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Econ 414 - Urban Economics

Introduction

Marcelino Guerra

January 28, 2021

What is Urban Economics?

  • Urban Economics intersects economics and geography studying the location choices of economic activity
    • Identifies economic forces shaping the urban structure within/across cities
    • What are the costs and benefits of cities?
    • What public policies promote efficiency in cities?

What is Urban Economics?

  • Urban Economics intersects economics and geography studying the location choices of economic activity

    • Identifies economic forces shaping the urban structure within/across cities
    • What are the costs and benefits of cities?
    • What public policies promote efficiency in cities?
  • Why location matter?

    • Agglomeration forces
    • Externalities, neighborhood effects

What is Urban Economics?

  • Urban Economics intersects economics and geography studying the location choices of economic activity

    • Identifies economic forces shaping the urban structure within/across cities
    • What are the costs and benefits of cities?
    • What public policies promote efficiency in cities?
  • Why location matter?

    • Agglomeration forces
    • Externalities, neighborhood effects
  • What determines people's/firms' willingness to pay for places?

    • Why do firms stay in places where they pay high salaries?

Regularities Across cities

Population Density in the US

Household Income in the US

Regularities Within Cities

Population Density in Chicago-IL

Commuting in Chicago-IL

What are cities? What's good about it?

What are cities? What's good?

  • A city is a relatively small area that contains a large number of people

    • Three conditions must be satisfied for a city to form: Agricultural surplus, urban production, transportation system

    • The share of people living in cities in the US increased from 2% to 82% between 1700 and 2010. Technology advances caused this movement. Why?

    • Cities increase our standard of living

What are cities? What's good?

  • A city is a relatively small area that contains a large number of people

    • Three conditions must be satisfied for a city to form: Agricultural surplus, urban production, transportation system

    • The share of people living in cities in the US increased from 2% to 82% between 1700 and 2010. Technology advances caused this movement. Why?

    • Cities increase our standard of living

  • Thicker markets offer better matches between workers, firms, and consumers

    • Productivity benefits

    • Transportation costs

    • Knowledge spillovers

    • Consumer cities

Urbanization in the US

Urbanization across the World

Share of people living in slums

The cost of cities

COVID-19 Distribution across US 04/22/2020

COVID-19 Distribution across US 01/24/2021

The Economic approach to cities

The Economic approach to cities

  • Focus on people rather than places

The Economic approach to cities

  • Focus on people rather than places

  • Three key elements:

    • People respond to incentives
    • There is no free lunch (no-arbitrage equilibrium)
    • Good policies increase people's range of choices

The Economic approach to cities

  • Focus on people rather than places

  • Three key elements:

    • People respond to incentives
    • There is no free lunch (no-arbitrage equilibrium)
    • Good policies increase people's range of choices
  • Relies on a spatial equilibrium for workers, employers, and developers

    • Individuals are indifferent across space:

    Income + Amenities - Housing Costs - Transportation Costs is constant over space

    • Differences in wages must be offset by differences in productivity
    • Developers are indifferent about building or not new units

Axioms of Urban Economics

  1. Prices adjust to achieve locational equilibrium
    • Prices will adjust, so no one has the incentive to move

Axioms of Urban Economics

  1. Prices adjust to achieve locational equilibrium

    • Prices will adjust, so no one has the incentive to move
  2. Self-reinforcing effects generate extreme outcomes

    • A change in something leads to additional changes in the same direction

Axioms of Urban Economics

  1. Prices adjust to achieve locational equilibrium

    • Prices will adjust, so no one has the incentive to move
  2. Self-reinforcing effects generate extreme outcomes

    • A change in something leads to additional changes in the same direction
  3. Externalities cause inefficiencies

    • A crowded highway, air pollution, etc.

Axioms of Urban Economics

  1. Prices adjust to achieve locational equilibrium

    • Prices will adjust, so no one has the incentive to move
  2. Self-reinforcing effects generate extreme outcomes

    • A change in something leads to additional changes in the same direction
  3. Externalities cause inefficiencies

    • A crowded highway, air pollution, etc.
  4. Production is subject to Economies of Scale

    • The average cost of production decreases as output increases

Axioms of Urban Economics

  1. Prices adjust to achieve locational equilibrium

    • Prices will adjust, so no one has the incentive to move
  2. Self-reinforcing effects generate extreme outcomes

    • A change in something leads to additional changes in the same direction
  3. Externalities cause inefficiencies

    • A crowded highway, air pollution, etc.
  4. Production is subject to Economies of Scale

    • The average cost of production decreases as output increases
  5. Competition generates zero economic profit

    • Zero economic profit means earning "normal" accounting profit

What is Urban Economics?

  • Urban Economics intersects economics and geography studying the location choices of economic activity
    • Identifies economic forces shaping the urban structure within/across cities
    • What are the costs and benefits of cities?
    • What public policies promote efficiency in cities?
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