TRIUMPH OF THE CITY - Centro Rossi Doria · Hungary Venezuela, RB Korea, Rep. Portugal Greece Spain...
Transcript of TRIUMPH OF THE CITY - Centro Rossi Doria · Hungary Venezuela, RB Korea, Rep. Portugal Greece Spain...
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TRIUMPH OF THE CITYHow Our Greatest Invention Makes Us
Richer, Smarter, Greener, Healthier and Happier.
Edward Glaeser(Harvard University)
Institutional Greetings
Mario Panizza (Rector, Roma Tre University)
Silvia Terzi (Director, Department of Economics)
Introduction and Chair
Riccardo Crescenzi (London School of Economics and Rossi-Doria Centre)
Wednesday 25 March 2015, h. 15:00
Scuola di Economia e Studi Aziendali - Roma Tre University
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0 2 4 6 8 10Population Density
Per Capita Income, 2000
Population Change, 2000-2010
Source: U.S. Census
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Detroit
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Change in Housing Prices, 2001-2006 vs. 2006-2011
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Log density, 1990
Change in Housing Prices 96-12 .
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“I regard the growth of cities as an evil thing, unfortunate for mankind and the world. ”
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are
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$0-1000 $1000-2000 $2000-3000 $3000-4000 $4000-5000
Source: World Bank
Share of Countries over 1/3 Urbanized, by GDP per Capita (2012 $)1960 and 2010
1960 2010
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67
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0 .2 .4 .6 .8 1% Urbanization, 2010
Log of P.C. GDP 2010 PPP Fitted values
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Quintile of Population Density
Index of Earnings for Urban Areas
US India China
USA data is from the 2005 ACS. China data is from the 2005 Census. India data is from the 2005 IHDS (India Human Development Survey)
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Per Capita GDP Growth 1960-2010(Poor Countries<$5000 PC GDP)
Congo, Dem. Rep.
Burundi
Liberia
Niger
Malawi
Sierra Leone
Central African Republic
AfghanistanUganda
Rwanda
Togo
Nepal
Zimbabwe
BangladeshBeninKenyaCambodia
Pakistan
Senegal
Cameroon
Cote d'Ivoire
Zambia
Ghana
Papua New Guinea
India
Nicaragua
Sudan
BoliviaHonduras
Philippines
Sri Lanka
Iraq
Egypt, Arab Rep.Morocco
Guatemala
Syrian Arab Republic
Congo, Rep.
El SalvadorEcuador
China
Algeria
Thailand
Jamaica
Dominican RepublicPeru
Colombia
South AfricaPanamaCosta Rica
Malaysia Mexico
Turkey
Brazil
UruguayChile
Korea, Rep.
PortugalGreece
Spain Hong Kong SAR, China
SingaporeJapan
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01
23
GD
P G
row
th 1
96
0-2
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0 .2 .4 .6 .8 1Urbanization in 1960
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02
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Life
Sa
tisfa
ction
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1 2 3 4 5
Life Satisfaction by Percent Urbanization(Quintiles)
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Rwanda
MaliGhana
India
Moldova
Iraq
Egypt, Arab Rep.
Morocco
Guatemala
Indonesia
Ukraine
Thailand
Bulgaria
South Africa
RomaniaMalaysia
Argentina
Mexico
Russian FederationBrazil
Uruguay
Poland
Slovenia
CyprusSpain
New ZealandItaly
United Kingdom
France
Germany
Japan
Finland
CanadaUnited StatesNetherlands
Sweden
AustraliaNorway
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ap
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4 6 8 10 12Log of Per Capita GDP
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Photo by PostdilAlfred Peet
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Ford’s Big Idea (River Rouge)
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The Decline of the Costs of Moving Goods
Dol
lars
per
Ton
Mile
(R
eal)
Railroad Revenue per Ton Mileyear
1890 2000
.02323
.185063
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Average Population Growth by Average January Temperature(Quintiles)
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City 1950 Pop. 2010 Pop. Change
New York 7,891,957 8,175,133 +4 %
Chicago 3,620,962 2,695,598 -26%
Philadelphia 2,071,605 1,526,006 -26%
Los Angeles 1,970,358 3,792,621 +92%
Detroit 1,849,568 713,777 -61%
Baltimore 949,708 620,961 -34%
Cleveland 914,808 396,815 -56%
St. Louis 856,796 319,294 -63%
Washington 802,178 601,723 -25%
Boston 801,444 617,594 -23%
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Subjective Well-Being Across Space
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Subjective Well-Being and Population Growth
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Will the last person to leave Seattle please turn out the lights?
Photo by PostdilAlfred Peet
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Average Population Growth by Share with BA in 2000(Quintiles)
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Share of Adults with B.A.s 2000
Per Capita GDP 2010 .
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NOTE: Using data from the Indian Human Development Survey (2005) and the General Census (2001)
District-level observations for India
Wage residuals and Population with BA degree
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Share w/BAs 1940
Change in Share w/BAs 1940-2000 .
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Photo by Mario Roberto Duran Ortiz
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Chinitz: Contrasts in Agglomeration: New York and Pittsburgh
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0.5
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1 2 3 4 5Smallest firms are in Quintile 1
MSA Employment Growth (1977-2010)by Average Firm Size (1977) Quintiles
Economic Growth and Firm Size
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The Strength of Favelas
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Country Largest City(Population)
Percent Urbanized
Percent in Million+ Agglomeration>
GDP P.C. 2010$(PPP Adjusted)
Congo(Dem. Rep)
Kinshasa(9 Million) .34 .17
210(330)
ZimbabweHarare(1.6-2.8 Million) .38 .12
625(missing)
MaliBamako(1.8 million) .34 .13
650(1100)
HaitiPort-au-Prince(1 – 2.4 Million) .52 .21
700(1000)
PakistanKarachi(23.5 Million) .36 .19
1100(2400)
SenegalDakar(1-2.5 Million) .42 .24
1100(1700)
Poor (under $1200 p.c.), Populous Countries that are one-third urban,
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World’s Largest Cities through history (Chandler et alia)
Year reached one million (world maximum until 1800)
Approximate per capita income $2012 (generally Maddison)
ExtenuatingCircumstances
Rome 1 $1400– Italy$1000– Empire
Strength abroad –weakness at home and political change
Chang’anKaifengHangzhou
800 10001200
$820Political centers of a vast empire– figures highly debatable
Baghdad 900 $1144Highly centralized Abbasid Caliphate
Beijing 1800 $1050Small share of overall country
Edo/Tokyo 1725 $1000 Metro Region
London 1810 $3000Just predates mass industrialization
New York 1875 $4750First non-political mega-city
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Government Effectiveness and Urbanization
Congo, Dem. Rep.
Burundi
Liberia
Niger
Malawi Mozambique
Sierra Leone
Central African RepublicAfghanistan
UgandaTanzania
Rwanda
Togo
Nepal
Gambia, The
Zimbabwe
Mali
Haiti
Bangladesh
BeninKenya
Cambodia
TajikistanKyrgyz Republic
Lesotho
Pakistan
Senegal
MauritaniaCameroon
Lao PDRCote d'Ivoire
Vietnam
Zambia
Yemen, Rep.
Ghana
Papua New Guinea
India
Nicaragua
Sudan
Moldova BoliviaHonduras
Philippines
Mongolia
Sri Lanka
Iraq
Egypt, Arab Rep.Morocco
Paraguay
GuatemalaSyrian Arab Republic
Indonesia
Congo, Rep.
Ukraine
GuyanaArmeniaEl Salvador
Tonga
SwazilandFiji
Albania
Ecuador
Belize
TunisiaJordan
China
Algeria
ThailandNamibiaJamaica
Dominican Republic
Serbia
Peru
ColombiaBulgaria
Maldives
South AfricaBotswana
Mauritius
Panama
Romania
Costa Rica
Malaysia
Gabon
KazakhstanArgentina
MexicoTurkey
Russian Federation
Latvia
Brazil
Lithuania UruguayPoland
Chile
HungaryCroatia
Venezuela, RB
Estonia
Barbados
Trinidad and Tobago
Slovak Republic
Saudi Arabia
Bahrain
Czech RepublicMaltaKorea, Rep.
PortugalSlovenia
Greece
Israel
Cyprus
SpainBrunei Darussalam
Hong Kong SAR, ChinaNew Zealand
Italy
United KingdomFranceIceland
United Arab Emirates
Germany
Singapore
Belgium
Japan
Finland
Austria
Kuwait
Ireland
Canada
United States
Netherlands
Sweden
Australia
Macao SAR, China
Denmark
Switzerland
Qatar
NorwayLuxembourg
Libya
Iran, Islamic Rep.
Cuba
Myanmar
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Go
vern
men
t E
ffectiven
ess
0 .2 .4 .6 .8 1Urbanization Share
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Three Questions
• Why are very poor countries urbanizing so rapidly, when the west didn’t urbanize until they were much richer?
• Is this urbanization at such low income levels good or bad?
• How can economics help understand and hopefully mitigate the problems that accompany poor world mega cities?– A microeconomic and institutional approach
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Understanding the Urbanization
• A model with tools that borrow from Krugman(1991) and an insight from Matsuyama (1992).
• The key idea is that global trade mitigates the need to develop agricultural productivity and national transportation infrastructure. – Food is substantially cheaper than it was (US wheat
dropped 75 percent in real costs 1920-2006)in 1920.
• The model also helps to explain the different pattern of European cities (with far fewer mega-cities).
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Simulation # 1: Open Economy, Highly Productive Manufacturing
Urbanization Rate
Rural Welfare Urban Welfare
0 .5 1
0
5
10
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Simulation # 2: Open Economy, Less Productive Manufacturing
Urbanization Rate
Rural Welfare Urban Welfare
0 .5 1
0
5
10
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Simulation # 3: Open Economy, More Productive Agriculture
Urbanization Rate
Rural Welfare Urban Welfare
0 .5 1
0
10
20
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Government Ineffectiveness and Urbanization
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Simulation #4: Closed Economy, More Productive Agriculture
Urbanization Rate
Rural Welfare Urban Welfare
0 .5 1
0
20
40
60
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Simulation # 5: Closed Economy, Less Productive Agriculture
Urbanization Rate
Rural Welfare Urban Welfare
0 .5 1
-1
0
1
2
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Core Results
• In an closed economy, there will exist a unique equilibrium that is independent of urban productivity, but urbanization will be rising with rural productivity, and falling with transport costs, and overall population.
• In an open economy, there will typically exist multiple equilibria or only all agriculture and the middle one is not stable.
• In the stable equilibrium, urbanization rises with urban productivity, the manufactured good price and amenities and declining with rural productivity and rural transportation.
• In the past, agricultural development needed to precede urbanization, but that is no longer true in an open world.
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Congo, Dem. Rep.
Mozambique
AfghanistanUgandaTanzania
Nepal
Mali
BangladeshKenya
Cambodia
Pakistan
Cameroon Vietnam
Yemen, Rep.
Ghana
India
Sudan
Philippines
Sri Lanka
Iraq
Egypt, Arab Rep.
Morocco
IndonesiaChina
Algeria
Thailand
PeruColombia
Bulgaria
South Africa
Romania
Malaysia
Argentina
Mexico
Turkey
BrazilPoland
Chile
Hungary
Venezuela, RB
Korea, Rep.
Portugal
Greece
SpainItaly
United Kingdom
France
Germany
Belgium
JapanAustria
Canada United States
Netherlands
Sweden
Australia
Switzerland
Iran, Islamic Rep.
Cuba
Myanmar
0.2
.4.6
.81
Urb
an
iza
tion
196
0
0 1000 2000 3000 4000Cereal Yield per Hectare 1961
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Welfare Analysis
• In the open economy, the social benefits of adding more urban population depend on – (1) urban-rural welfare (should be zero),
– (2) urban agglomeration economies,
– (3) congestion in rural sector,
– (4) urban amenity diseconomies
• In a closed economy, you add on a price effect because even though prices are transfers the marginal utility of consumption is not necessarily equal (Stone-Geary).
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The Search for Optimal City Size
• It is awfully hard to say anything sensible about these combined terms.
• Agglomeration economies mean market failures but that’s not enough to justify government action.
• I often think that the macro-approach to regional development/optimal city size is doomed. – As opposed to focusing on particular urban problems.
• Does agglomerating the Mezzogiorno mean de-agglomerating Milan and which yields greater externalities?
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Many vs. One City
• In the closed economy model, there is a real advantage to urbanites and rural people together for cities to be spread out– especially when transport costs are high.
• In an open economy, there is only an advantage to rural dwellers, and typically the urbanites would benefit by co-location.
• Holding urbanization rates constant, Europeans are 15 percent less likely to live in agglomerations of over 1 million.
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Is the rise of poor cities bad?
• Theory is ambiguous. Requires certainty about externalities when we have none.
• Externalities may be more severe in these areas, but the available Chinese and Indian data suggest that agglomeration economies may be as well.
• Growth data shows interesting correlations.
• I am left facing the challenges of urban disamenities, not wanting to ban cities.
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The Demons of Density
• Urban density spreads the flow of contagious disease and the congestion of roads
• It facilitates crime, by providing targets, facilitating escape and breaking down old social structures.
• Urban density also means higher land prices.• All of this can be handled with technology, money
or good governance.• The problems of today are probably harder than
in the past (cars, global diseases).
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The Need for Institutional Analysis
• The great urban problems are microeconomic – they hinge on externalities that multiply at density.
• The ability to address these problems relies on both technology and political competence.
• Engineers understand the technology–economists have dealt with the behavioral response– but we haven’t really addressed the urban policy– institution nexus.
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Core Ideas of Cities and Externalities
• Faced by difficult circumstances– places face a stark tradeoff between dictatorship and disorder.
• City Size increases the costs of disorder larger–crime, riots, fires, plagues.
• But can also makes order more difficult.
• Creates potential non-monotonicities, depending on which effect dominates.
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Infrastructure and Institutions
• The behavioral response problem – driving on highways to the point that they become useless–abuse of parks, sidewalks.
• The ability to regulate these uses is institutional–economists have often devised optimal pricing schemes that are not well suited for poorer places. (architects too)
• Infrastructure is hard to evaluate using randomized trials.
• Political institutional analysis is appropriate.
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Tweed Courthouse
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Author: Branille
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Congestion in Singapore
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Low Level of Building Regulation
High Level of Building Regulation
High Protection of Land Rights
Post Henry II England through19th Century.
Pre-1970 U.S.
Houston Today
Most of Europe today.
Coastal U.S. Today.
Low Protection of Land Rights Anarchy– most of human history
India
Brazil
Africa
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Marin County, California
San Mateo County, CaliforniaSanta Clara County, California
Pitkin County, Colorado
Nantucket County, Massachusetts
New York County, New York0
20
00
00
40
00
00
60
00
00
80
00
00
10
00
00
0
Med
ian H
ousin
g V
alu
e, 20
00
-.5 0 .5 1Population Growth, 2000-2010
Median Housing Value by Population Growth
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Why the combination of heavy regulations and light rule of law?
• Hypothesis # 1: Inappropriate institutional borrowing (blame the UK land use planners)
• Hypothesis # 2: Corrupt officials like all those rules (economists’ favorite– but better for explaining maintenance not origination)
• Hypothesis # 3: Cost of enforcement– ex ante prevention of construction is easy– ex post removal of extra-legal settlers is hard.
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The High Cost of Overregulating Height
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Climate Change and the City?
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0
2,0
00
4,0
00
6,0
00
8,0
00
10
,000
Ele
ctr
icity U
se p
er
Capita
(kW
h),
201
0
1 2 3 4 5Least Urbanized in Quintile 1Source: World Bank
Electricity Use per Capita, 2010by Urbanization Quintiles, 2010
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Image by QuarterCircleS
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MSA
City-Suburb
Difference in
Emissions from
Driving
City-Suburb
Difference in
Emissions from Public
Transportation
City-Suburb
Difference in
Emissions from
Home Heating
City-Suburb
Difference in
Electricity
City-Suburb
Difference in
Carbon Dioxide
Emissions Cost
(Lbs of CO2) (Lbs of CO2) (Lbs of CO2) (Lbs of CO2) ($ per Year)
New York, NY 7,105 -2,367 5,953 5,637 351
Nashville, TN 8,002 -649 1,700 4,416 290
Boston, MA 7,197 -1,091 5,863 158 261
Minneapolis-St. Paul, MN 5,934 -105 2,661 2,539 237
Washington, DC 6,128 -2,280 2,176 4,518 227
Cincinnati, OH 4,255 -383 -204 6,427 217
Atlanta, GA 6,587 -1,242 1,324 3,136 211
Philadelphia, PA 7,030 -2,286 1,221 3,519 204
Houston, TX 2,846 -561 1,597 5,379 199
Hartford, CT 6,814 -2,905 2,762 2,314 193
Top 10 MSAs
Marginal Effect: City-Suburb Differences in CO 2 Output Emissions
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The Boston Hypothesis
• Cities are part of changing institutions.
• At the simplest level, density enables the formation of crowds– riots and revolutions start in city.
• Also, the spread of ideas among malcontents (Adams and Hancock).
• But even more importantly if cities are forges of human capital, this human capital is then the stuff of forging better institutions.
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Image by Ramy Raoof