Download - TRIUMPH OF THE HIGH-AMENITY CITY? - Motu
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Stuart Donovan3 October 2019
TRIUMPH OF THE HIGH-AMENITY CITY?
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Around the world, cities are growing.
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3Source: Lonely Planet (url)
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Source: Wikipedia (url)
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5Source: Science.org (url)
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‹#› Het begint met een idee
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Around the world, cities are growing.
Why?
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‹#› Het begint met een idee
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‹#› Het begint met een idee
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Around the world, cities are growing.
Why? Income growth. And?
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Labour productivity
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‹#› Het begint met een ideeSource: The Buffalo News (url)
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Declining freight costs
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‹#› Het begint met een ideeSource: Mergili.at (url)
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Around the world, cities are growing.
Why? Income growth. And? Industrial change.
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Around the world, cities are growing.
Why? Income growth. And? Industrial change.
What else?
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Urban growth is not ubiquitous
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While ~80% of MSAs in U.S. are growing, 20% are declining.
Mean > Median: The “average city” is growing less than average.
Range: Upper quartile of MSAs growing by more than ~1-2% p.a. while the lower quartile is barely growing at all.
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Idea: Cities reflect an interplay between the benefits of agglomeration and the costs of congestion.
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Agglomeration & Congestion
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Agglomeration economies describe the benefits of proximity.
Congestion costs arise when the utility of consumption declines with use, e.g. roads.
People migrate to cities as long as (private) agglomeration benefits > congestion costs.
Source: Model attributable to Henderson (1974), as discussed in Duranton (2008).
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Agglomeration
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Three main sources:
• Matching, e.g. labour force• Sharing, e.g. infrastructure costs• Learning, e.g. exchange ideas
Agglomeration economies are relatively heterogeneous, varying by sectors and skills.
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Congestion
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Affects many aspects of urban life:
• Transport• Education• Recreation
Congestion is a negative externality; often afflicts publicly-provided goods, where price signals are inefficient or non-existent.
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Idea: Cities arise from an interplay between the opposing forces of agglomeration and congestion.
Implication: Cities that can leverage the benefits of agglomeration while managing the costs of congestion are more likely to prosper.
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Around the world, cities are growing.
Why? Income growth. And? Industrial change.
What else? Agglomeration vis-à-vis congestion.
Is that it?
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Idea: Differences between cities reflect differences in the availability of local amenities.
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What do we mean by local “amenities”?
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• Local amenities are attributes of a location
• Proximity is necessary to enjoy the amenity
• Amenities can be:
• Natural, e.g. climate and physical geography
• Socioeconomic, e.g. infrastructure and institutions
• For households, amenities might include safety, air quality, parks, and schools …
• For firms, amenities might include skilled workforce and international airport …
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How might we estimate the value of amenities?
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The Rosen-Roback model (RRM) is a key model in spatial economics.
• Assumes households and firms choose locations
• Considers interaction between prices (e.g. wages and rents) and “amenities”
• Low prices act as compensation for low levels of amenities, and vice versa
Key point: All households / firms in all locations achieve the same utility / profits.
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Rosen-Roback model: In a “nutshell” (graph)
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For households, high rents indicate high amenities (e.g. resort). High wages, on the other hand, indicate you need to pay people a lot to stay put (e.g. oil rig).
For firms, high rents and high wages indicate the presence of productivity-enhancing amenities that enable firms to spend more yet remain competitive.
Wages
Rents
𝐻𝐻𝐻𝐻𝐻𝐻𝐻𝐻𝐻𝐻𝐻𝐻𝐻𝐻𝐻𝐻𝐻𝐻𝐻
𝐹𝐹𝐹𝐹𝐹𝐹𝐹𝐹𝐻𝐻
e.g. tropical island
e.g. oil rig e.g. city centre
e.g. wasteland
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‹#› Het begint met een ideeSource: Pinterest (url)
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‹#› Het begint met een idee
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Rosen-Roback model: Empirical evidence
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… households … firms
Auckland
Value of local amenities for …
Source: Donovan, S. Space matters: Agglomeration economies and spatial competition in New Zealand, (Unpublished master’s thesis). VU University, Amsterdam, Netherlands, 2011
Marlborough
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‹#› Het begint met een idee
Source: ATEED (url)
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Rosen-Roback model: Empirical evidence
34Source: Preston, K., Mare, D., Grimes, A., & Donovan, S. (2018). Amenities and the attractiveness of New Zealand cities (No. 1124-2019-2357).
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Around the world, cities are growing.
Why? Income growth. And? Industrial change.
What else? Agglomeration vis-à-vis congestion.
Is that it? The role of amenities.
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Idea: Changes in technology and policy are enhancing urban amenity and supporting growth.
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Example #1: Air pollution
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Example #2: Relationships?
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Our research
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• We adapt the Rosen-Roback model to a dynamic setting
• Consider the location choices of households and the production choices of firms
• Incorporate agglomeration economies in production and consumption
• Households to differ by skill level (measured by education)
Estimate model using census data for ~130 cities and towns in New Zealand over ~40-years (8 census waves). Allows us to analyse effects between cities and over time.
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Preliminary findings
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• Amenities matter to households. Like, really matter.
• Climate explains ~25% of the variation in amenities. Top of the South Island has the most valued climate in New Zealand. Of the major cities, Tauranga and Auckland have the best climates.
• Artificially raising rents leads to lower wages. Policies that restrict urban development, e.g. density controls, squeeze workers on two fronts: Higher housing costs and lower wages.
• Housing supply affected by adjustment frictions (“sticky quantities”)
• Urban development has positive regional spillovers
• Strong positive agglomeration economies:
• In production, especially for high-skilled workers
• In consumption, for both high and low skilled
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What does this mean for Auckland?
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What does this mean for Auckland?• The industrial city is dead
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‹#› Het begint met een ideeSource: NFDHS (url)
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‹#› Het begint met een idee
Source: BCC (url)
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What does this mean for Auckland?• The old industrial city is dead• Enable agglomeration; manage congestion
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‹#› Het begint met een idee
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What does this mean for Auckland?
• The old industrial city is dead• Enable agglomeration; manage congestion• Understand what it means to be an “amenable” city
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‹#› Het begint met een idee
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‹#› Het begint met een idee
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‹#› Het begint met een idee
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The Amenable City: Delivers a bundle of amenities that are valued by both households and firms.
Acknowledges the challenges created by imperfect (or non-existent pricing) and variation in preferences.
Accepts “mega-trends”, e.g. technology and climate change, and instead focuses on policies that are dynamically efficient. That is, let’s do better over time.
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Main Themes
• Growing cities. Why?
• Income and Industry
• Agglomeration and Congestion
• Prices and Amenities
• Adjustment Dynamics
• Implications for Auckland
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Acknowledgements
• Funding from “Building Better Homes, Towns and Cities” (url)• My co-authors, Arthur Grimes and Dave Maré from Motu (url) • My employer, Veitch Lister Consulting (url)• Our hosts, Te Pūnaha Matatini (url)
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THANK YOU
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