Common-pool resource

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In economics, a common-pool resource (CPR) is a type of good consisting of a natural or human-made resource system (e.g. an irrigation system or fishing grounds), whose size or characteristics makes it costly, but not impossible, to exclude potential beneficiaries from obtaining benefits from its use. Unlike pure public goods, common pool resources face problems of congestion or overuse, because they are subtractable. A common-pool resource typically consists of a core resource (e.g. water or fish), which defines the stock variable, while providing a limited quantity of extractable fringe units, which defines the flow variable. While the core resource is to be protected or nurtured in order to allow for its continuous exploitation, the fringe units can be harvested or consumed.[1]

Common property systems[edit]

A common property rights regime system (not to be confused with a common-pool resource) is a particular social arrangement regulating the preservation, maintenance, and consumption of a common-pool resource. The use of the term "common property resource" to designate a type of good has been criticized, because common-pool resources are not necessarily governed by common property protocols. Examples of common-pool resources include irrigation systems, fishing grounds, pastures, forests, water or the atmosphere. A pasture, for instance, allows for a certain amount of grazing to occur each year without the core resource being harmed. In the case of excessive grazing, however, the pasture may become more prone to erosion and eventually yield less benefit to its users. Because the core resources are vulnerable, common-pool resources are generally subject to problems of congestion, overuse, pollution, and potential destruction unless harvesting or use limits are devised and enforced.[2]

Resource systems like pastoral areas, fishing grounds, forest areas are storage variables.[3] Under favorable conditions, they can maximize the flow without harming the total storage volume and the entire resource system. Different from the resource system, the resource unit is the amount that an individual occupies or uses from the resource system, such as the total amount of fish caught in a fishing ground, the amount of feed consumed by livestock in pastoral areas.[4] A resource system allows multiple people or enterprise to produce at the same time, and the process of using common-pool resources can be performed simultaneously by multiple occupants. However, the resource unit cannot be used by multiple people or enterprises at the same time.[3]


The use of many common-pool resources, if managed carefully, can be extended because the resource system forms a negative feedback loop, where the stock variable continually regenerates the fringe variable as long as the stock variable is not compromised, providing an optimum amount of consumption. However, consumption exceeding the fringe value reduces the stock variable, which in turn decreases the flow variable. If the stock variable is allowed to regenerate then the fringe and flow variables may also recover to initial levels, but in many cases the loss is irreparable.[2]


Common-pool resources may be owned by national, regional or local governments as public goods, by communal groups as common property resources, or by private individuals or corporations as private goods. When they are owned by no one, they are used as open access resources. Having observed a number of common pool resources throughout the world, Elinor Ostrom noticed that a number of them are governed by common property protocols — arrangements different from private property or state administration — based on self-management by a local community. Her observations contradict claims that common-pool resources must be privatized or else face destruction in the long run due to collective action problems leading to the overuse of the core resource[2] (see also Tragedy of the commons).

Definition matrix[edit]

Excludable Non-excludable
Rivalrous Private goods
food, clothing, cars, parking spaces
Common-pool resources
fish stocks, timber, coal, free public transport
Non-rivalrous Club goods
cinemas, private parks, satellite television, public transport
Public goods
free-to-air television, air, national defense, free and open-source software

Common property protocols[edit]

Common property systems of management arise when users acting independently threaten the total net benefit from common-pool resource. In order to maintain the resources, protocols coordinate strategies to maintain the resource as a common property instead of dividing it up into parcels of private property. Common property systems typically protect the core resource and allocate the fringe resources through complex community norms of consensus decision-making.[5] Common resource management has to face the difficult task of devising rules that limit the amount, timing, and technology used to withdraw various resource units from the resource system. Setting the limits too high would lead to overuse and eventually to the destruction of the core resource while setting the limits too low would unnecessarily reduce the benefits obtained by the users.

In common property systems, access to the resource is not free and common-pool resources are not public goods. While there is relatively free but monitored access to the resource system for community members, there are mechanisms in place which allow the community to exclude outsiders from using its resource. Thus, in a common property state, a common-pool resource appears as a private good to an outsider and as a common good to an insider of the community. The resource units withdrawn from the system are typically owned individually by the appropriators. A common property good is rivaled in consumption.

Analysing the design of long-enduring CPR institutions, Elinor Ostrom identified eight design principles which are prerequisites for a stable CPR arrangement:[6]

  1. Clearly defined boundaries
  2. Congruence between appropriation and provision rules and local conditions
  3. Collective-choice arrangements allowing for the participation of most of the appropriators in the decision making process
  4. Effective monitoring by monitors who are part of or accountable to the appropriators
  5. Graduated sanctions for appropriators who do not respect community rules
  6. Conflict-resolution mechanisms which are cheap and easy to access
  7. Minimal recognition of rights to organize (e.g., by the government)
  8. In case of larger CPRs: Organisation in the form of multiple layers of nested enterprises, with small, local CPRs at their bases.

Common property systems typically function at a local level to prevent the overexploitation of a resource system from which fringe units can be extracted. In some cases, government regulations combined with tradable environmental allowances (TEAs) are used successfully to prevent excessive pollution, whereas in other cases — especially in the absence of a unique government being able to set limits and monitor economic activities — excessive use or pollution continue.

Adaptive governance[edit]

The management of common-pool resources is highly dependent upon the type of resource involved. An effective strategy at one location, or of one particular resource, may not be necessarily appropriate for another. In The Challenge of Common-Pool Resources, Ostrom makes the case for adaptive governance as a method for the management of common-pool resources. Adaptive governance is suited to dealing with problems that are complex, uncertain and fragmented,[7] as is the management of common-pool resources. Ostrom outlines five basic protocol requirements for achieving adaptive governance.[8] These include:

  • Achieving accurate and relevant information, by focusing on the creation and use of timely scientific knowledge on the part of both the managers and the users of the resource
  • Dealing with conflict, acknowledging the fact that conflicts will occur, and having systems in place to discover and resolve them as quickly as possible
  • Enhancing rule compliance, through creating responsibility for the users of a resource to monitor usage
  • Providing infrastructure, that is flexible over time, both to aid internal operations and create links to other resources
  • Encouraging adaption and change to address errors and cope with new developments

Influential factors in the management of common-pool resources[edit]

A new proposal of the management of CPR is to develop autonomous organizations that are not completely privatized and controlled by government power, which led and supervised by the community to manage common-pool resources in addition to directly through the government and the free market.[9] There are many factors that may affect the formation and development of these kinds of autonomous organizations.[10] Effectively identifying the influencing factors of the autonomous management system of CPRs increasing the feasibility of the system, and it is more conducive to the sustainable use of resources as well.[11]

In general, there are four variables that are very important for local common-pool resource management: (1) characteristics of the resource; (2) characteristics of the resource-dependent group; (3) institutional model of resource management; (4) the relationship between groups, external forces, and authorities.[10]

The government, market and interest groups are all considered as external forces that have an impact on CPR management system. Changes in market demand for CPR, in particular, technological innovation increases productivity and lowers costs, which undermines the sustainability of the management system.[9] In order to develop more resources, resource owners may seek to change the ownership of resources in the form of cooperation with the government, privatize CPR or even cancel the protection of CPR ownership by regulations. Such institutional changes prevent the implementation of policies that are beneficial to the majority of the population, while the power of the government and bureaucracy can be abused.[10]

The community is responsible for supervising and administering CPR under an autonomous management system, the characteristics of a community can affect how CPR is managed.[12] (1) the size of the community. The level of cooperation decreases as the number of community members grows; (2) Allocation mechanism for CPR. Encouraging the exploitation of the least used resources and reducing the exploitation of the most used resources will effectively increase the rate of resource supply and reduce the rate of resource consumption and individual demand. (3) Group identity. When people in a community have a strong sense of group identity, it helps to manage CPR within the community.[13]

Open access resources[edit]

In economics, open access resources are, for the most part, rivalrous, non-excludable goods. This makes them similar to common goods during times of prosperity. Unlike many common goods, open access goods require little oversight or may be difficult to restrict access.[2] However, as these resources are first come, first served, they may be affected by the phenomenon of the tragedy of the commons.[14] Two possibilities may follow: a common property or an open access system.

An open access system is set up to continue the ideals of an open access resource in which everything is up for grabs, e.g., land. This occurred during the expansion of the U.S. west where thousands of acres were given away to the first one to claim and work the land.[15]

However, in a different setting, such as fishing, there will be drastically different consequences. Since fish are an open access resource, it is relatively simple to fish and profit. If fishing becomes profitable, there will be more fishers and fewer fish. Fewer fish lead to higher prices which will lead again to more fishers, as well as lower reproduction of fish. This is a negative externality and an example of problems that arise with open access goods.[16]

See also[edit]



  1. ^ Ostrom, Elinor (1990). Governing the Commons: The Evolution of Institutions for Collective Action. Cambridge, UK: Cambridge University Press. ISBN 0-521-40599-8.
  2. ^ a b c d Environmental Economics Dictionary (2008-04-30). "Open Access Resource definition | Environmental Economics Dictionary". Archived from the original on 2013-07-03. Retrieved 2014-01-19.
  3. ^ a b Ostrom, E. (1990). Governing the Commons: The Evolution of Institutions for Collective Action (Canto Classics). Cambridge: Cambridge University Press. doi:10.1017/CBO9781316423936
  4. ^ Ostrom, Elinor (1977). Public Goods and Public Choices. Alternatives for Delivering Public Services. ISBN 9780429047978.
  5. ^ Mandal, B.N. (2009). Global Encyclopaedia of Welfare Economics. Global Vision Publishing House. ISBN 978-8182202597.
  6. ^ Ostrom, Elinor (1990). Governing the commons: the evolution of institutions for collective action. Cambridge University Press.[page needed]
  7. ^ "UNU-IAS. (2011). "Adaptive Governance". United Nations University". 2006-08-18. Archived from the original on 2012-08-02. Retrieved 2014-01-19.
  8. ^ Ostrom, Elinor. (2010). "The Challenge of common-pool resources". In: Environment: Science and Policy for Sustainable Development, 50:4, 8-21. [1]
  9. ^ a b Ostrom, Elinor; Gardner, Roy; Walker, James; Walker, James M.; Walker, Jimmy (1994). Rules, Games, and Common-pool Resources. University of Michigan Press. ISBN 978-0-472-06546-2.
  10. ^ a b c Ostrom, E. (1990). Governing the Commons: The Evolution of Institutions for Collective Action (Canto Classics). Cambridge: Cambridge University Press. doi:10.1017/CBO9781316423936
  11. ^ Castilla-Rho J.C., Holley C., Castilla J.C. (2020) Groundwater as a Common Pool Resource: Modelling, Management and the Complicity Ethic in a Non-collective World. In: Valera L., Castilla J. (eds) Global Changes. Ethics of Science and Technology Assessment, vol 46. Springer, Cham.
  12. ^ Ostrom, Elinor (1977). Public Goods and Public Choices. Alternatives for Delivering Public Services. ISBN 9780429047978.
  13. ^ Ostrom, Elinor (2008-07-01). "The Challenge of Common-Pool Resources". Environment: Science and Policy for Sustainable Development. 50 (4): 8–21. doi:10.3200/ENVT.50.4.8-21. ISSN 0013-9157.
  14. ^ Tietenberg, T. (20 September 2006). "Open access resources". Encyclopedia of Earth. Retrieved 4 July 2017.
  15. ^ Reggio, Michael H. (2009). "Cheyenne-Arapaho Opening". In Everett, Dianna (ed.). Encyclopedia of Oklahoma History and Culture. Oklahoma City, OK: Oklahoma Historical Society. ISBN 9780941498753. Retrieved 4 July 2017.
  16. ^ Mackenzie, John (2014). "Market Failures: Open-Access Resources, Public Goods, Etc". Archived from the original (lecture notes) on 3 November 2017. Retrieved 4 July 2017.


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