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Economic Costs and
Benefits of the Water Nexus
in the Mediterranean
Presented By:
Atif Kubursi
McMaster University
February 12, 2015
European Commission Conference on the
Water-Food-Energy-Ecosystem Nexus for
Mediterranean Countries: Turkey
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• The multiple identities of water
• Is water a reproducible consumer good?
• Is water a factor of production?
• Is water an asset?
• Specific attributes of water
• Competitive markets and water prices
• Total Economic Value (TEV) of water
Outline of Presentation I
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Outline of Presentation II
• Optimizing model: Simulating a
competitive water market
• Shadow prices and scarcity rents
• Structuring a price (tariff) of water • Opportunity cost
• Full supply cost
• Full economic cost
• Substitutability
• Economic efficiency / equity 2
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Water Attributes I
Water is a fugitive, reusable, and stochastically supplied
resource whose production can be subject to economies
of scale which give rise to natural monopoly situations. In
this respect water has many of the characteristics of a
common property resource and a quasi public good.
Water is typically a non-traded commodity that is rarely
sold in a competitive market. There are few overt water
markets where suppliers and demanders exchange
water. Markets in water rights have emerged in several
parts of the world; the most notable examples are in
Australia, Colorado, California and Argentina. But most of
these markets are within national entities and often
represent simulated market solutions.
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Water Attributes II Water values generally differ from the price that would
obtain in a free and competitive market. It is often the
case that water has social value that is above what
private users are willing to pay for it. The allocation of
water often reflects national and social policies and
priorities towards agriculture, the environment, food
security and national security that go beyond serving the
interests of private farmers. Social and policy
considerations apart, the diversion of actual prices from
their scarcity values imposes social costs on the
domestic economy as well as on neighbouring countries.
Water is part of the tragedy of the commons.
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Water Attributes III
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Water is not only a desirable commodity, its availability is
also critical for life. There are little or no substitutes for it.
Furthermore, it is a well entrenched principle that no
matter how scarce water is, every person is entitled to a
minimum quantity that is considered consistent with
human dignity.
The secure supply of water in many regions of the world
is quite low. Security of supply is defined here as the
probability of average flow availability 9 out of 10 years.
In Canada, a country rich in water, this probability is less
than 30% where as it is less than 5% in the Middle East.
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Water Attributes IV
While the total water supply may be limited and, few if any, substitutes exist for it; there exists substantial possibilities for inter-sectoral and interregional substitutions. As well, there are a number of technologies and conservation programs that rationalize demand and raise the efficiency of its use.
Part of the water scarcity crisis is the fact that agriculture on average uses about 70% of the total global supply. It is often the case that other needs are suppressed, but this leaves a wide room for inter-sectoral reallocations and shuffling water between users and uses.
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Water Attributes V
While the quantity of water is in short supply, concern for preserving its quality is perhaps more pressing. Pollution and saline intrusion of the aquifers are being increasingly recognized as critical factors in planning for the future.
Water is the “universal solvent”. It performs numerous ecosystem services including the absorption, transportation, and dilution of pollutants. Water is indispensible to the environment’s pollution abatement capacity.
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Competitive Markets and
Water Prices I
Water is a scarce resource (asset), a scarce commodity and a
scarce input. Economics is particularly suited for dealing with it as
economics after all is the study of how scarce resources are or
should be allocated to various uses and users.
Indeed, water has a price as does any scarce resource, input or
asset. There is a monetary equivalent to water although this is not
the way people typically speak about water. This price need not
emerge from competitive markets. But it has or could be constructed
to have many of the characteristics that are associated with
competitive prices. The price should reflect the scarcity of water and
should disseminate information about this relative scarcity. It should
also invite, if not provoke, the correct (incentives) responses that
prices in general are expected to do.
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Competitive Markets and
Water Prices II
It is generally accepted; however, that water is not bought
and sold in competitive markets. This is because in the
case of water at least five of the basic properties of
competitive markets are absent. These five properties
include the following:
Competitive markets include a large number of
independent small sellers and a similarly large
number of independent small buyers that no single
supplier or buyer is significant enough to influence the
price. Each and every buyer and seller in this market
is a price-taker.
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Competitive Markets and
Water Prices III
Second, competitive markets require freedom of entry
and exits and that no barriers exist that preclude easy
entrance or exit.
Third, the product must be homogeneous enough that
each unit is quite similar to any other unit.
Fourth, for a free market to lead to an efficient
allocation externalities must be absent. An efficient
allocation can emerge from a free market when social
costs coincide with private costs. Water production,
however, involves many "externalities“.
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Competitive Markets and
Water Prices IV
Fifth, in a free market that allocates efficiently scarce
resources social benefits must coincide with private
ones. If not, then (as in the case of cost externalities)
the pursuit of private ends will not lead to socially
optimal results. In the case of water, many uses have
social benefits that exceed the private ones. The use
of water in agricultural may result in benefits that
exceed the private returns to farmers. Among these
are food security, border security, and national
interest.
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Competitive Markets and
Water Prices V
The fact that water is not bought or sold in competitive
markets does not mean it does not have a price. It simply
means that this price is not the one where competitive
conditions prevail.
It is possible, however, to build specific models of water
allocations that simulate competitive conditions and where
the optimal nature of markets is restored. Such a model
can explicitly optimize the benefits to be obtained from
water, taking into account the five points made above.
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Competitive Markets and
Water Prices VI
We now have a rich body of literature that informs the setting of
water prices and tariffs to overcome some of the five points listed
above.
The prices that emerge from formal optimization models not only
maximize profits for the producers (producer surplus), but also
maximize the utility of the consumer (consumer surplus).
A multi-objective framework can be developed to design prices that
satisfy goals beyond pure economic efficiency. These constructed
prices permit the optimal allocation of water to its best uses as
would emerge under competitive conditions. In many respects, the
constructed prices are designed to serve as guides to consumers
and producers in much the same way as competitive prices.
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Simulating Competitive
Equilibrium Prices for Water
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Simulating Competitive
Equilibrium Prices for Water
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Shadow Prices and Scarcity
Rent
Harvard WAS
Property rights and Coase Theorem
Kuhn-Tucker conditions
Water values at shadow prices is
below the cost of a fighter jet
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Harvard WAS I
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Harvard WAS II
The Objective Function
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Harvard WAS III
Subject to:
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Adjusted Harvard WAS
The Equity Constraint
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Rationality and Water Use
Ranking by water intensity
Ranking by value
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Structuring an Optimal Water
Tariff
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Efficiency vs. Equity?
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0
1
2
3
4
5
6
7
8
0.5 1 1.5 2 2.5 3 3.5 4 4.5
Quantity
Pri
ce
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Water and Sustainability
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Prices need to protect susatinability by encouraging
conservation and substitution where possible.
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The Three Dimensions of
Sustainability
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Sustainability and Total
Economic Value
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Blue and Green Water
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Irrigation?
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Virtual Water and Virtual
Riparians I
Most countries ‘import’ embedded water.
160 countries are net food importers.
15% of food produced is traded
internationally.
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Virtual Water and Virtual
Riparians II
It takes 1000 tonnes (m3) of water to
produce a tonne of wheat.
16000 tonnes to produce a tonne of
beef.
Importers of food ‘export’ the water
footprint related to the food imported -
to the food exporter.
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Virtual Water and Virtual
Riparians III
Riparians are rivals
Rivers of fire
Blue Gold
Japan is a virtual riparian to Iraq and Iran
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Food Security I?
Definition of Food Security
Food security is about water security
Getting the highest value per drop of
water
Wasting water, wasting food
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Food Security II?
Food security and over exploitation of
water
Specifically Oman, Saudi Arabia, Syria,
UAE and Yemen withdrew over 80% of
their total water withdrawals for
agriculture purposes in mid 2000`s
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Food Security III?
Between 1990 and 2010, total cereal
consumption of the ESCWA region
increased by 77% while regional cereal
production increased by 38%.
Food Security and food self-sufficiency
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Water and Food Security
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The Water and Energy Nexus I
Water and energy production and
consumption are closely inter-related.
Oil production plants consume large
quantities of water.
Cooling systems in the region use large
quantities of water.
Energy is used extensively for the
production, distribution and treatment of
water. 37
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The Water and Energy Nexus II
The region is home to over 25% of the
world`s desalination facilities.
These plants are heavy consumers of
energy.
Energy availability in the region
determines water availability.
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The Water System in Jordan: A
Case Study: Anatomy of Failure I
High leakages in the water supply
network.
High prices for domestic water use (the
smaller component of demand for water)
in order to subsidize larger and more
profligate agricultural water use (the
largest component of water demand).
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The Water System in Jordan: A
Case Study: Anatomy of Failure II
Inadequate and limited use of meters,
limited monitoring and repair of existing
meters.
Inadequate administrative and physical
infrastructure resulting in large financial
losses and physical losses of water.
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The Water System in Jordan: A
Case Study: Anatomy of Failure III
Absence and/or lack of adequate water
conservation programmes and effective
government intervention to encourage
conservation.
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The Water System in Jordan: A
Case Study: Anatomy of Failure IV
Insufficient use of water- conserving
technologies – for example aerators,
low- flow flush toilets, water- and energy-
conserving household appliances, and
limited use of non- traditional and proven
irrigation technologies.
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The Water System in Jordan: A
Case Study: Anatomy of Failure V
Large amounts of water unaccounted for
in the system – as high as 60 or 70 per
cent in most governorates, 76 per cent in
Mafraq.
Inappropriate product structure with
several water-intensive crops produced
for export, such as citrus fruit and
vegetables.
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The Water System in Jordan: A
Case Study: Anatomy of Failure VI
Suboptimization in structuring prices and
crop structures.
Asymmetrical regional water shares
resulting from poor
negotiations and implementation of
water treaties.
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The Water System in Jordan: A
Case Study: Anatomy of Failure VII
Multiplicity in the administrative
structure, where clear responsibilities
and accountability structures are limited
and where overlapping responsibilities
lead to confusion and inaction.
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Conclusions
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Questions?