland. The difference in population densities between metropolitan areas is determined in considerable measure by the size (land area) of the included counties, not by the number of people in cities.

    If the state of California were to carve out a new county composed of western Riverside and San Bernardino counties (as Colorado created Bloomfield County in the early 2000s), the land area of the metropolitan area could be reduced 95 percent, because the remainder would not meet the criteria for inclusion in Riverside-San Bernardino. The importance of the density variable for Riverside-San Bernardino in econometric formulas would be increased many times. With only 3,100 county level jurisdictions of varying sizes, this kind of incomparability cannot help but occur. The boundaries of metropolitan areas are defined by political happenstance.

    On the other hand, the nation’s urban areas are built up from 7,000,000 census blocks. This permits a fine grained definition that makes urban areas appropriate for density comparisons. The definition of urban areas is beyond political fiat.

    Metropolitan areas in the United States could be readily defined at the census block level, just like urban areas. Regrettably, the Office of Management and Budget missed another opportunity in the 2010 census to make the necessary criteria change. U.S. metropolitan area data is of great value for most analysis, but misleading for spatial or density analysis.

    Low-Density Productivity: Subregionalizing the density and productivity analysis would pose problems. Avent uses household incomes as his standard (and we agree that cost of living differentials are important). The San Jose metropolitan area has the highest household incomes of any major metropolitan area and would therefore be among the most productive. Yet, San Jose’s automobile-oriented Silicon Valley, to which much of the productivity is attributable, has a far lower employment density than the transit and pedestrian oriented cores of Manhattan and San Francisco (and yes, even not-so-transit oriented downtown Phoenix). In low-density Seattle, Microsoft’s automobile oriented Redmond campus probably ranks among the most productive real estate in the country, yet its employment density (like that of Silicon Valley) pales by comparison to the higher density cores of Seattle, Phoenix, Nashville, Oklahoma City and virtually every other downtown core of a major metropolitan area.

    At the End, Agreement: Avent concludes, "I just want to make sure we stop costing ourselves easy opportunities for growth." I could not agree more. It is time to abandon regulations that artificially raise housing prices, deprive households of a better standard of living, and drive them to places they would rather not live. For centuries, people have flocked to urban areas for better economic opportunities. Urban areas should be places where people can realize their aspirations, not places that repel them because it doesn’t suit the interests of those already there.

  • More Hyperbole on Ghost Cities in China

    The so-called Chinese "Ghost Cities" have been the subject of a number of articles in recent months. There appears to be some truth in the reports, such as in the building of a near empty new city in Inner Mongolia (Ordos). There is also a good deal of hyperbole.

    A recent article ran in the Business Insider, entitled "New Satellite Pictures of China’s Ghost Cities," which relied principally on satellite images, some quite old. Somewhat more proximate (as on-the-ground")  pictures are provided and linked in this article. They show that at least two of the Ghosts have risen from the dead (or they may never have been dead at all).

    Changsha, Hunan: Changsha is the rapidly growing capital of Hunan province, adding nearly 50 percent to its urban districts between 2000 and 2010 (even greater growth than in the US growth leaders, Las Vegas and Raleigh). The Business Insider article displays a satellite image showing huge areas of construction both to the northeast and to the west of the urban area.

    When planning a 2009 trip to China, I chose to visit Changsha because of the extensive construction shown in this very same satellite image. In my continuing satellite image research on urban areas, especially relating to  Demographia World Urban Areas, I noted that this appeared to be the most extensive construction in the nation. A number of photographs are included inour Changsha Rental Car Tour,  which were taken in September 2009.

    On a rainy and quiet Sunday afternoon I took a tour of the northeast construction area and found that much of the construction had been finished. Moreover it was obvious from both the traffic and the open shopping centers and shops that this was anything but a "ghost city" (see photograph, above).

    The next day I took a similar trip to the western construction area. As in the northeast, much of the construction was complete and the communities were alive.

    Zhengzhou, Henan: Zhengzhou is also rapidly growing even faster than Changsha (over 60 percent in 10 years) and is the capital of Henan province. The article displays multiple satellite images of the Zhengzhou New Area. Because of a previous article in the Daily Mail, I took the opportunity on a recent trip to visit the Zhengzhou New Area and file a report. The Zhengzhou New Area is alive.

    The Business Insider also indicates an unfamiliarity with Chinese geography.

    Outside Jiangsu? A couple of the photographs referred to empty developments as being "outside Jiangsu," as a Westerner might describe a development as being outside Phoenix or Omaha. However Jiangsu is not an urban area or city, it is a province. Thus, to refer to a development as being outside Jiangsu is akin to referring to a development as being outside Arizona or Nebraska.

    Changsha Already Twice as Large as Los Angeles? The Business Insider also advises us that Changsha is already twice as big as Los Angeles. In fact, there are no comparable geographies between Los Angeles and Changsha that could make such a statement even close to accurate. Regrettably, many writers and much of the press make comparisons between China and other nations without the remotest idea of the meaning of the geographical terms they are using. Here are a couple of ways that Los Angeles and Changsha can be compared.

    1. Central municipality: The central municipality or core city of the Los Angeles area is the city of Los Angeles. It has a population of approximately 3.8 million people, but accounts for less than one third of the population of either the metropolitan area (functional area or labor market area) or the urban area (physical area or area of continuous development). Strictly speaking, there are no central municipalities in China, because the regions or prefectures are themselves municipalities. It is as if the city of Los Angeles comprised both Los Angeles and Orange counties. Chinese municipalities are divided into districts and if a comparison were to be made at the central municipality level, Changsha’s central district would have to be used. This would be the district (qu) of Furong, which has a population of 500,000 people, about 1/8 that of the city of Los Angeles.

    Core city comparisons are fraught with difficulties. This is illustrated by Melbourne, which had little more than 70,000 people in the last Australian census, approximately two percent of the metropolitan population. The 2010 US Census showed Melbourne, Florida to be larger.

    2. Urban Area: The one level at which they valid comparison could be made is the urban area, or the area of continuous urban development. The latest data for Los Angeles (2000) indicates an urban area population of 11.7 million people. The 2010 US Census counts for the Los Angeles area suggest that the urban area total, once released will be little higher than the 2000 figure.

    Based upon the 2010 census data, the next edition of Demographia World Urban Areas will estimate the Changsha urban area at approximately 3,000,000 people. Thus, by the urban area metric, Changsha has a population approximately one-quarter that of Los Angeles.

    It is possible that Business Insider like others, compared the population of the central city of Los Angeles (3.8 million), which is only part of the urban area to that of the Changsha municipality (7 million), which has more than double the population of the Changsha urban area and covers at least 25 times as much land area (virtually all it rural). They are not the same thing.

    —–

    Photograph: In the northwestern Changsha "ghost city:" September 2009 (by author)

  • A Bump in the Road to Chinese Urbanization?

    China has been urbanizing at a break-neck pace. Between 1980 and 2010, nearly China’s urban areas have added 450 million people, nearly 1.5 times the population of the United States. Nearly one-half (47%) of the nation’s population now lives in urban areas and the figure is expected to exceed 60% by 2030, according to United Nations data.

    According to The Asia Times, 230 million of these new residents are temporary migrants. They are people who have migrated from rural areas to take jobs in factories or other generally lower paid occupations. Under the nearly 60-year old Chinese residency permit system (“hukou”) citizens have either rural or urban residency rights. A principal purpose of this system was to limit the flow of rural residents to the urban areas.

    As Deng Xiaoping’s reforms took effect in the early 1980s, industrial production and exports skyrocketed and this required rural labor to migrate to the urban areas. Migrants were granted temporary status, but not permanent. It is possible, but difficult to transfer one’s hukou from rural to urban. Yet the demand for such transfers has been overwhelming.

    Yet, an article in the national newspaper, China Daily could mean a slowdown in the trend. The issue is the cost of living. Reporter Wang Yan notes that, for the first time, there is now a growing demand for transferring hukou residential status from urban to rural. There are currently no routine national procedures for such transfers.

    A survey of 120,000 temporary migrant workers in urban areas working by the Chinese Academy of Social Sciences research center found that only 25 percent would be interested in trading their rural residency permits for urban residency permits. The survey covered working age adults in 106 prefectures with large urban areas.

    The driving factor is economic. As in the United States, where differences in housing affordability are strongly associated with domestic migration trends, costly urban housing in China could be fueling a new attraction for rural areas. The cost of housing has risen substantially in China’s urban areas. At the same time, the cost of housing is near-zero in the rural areas. Further, residents of rural areas within prefectures with large urban areas have the hope of selling their land for urban development in the longer run and making a substantial profit. However, this new-found affection for the countryside is likely to be limited to areas relatively close to urban centers, to which rural residents can commute for better paying jobs.

    The government has announced plans to reform the hukou residency permit system. According to Zhang Yi, director of the Chinese Academy of Social Sciences research center is a system that “ensures freedom of migration.”

    The United Nations projections may be right. The stated preferences identified in the Chinese Academy of Social Sciences survey may not ultimately reveal themselves in actual behavior. But predictions are no more than predictions.

    Picture: Shenzhen: Luxury Housing (foreground) and Migrant Housing (background)