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NotesESS HLTopic 9.2Use and non-use values
Back to ESS HL Topics
9.2.86 min read

Use and non-use values (ESS HL)

IB Environmental Systems and Societies • Unit 9

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Contents

  • Use and non-use values at Higher Level
  • Use values and non-use values
  • Use values: set by use
  • Non-use values
  • Surveys: willingness to pay and to accept
  • Problems with valuation surveys
  • Exam-style question
Use and non-use values at Higher Level: This statement belongs to the HL lens on environmental economics. Some of nature's value shows up when people use it; much of it does not. This page shows how both kinds are put into money, and why surveys are needed.

Practise this as you read

  • Distinguish between use values and non-use values, with examples.
  • Outline how willingness to pay and willingness to accept are measured.
  • Evaluate valuation surveys, using the Exxon Valdez oil spill.

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Used, or simply valued: A resource can have a use value and a non-use value. Use values can be put into money through use; non-use values cannot.

The points to remember

  • Use values: from using the resource, e.g. fish caught, a dive trip, flood protection.
  • Non-use values: valued even if never used.
  • Non-use includes intrinsic (existence) value: a species has value in itself.
  • Non-use includes future use (option value): e.g. medicines not yet found.
  • Non-use includes value for future generations (bequest value).
Remember it as: Use it, or just know it is there.
Table of the values of a coral reef. Direct use: fish caught and dive trips, valued by market price and travel cost. Indirect use: breaking storm waves, valued by replacement cost. Option (non-use): medicines not found yet, valued by a willingness-to-pay survey. Existence or intrinsic (non-use): turtles simply surviving, valued by willingness-to-pay or willingness-to-accept survey. Bequest (non-use): a reef for grandchildren, valued by a willingness-to-pay survey.
One reef, five kinds of value.
Future use counts as non-use: Some books call the potential for future use (option value) a use value. Follow the guide: it is a non-use value, because no one is using it yet.

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When people pay for a resource, or spend money to use it, its use value can be read from what they spend.

Establishing use values

  • Use values can be established by use: people buy, sell or travel for them.
  • Market price: what timber, fish or crops sell for.
  • Travel cost: what visitors spend to reach a park or reef.
  • Replacement cost: what it would cost to do the same job artificially.
  • Indirect use, such as clean water from a forest, is valued by what it saves.
Real example: New York City's water: In 1997 New York City chose to protect the forests and farms of its Catskill and Delaware watershed for about US$1.5 billion, instead of building a filtration plant costed at US$6-8 billion. The replacement cost showed what the land's clean water was worth.

Many people value a whale, a rainforest or a reef they will never see. This is a non-use value, and it includes the intrinsic value of a species.

Why non-use values are hard to price

  • Non-use values have no market: no one buys or sells them.
  • So they cannot be established by use; they must be estimated.
  • Ignoring them makes nature look cheaper than people really think it is.
  • They matter most for rare species and remote places few people visit.

Use value: a reef

  • Fish sold at market
  • Divers pay for trips
  • Waves broken before the coast

Non-use value: the same reef

  • Turtles survive, even if unseen
  • Medicines may be found later
  • The reef is left for grandchildren

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Non-use values are estimated by contingent valuation: asking people their willingness to pay for a common good, or their willingness to accept for its destruction.

Surveys: willingness to pay and to accept

  • Surveys (contingent valuation) estimate non-use values.
  • Willingness to pay (WTP): how much would you pay to protect this common good?
  • Willingness to accept (WTA): how much compensation would you accept for its destruction?
  • Answers are multiplied up for the whole population, giving a total value.
  • The guide's example: the Exxon Valdez oil spill, Alaska, 1989.

Spill

  • 24 March 1989: the tanker Exxon Valdez ran aground in Prince William Sound. About 41 million litres of oil spilled.

Use losses

  • Fishing seasons were closed and fewer tourists came: losses with a market price.

Non-use losses

  • About 250,000 seabirds and 2,800 sea otters died, in a place most Americans will never visit.

Survey

  • In 1991 US households were asked what they would pay to prevent another such spill. Lost non-use value: about US$2.8 billion.

Surveys are the only way to put a number on non-use values, but the numbers are open to question.

Problems with valuation surveys

  • The questions are hypothetical: people do not really pay.
  • Answers depend on income: richer people can say more.
  • WTA is usually much higher than WTP for the same thing.
  • Some people refuse to put a price on nature at all (protest answers).
  • Results depend on how the question is worded.
Real example: Deepwater Horizon, 2010: After the Deepwater Horizon rig exploded in the Gulf of Mexico in 2010, researchers asked 3,646 US households if they would vote for a one-time tax to prevent such harm. The average household would pay US$153, about US$17.2 billion for the whole country (published 2017).

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How this could come up: No paper has asked this statement yet. Likely shapes: Paper 2 Section B (a), outline [4]; a Paper 1 lens question, 'Through the lens of economics, suggest...' [6]; Section A data on a valuation survey [1-3].
IB-style questionOutline[4 marks]

The Amazon rainforest supplies timber, Brazil nuts and medicines, and is home to jaguars and many species that few people will ever see.

Outline two use values and two non-use values of the Amazon rainforest.

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IB Exam Questions on Use and non-use values

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How Use and non-use values Appears in IB Exams

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Define

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AO1
Describe

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Explain

Give reasons WHY — cause and effect within Use and non-use values.

AO3
Evaluate

Weigh strengths AND limitations of approaches in Use and non-use values.

AO3
Discuss

Present arguments FOR and AGAINST with a balanced conclusion.

AO3

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Related ESS HL Topics

Continue learning with these related topics from the same unit:

9.1.1What laws are
9.1.2What environmental law covers
9.1.3Environmental law, justice and lobbying
9.1.4Making environmental law work
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