
- •Contents
- •Preface
- •Acknowledgments
- •Table of cases
- •Table of statutes
- •Table of statutory instruments
- •Table of treaties
- •Table of EC legislation
- •1 Property law: the issues
- •1.1. Basic definition
- •1.2. Illustrative example
- •1.2.1. John
- •1.2.1.1. The unexcised body cell and the question of ownership
- •1.2.1.2. John’s interest in the excised body cell
- •1.2.1.3. Continuity of interests and John’s interest in the cell line
- •1.2.1.4. Enforceability of John’s interest in the cell line
- •1.2.2. Dr A and Dr B and the acquisition and transmission of property interests
- •1.2.3. The drugs company: constraints on the exercise of property rights
- •Notes and Questions 1.1
- •2 What we mean by ‘property’
- •2.1. Introduction
- •2.1.1. Property as a relationship and as a thing
- •2.1.2. Conceptualising ‘things’
- •2.1.3. Distinguishing property rights from other rights relating to things
- •2.1.4. Rights and other entitlements: Hohfeld’s rights analysis
- •2.1.4.1. Rights and duties, privileges and no-rights
- •2.1.4.2. Privileges and no-rights, and powers and liabilities
- •Abandonment
- •Effect of restrictions on alienation rights
- •2.1.4.3. Powers and liabilities, immunities and disabilities
- •2.1.5. Hohfeldian analysis of dynamic property relationships
- •2.1.5.1. Stage 1: Before the grant of the option
- •2.1.5.2. Stage 2: Grant of the option
- •2.1.5.3. Stage 3: Exercise of the option
- •2.1.6. Property rights, property interests and ownership
- •Notes and Questions 2.1
- •2.2. Private property, communal property, state property and no property
- •2.2.1. Introduction
- •2.2.2.1. No-property: ownerless things
- •2.2.2.2. Open access communal property
- •Distinction between open access and limited access communal property
- •Distinction between open access communal property and no property
- •Distinction between open access communal property and state property
- •Distinction between allocation and provision of resources
- •Regulation of communal property
- •2.2.2.3. Limited access communal property
- •Distinction between communal property and co-ownership
- •Particular use rights rather than general use rights
- •2.2.2.4. State property
- •2.2.2.5. Anticommons property
- •2.3. Economic analysis of property rights
- •2.3.1. What economic analysis seeks to achieve
- •Notes and Questions 2.2
- •2.3.2. Key concepts in the economic analysis of property rights
- •2.3.2.1. Externalities
- •2.3.2.2. Transaction costs
- •Imperfect information
- •Costs of collective action
- •Free-riders and holdouts
- •2.3.2.3. Efficiency
- •Value
- •Pareto efficiency
- •Kaldor-Hicks efficiency
- •2.4. Things as thing and things as wealth
- •2.4.1. Functions of things
- •2.4.2. The idea of a fund
- •2.4.3. Thing versus wealth
- •2.4.4. Related conceptions
- •2.4.4.1. Fungibles and non-fungibles
- •2.4.4.2. ‘Use value’ and ‘exchange value’
- •2.4.4.3. Property and personhood
- •Use value/exchange value
- •A functional distinction
- •Notes and Questions 2.3
- •3 Justifications for property rights
- •3.1. Introduction: general and specific justifications
- •3.2. Economic justification of property rights
- •3.2.1. Property and scarcity
- •Notes and Questions 3.1
- •3.2.2. Viability of single property systems
- •3.2.3. Criteria for measuring the success of a particular form of ownership
- •3.3. John Locke’s justification for private property
- •3.3.1. What Locke was attempting to establish
- •3.3.2. The political context
- •3.3.3. The problem of consent
- •3.3.4. Locke’s justification for original acquisition
- •3.3.5. The nature of Locke’s commons
- •3.3.6. Why mixing labour with a thing should give rise to entitlement
- •3.3.7. The sufficiency proviso
- •3.3.8. The spoilation proviso
- •3.3.9. The theological dimension to Locke’s theory
- •3.3.10. Present relevance of Locke’s theory
- •Notes and Questions 3.2
- •4 Allocating property rights
- •4.1. Introduction
- •4.2. The first occupancy rule
- •4.2.1. Intuitive ordering
- •4.2.2. Preservation of public order
- •4.2.3. Simplicity
- •4.2.4. Signalling
- •4.2.5. The bond between person and possessions
- •4.2.6. The libertarian justification
- •4.2.7. The communitarian objection
- •4.2.8. Economic efficiency
- •Notes and Questions 4.1
- •4.3. New things
- •Notes and Questions 4.2
- •4.4. Capture
- •Notes and Questions 4.3
- •5.2. Iron-holds-the-whale
- •5.3. Split ownership
- •4.5. Colonisation and property rights
- •4.5.1. Introduction
- •4.5.2. The Milirrpum decision and the doctrine of terra nullius
- •4.5.3. Mabo (No. 2)
- •4.5.3.1. Terra nullius
- •4.5.3.2. Property, sovereignty and the doctrine of radical title
- •4.5.3.3. Extinguishment
- •Express extinguishment
- •Implied extinguishment by inconsistent grant
- •Abandonment
- •Surrender but not alienation
- •Notes and Questions 4.4
- •4.5.4. Developments since Mabo (No. 2)
- •5 Personal and proprietary interests
- •5.1. Characteristics of proprietary interests
- •5.1.1. General enforceability
- •5.1.2. Identifiability of subject-matter
- •5.1.2.1. The basic principle
- •5.1.2.2. Fluctuating assets
- •5.1.3. Significance of alienability
- •5.1.3.1. Inalienability of communal property
- •5.1.3.2. Status rights
- •5.1.3.3. Appurtenant rights
- •5.1.4. Requirement for certainty
- •5.1.5. The numerus clausus of property interests
- •5.1.6. Vindication of property rights
- •5.1.7. Termination
- •5.1.7.1. Abandonment
- •5.1.7.2. Disclaimer
- •5.1.7.3. Forfeiture
- •5.1.8. Property rights and insolvency
- •5.2. Special features of communal property rights
- •5.2.1. Present scope of communal property
- •5.2.1.1. Rights of common
- •5.2.1.2. Customary rights
- •Notes and Questions 5.1
- •5.3. Aboriginal land rights
- •5.3.1. Nature of native title
- •5.3.2. Alienability
- •5.3.3. Abandonment
- •5.3.4. Variation
- •5.3.5. Extent of native title
- •5.3.6. Is native title proprietary?
- •5.3.6.1. Blackburn J’s view in Milirrpum
- •5.3.6.2. The view of the High Court in Mabo (No. 2)
- •5.3.6.3. The Canadian view
- •Notes and Questions 5.2
- •6 Ownership
- •6.1. The nature of ownership
- •6.1.1. The basis of ownership
- •6.1.1.1. Ownership and people
- •6.1.1.2. Ownership and things
- •6.1.2. An outline of the difficulties encountered in any consideration of ownership
- •6.1.2.1. The different meanings of ownership
- •6.1.2.2. Disagreements about ownership
- •6.1.2.3. Contradictions within ownership
- •6.1.2.4. The division of ownership
- •Between different types of owner
- •Between owners and non-owners
- •Notes and Questions 6.1
- •Notes and Questions 6.2
- •6.2. The contents of ownership
- •Notes and Questions 6.3
- •Notes and Questions 6.4
- •6.3. The roles played by ownership
- •6.3.1. As a legal term of art
- •6.3.1.1. Ownership’s role in land
- •6.3.1.2. Ownership’s role in chattels
- •6.3.1.3. Ownership’s role in legislation
- •6.3.2. As an amorphous notion
- •6.3.2.1. Ownership as an organising idea
- •6.3.2.2. Ownership as a contested concept
- •6.4. The limitations of ownership
- •6.4.1. Nuisance
- •6.4.1.1. A brief introduction to nuisance
- •Public nuisance
- •Private nuisance
- •6.4.1.2. The requirements of private nuisance
- •6.4.1.3. Private nuisance and private property
- •What is protected?
- •6.4.1.4. The allocation of entitlements
- •The traditional criteria
- •The role of the market
- •The role of public policy
- •6.4.1.5. The protection of entitlements
- •Property rules
- •Liability rules
- •Rules of inalienability
- •Notes and Questions 6.5
- •Notes and Questions 6.6
- •Notes and Questions 6.7
- •Notes and Questions 6.8
- •Notes and Questions 6.9
- •A. Property and liability rules
- •B. Inalienable entitlements
- •Notes and Questions 6.10
- •6.5. Restrictive covenants
- •Notes and Questions 6.11
- •Notes and Questions 6.12
- •7 Possession
- •7.1. The nature of possession
- •7.1.1. Introduction
- •7.1.2. Possession, ownership and proprietary interests
- •7.1.3. What is possession?
- •7.1.3.1. Factual control
- •The relevance of title
- •The nature of the thing possessed
- •The purpose for which the thing is used
- •Control through agents and control of contents
- •7.1.3.2. Intention required
- •Intention to exclude
- •Effect of ignorance
- •Notes and Questions 7.1
- •7.2. Possession of land
- •7.2.1. Leases and licences
- •7.2.1.1. Why the distinction matters
- •7.2.1.2. Distinguishing leases from licences
- •Notes and Questions 7.2
- •7.2.2. Possession and particular use rights
- •7.2.2.1. General and particular use rights
- •7.2.2.2. Compatibility of particular and general use rights
- •7.3. Possession of goods: bailment
- •7.3.1. Nature of bailment
- •7.3.2. Rights, duties and obligations of bailor and bailee
- •7.4. Protection of possession
- •7.4.1. Protection of property rights by protection of possession
- •7.4.2. Tort and the protection of property rights
- •7.4.2.1. The role of tort in the protection of property rights
- •7.4.2.2. Scope of the property torts
- •Conversion
- •What amounts to a conversion of goods?
- •Remedies
- •Trespass
- •What amounts to trespass
- •Remedies
- •7.4.3. Self-help remedies
- •7.4.3.1. Survival of self-help remedies
- •7.4.3.2. Restrictions and deterrents
- •7.4.4. Unlawful eviction and harassment
- •7.4.5. Trespassing and the criminal law
- •Notes and Questions 7.3
- •8 Fragmentation of ownership
- •8.1. Introduction
- •8.2. Present and future interests
- •8.2.1. Interests in possession, in reversion and in remainder
- •8.2.2. Absolute entitlements, contingent entitlements and mere expectancies
- •8.2.2.1. Absolute entitlements
- •8.2.2.2. Contingent interests and expectancies
- •8.2.2.3. Alternative contingencies
- •8.2.3. When interests vest
- •8.2.4. Alienation, management and control
- •8.2.5. Interests of contingent duration
- •8.2.5.1. Determinable interests
- •8.2.5.2. Interests subject to a condition subsequent
- •8.2.5.3. Distinguishing determinable and forfeitable interests
- •8.2.6. Requirement of certainty
- •8.2.7. Successive interests in land and the doctrine of tenures and estates
- •8.2.7.1. Tenures and estates
- •8.2.7.2. Estates in particular use rights
- •8.2.7.3. Leases
- •8.2.8. Restrictions on the power to create future interests
- •8.3. Legal and equitable interests
- •8.3.1. Origin of the legal/equitable distinction
- •8.3.1.1. Failed formality interests
- •8.3.1.2. Novel interests
- •8.3.2. Legal and equitable interests now
- •8.3.2.1. Interests in land
- •8.3.2.2. Interests in goods
- •8.3.3. The significance of the legal/equitable distinction
- •8.3.4. Three common fallacies
- •8.3.4.1. Equitable interests and beneficial interests
- •8.3.4.2. Over-identification of equitable interests with trusts
- •8.3.4.3. Absolute ownership does not include equitable beneficial ownership
- •Notes and Questions 8.1
- •8.4. Fragmentation of management, control and benefit
- •8.4.1. Corporate property holding
- •8.4.2. Managerial property holding
- •8.4.2.1. Trust
- •The trustee
- •The settlor
- •The beneficiaries
- •8.4.2.2. Administration of property on death
- •8.4.2.3. Bankruptcy and liquidation
- •Notes and Questions 8.2
- •8.5. Group ownership
- •8.6. General and particular use rights
- •Notes and Questions 8.3
- •9 Recognition of new property interests
- •9.1. Why are certain interests regarded as property?
- •9.1.1. The function of property
- •9.1.1.1. As a means of allocating scarce resources
- •9.1.1.2. As an incentive to promote their management
- •9.1.1.3. As a moral, philosophical or political statement
- •9.1.2. The danger of property
- •9.1.3. The requirements of property
- •9.2. The dynamic nature of property
- •9.2.1. The recognition and limits of the covenant as a proprietary interest
- •Notes and Questions 9.1
- •9.2.2. The recognition of a proprietary right to occupy the matrimonial home
- •Notes and Questions 9.2
- •9.3. The general reluctance to recognise new property rights
- •9.3.1. The facts of Victoria Park Racing v. Taylor
- •9.3.2. The views of the majority
- •9.3.3. The views of the minority
- •9.3.4. The significance of the case
- •Notes and Questions 9.3
- •9.4. A comparative confirmation and an economic critique
- •Notes and Questions 9.4
- •9.5. The future of property
- •9.5.1. The new property thesis
- •Notes and Questions 9.5
- •Notes and Questions 9.6
- •10 Title
- •10.1. What we mean by ‘title’
- •10.2. Acquiring title: derivative and original acquisition of title
- •10.2.1. Derivative acquisition: disposition or grant
- •10.2.2. Original acquisition
- •10.3. Relativity of title
- •10.4. Proving title
- •10.4.1. Role of registration
- •10.4.2. Possession as a root of title
- •10.4.3. Provenance
- •10.4.4. Extinguishing title by limitation of action rules
- •10.4.5. Relativity of title and the ius tertii
- •10.5. The nemo dat rule
- •10.5.1. Scope of the nemo dat rule
- •10.5.2. General principles applicable to all property
- •10.5.2.1. Registration and the nemo dat rule
- •10.5.2.2. Dispositions to volunteers
- •10.5.2.3. Powers of sale
- •10.5.3. The application of the nemo dat rule to goods
- •10.5.4. The application of the nemo dat rule to money
- •10.5.5. The application of the nemo dat rule to land
- •10.5.5.1. The general principle
- •10.5.5.2. After-acquired property
- •10.5.5.3. Interests by estoppel
- •10.6. Legal and equitable title
- •11 Acquiring title by possession
- •11.1. Introduction
- •11.2. The operation of adverse possession rules
- •11.2.1. Unregistered land
- •11.2.2. Registered land
- •11.2.3. What counts as ‘adverse’ possession
- •11.2.4. Effect on third party interests
- •11.3. Why established possession should defeat the paper owner
- •11.4. Adverse possession and registration
- •11.5. Good faith and the adverse possessor
- •1. Tension between principle and proof
- •Notes and Questions 11.1
- •A. Lockean entitlement
- •B. Utilitarianism
- •C. Property and personhood
- •B. Property theory and adverse possession
- •Notes and Questions 11.2
- •Notes and Questions 11.3
- •Stale claims in registered land
- •Stale claims under the 2002 Act
- •Distinguishing the ‘good’ squatter from the ‘bad’ squatter
- •Problems of proof
- •Effect of the 2002 Act changes on the incidence of adverse possession
- •The incompatibility argument
- •Notes and Questions 11.4
- •11.6. Goods
- •11.6.1. Taking and theft
- •11.6.2. Protection of title by tort
- •11.6.3. The Limitation Act 1980 and title to goods
- •11.6.4. Finders
- •Notes and Questions 11.5
- •12 Transfer and grant
- •12.1. Derivative acquisition
- •12.2. Formalities
- •12.2.1. Nature and content of formalities rules
- •12.2.2. Registration and electronic transactions
- •12.2.3. Validity and enforceability against third parties
- •12.2.4. Effect of compliance on passing of title
- •12.2.5. Transactions excepted from formalities rules
- •12.2.5.1. Equitable modification of legal rules
- •12.2.5.2. Implied rights
- •12.2.5.3. Rights acquired by possession or prescription
- •12.2.6. Deeds and prescribed forms
- •12.2.7. Why have formalities rules
- •12.2.7.1. The evidentiary function
- •12.2.7.2. The cautionary function
- •12.2.7.3. The channelling function
- •12.2.7.4. Other functions
- •Clarifying terms
- •Publicity
- •State functions
- •12.2.8. Disadvantages
- •12.2.8.1. Hard cases
- •12.2.8.2. Costs
- •Notes and Questions 12.1
- •Notes and Questions 12.2
- •12.3. Contractual rights to property interests
- •12.3.1. Estate contracts and the rule in Walsh v. Lonsdale
- •12.3.2. Application to property other than land
- •12.3.3. The failed formalities rule
- •12.3.3.1. The general rule
- •12.3.3.2. The failed formalities rule as it applies to land
- •12.3.3.3. Failed formalities rule as it applies to other property
- •Notes and Questions 12.3
- •Notes and Questions 12.4
- •12.3.4. Options to purchase, rights of pre-emption and rights of first refusal
- •Notes and Questions 12.5
- •Notes and Questions 12.6
- •12.4. Unascertained property
- •12.4.1. The problem of identification
- •12.4.2. Unascertained goods
- •12.4.3. Other unascertained property
- •Notes and Questions 12.7
- •13 Acquiring interests by other methods
- •13.1. Introduction
- •13.2. The difference between adverse possession and prescription
- •13.3. Why long use should give rise to entitlement
- •13.4. Rationale
- •13.4.1. Ascendancy of the presumed grant rationale
- •13.4.2. Effect of the ‘revolting fiction’
- •13.5. When long use gives rise to a prescriptive right
- •13.5.1. The problem of negative uses
- •13.5.2. Rights that can be granted but not acquired by prescription
- •13.6. User as of right and the problem of acquiescence
- •13.7. The future of prescription
- •Recommendation in favour of abolition
- •Minority view in favour of retention
- •Notes and Questions 13.1
- •14 Enforceability and priority of interests
- •14.1. Rationale of enforceability and priority rules
- •14.2. Enforceability and priority rules
- •14.2.1. The basic rules
- •14.2.2. Impact of registration
- •Notes and Questions 14.1
- •14.3. The doctrine of notice
- •14.3.1. Notice
- •14.3.2. Good faith
- •14.3.3. Effectiveness of the doctrine of notice as an enforceability rule
- •Notes and Questions 14.2
- •14.4. Overreaching
- •14.4.1. Nature and scope of overreaching
- •14.4.2. Operation of overreaching
- •14.4.3. Overreaching the interests of occupying beneficiaries
- •14.4.4. Transactions capable of overreaching beneficiaries’ interests
- •14.4.5. The two-trustees rule
- •Introductory
- •Overreaching
- •Safeguard for beneficiaries
- •Change of circumstances
- •Protecting occupation of property
- •Principal recommendation
- •Notes and Questions 14.3
- •15 Registration
- •15.1. What are registration systems for?
- •15.2. Characteristics of the English land registration system
- •15.2.1. Privacy
- •15.2.2. Comprehensiveness
- •15.2.3. Boundaries
- •15.2.4. Restricted class of registrable interests
- •15.2.4.1. Distinguishing ‘substantive’ registration and ‘protection’ on the register
- •15.2.4.2. Registration
- •15.2.4.3. ‘Protection’ by notice or restriction
- •15.2.4.4. The overriding interest class
- •15.2.5. The mirror, curtain and guarantee principles
- •THE ‘MIRROR PRINCIPLE’
- •THE ‘CURTAIN PRINCIPLE’
- •15.2.6. Consequences of non-registration
- •Notes and Questions 15.1
- •Compulsory use of electronic conveyancing
- •Do-it-yourself conveyancing
- •The objective of the power
- •The application of the power
- •Notes and Questions 15.2
- •15.3. Enforceability and priority of interests under the Land Registration Act 2002
- •15.3.1. Registrable interests
- •15.3.2. All other interests
- •15.3.2.1. Enforceability
- •15.3.2.2. Priority
- •15.4. Overriding interests
- •15.4.1. Justifications for overriding interests
- •15.4.2. Principles to be applied
- •15.4.3. Overriding interests under the 2002 Act
- •15.4.4. Easements and profits
- •15.4.5. Interests of persons in actual occupation: the 1925 Act
- •15.4.5.1. What rights are covered?
- •5.4.5.2. Actual occupation
- •Physical presence
- •Personal occupation
- •Non-residential premises
- •15.4.6. Interests of persons in actual occupation: the 2002 Act
- •15.4.6.1. Causal link between interest and occupation
- •15.4.6.2. Meaning of ‘actual occupation’
- •15.4.6.3. The ‘notice’ element
- •15.4.6.4. Can minors be in actual occupation?
- •15.4.6.5. Occupation of part
- •15.4.7. Complexity
- •Notes and Questions 15.3
- •15.5. Indemnity
- •15.5.1. Function of indemnity
- •15.5.2. Shortfall in the provision of indemnity
- •15.5.3. Cost
- •17 Leases and bailment
- •17.1. Introduction
- •17.2. Leases and bailments compared
- •17.2.1. Consensuality
- •17.2.2. Contract
- •17.2.3. Enforcement
- •17.2.4. Duration and purpose
- •17.2.5. Beneficial use
- •17.2.6. Proprietary status
- •17.2.7. Inherent obligations of the possessor
- •17.3. Leases
- •17.3.1. Nature of the lease
- •17.3.1.1. Duration: the four basic categories
- •The legal position
- •Length of fixed-term leases in practice
- •Commonhold as an alternative to the long residential lease
- •Commercial premises
- •Assignment and premature termination of fixed-term lease
- •17.3.1.3. Periodic tenancies
- •Nature
- •Contractual fetters on notice to quit
- •17.3.1.4. Tenancy at will
- •Tenancy at sufferance
- •Notes and Questions 17.1
- •17.3.1.5. Certainty of duration
- •Notes and Questions 17.2
- •Passage 2
- •Passage 3
- •Passage 4
- •Notes and Questions 17.3
- •17.3.1.7. The tolerated trespasser status
- •Notes and Questions 17.4
- •Notes and Questions 17.5
- •17.3.2. Alienability
- •17.3.2.1. Inherent alienability
- •Alienability of tenant’s interest
- •Subleases and other derivative interests granted by the tenant
- •Effect of termination of lease on derivative interests
- •Alienability of landlord’s interest
- •Concurrent leases and other derivative interests granted by the landlord
- •17.3.2.2. Restrictions on alienability
- •17.3.2.3. Statutory control of contractual restrictions
- •Notes and Questions 17.6
- •17.3.3. Effect of alienation on enforceability
- •17.3.3.1. Introduction: the basic principle
- •Automatic transmission of benefit and burden of proprietary terms: the privity of estate principle
- •Post-assignment liability: the privity of contract principle
- •17.3.3.3. Derivative interest holders
- •17.4. Bailment
- •17.4.1. Essential features of bailment
- •17.4.2. Categories of bailment
- •17.4.3. Characteristics of bailment
- •17.4.4. Liabilities of the bailee
- •Notes and Questions 17.7
- •17.4.5. Is bailment proprietary?
- •17.4.5.1. Possession and exclusivity
- •17.4.5.2. Alienability
- •17.4.5.3. Enforceability against third parties
- •17.4.5.4. Other proprietary indicia
- •18 Security interests
- •18.1. The nature and function of security
- •18.1.1. Nature of security
- •18.1.1.1. Terminology problems
- •18.1.1.2. Legal and equitable rights to redeem
- •18.1.1.3. Creation, attachment and perfection of security
- •18.1.2. Function
- •18.1.2.1. Right of first recourse
- •18.1.2.2. Attachment to the asset
- •18.1.2.4. The hostage function
- •18.1.2.5. Signalling, monitoring and control
- •18.1.3. Efficiency
- •18.1.4. Use of security
- •18.2. Forms of security
- •18.2.1. Property transfer securities: the mortgage
- •18.2.2. Possessory securities: pledge or pawn
- •18.2.3. Hypothecations: the charge
- •18.2.4. Liens
- •18.2.5. Property retention securities
- •18.2.6. Charge by way of legal mortgage
- •Notes and Questions 18.1
- •18.3. Control over the terms of the relationship
- •18.3.1. Equitable supervisory jurisdiction
- •18.3.2. The Kreglinger principles
- •18.3.3. Statutory intervention
- •Notes and Questions 18.2
- •18.4. Enforcement of security
- •18.4.1. Remedies
- •18.4.2. Possession
- •18.4.3. Sale
- •18.4.3.1. When the power arises
- •18.4.3.2. When the power becomes exercisable
- •18.4.4. Duties on enforcement
- •General principles
- •The handling of arrears: initial action taken by lenders
- •Alleviating arrears problems
- •The levying of charges on accounts in arrear
- •Methods of obtaining possession
- •Proceeds of sale
- •Indemnity insurance
- •Loss recovery procedures
- •Notes and Questions 18.3
- •16 Co-ownership
- •16.1. Introduction
- •16.2.1. Basic concepts
- •OWNERSHIP IN COMMON
- •JOINT OWNERSHIP
- •CONCURRENT INTERESTS IN FINANCIAL ASSETS
- •CONCURRENT INTERESTS IN LAND
- •Notes and Questions 16.1
- •Unity of possession
- •Unity of interest
- •Unity of title
- •Unity of time
- •16.2.2. A comparison of joint tenancies and tenancies in common
- •16.2.2.1. Four unities versus one
- •Notes and Questions 16.2
- •16.2.2.2. The right of survivorship (and how to avoid it)
- •Severance at common law
- •16.2.2.3. Acting upon one’s share
- •16.2.2.4. Mutual agreement
- •16.2.2.5. Mutual conduct
- •16.2.2.6. Statutory severance
- •Notes and Questions 16.3
- •16.2.3. Use of co-owned property
- •16.2.3.1. Land
- •12 THE RIGHT TO OCCUPY
- •13 EXCLUSION AND RESTRICTION OF RIGHT TO OCCUPY
- •Notes and Questions 16.4
- •16.2.3.2. Chattels
- •Notes and Questions 16.5
- •16.2.4. Sale and other dispositions of co-owned property
- •16.2.4.1. Land
- •Notes and Questions 16.6
- •16.2.4.2. Chattels
- •16.3. Other forms of co-ownership
- •16.3.1. Commonhold
- •16.3.2. Unincorporated associations
- •Notes and Questions 16.7
- •16.3.3. Extending the limits of co-ownership: public trusts
- •Bibliography
- •Index

48Property Law
Costs of collective action
The difficulties and costs of obtaining all this information will be particularly acute for the residents, private individuals with no pre-existing mechanisms for acting in concert. They must first find some way of organising themselves so that they can seek out this information as a group, avoiding wasteful duplication of cost and effort. They must also set up some sort of organisational structure so that they can raise money to pay agents such as engineers, lawyers and administrators etc. (or find and channel such expertise from among themselves) and make decisions and negotiate as a group rather than as a disparate collection of individuals.
Free-riders and holdouts
Even if the residents do succeed in organising themselves, they will risk wasteful or obstructive action from free-riders and holdouts. Take the problem of free-riders first. Assume the most efficient solution to the problem would be for Canary Wharf Ltd to modify the design of the tower at a cost of £3.5 m, and that the residents are willing to pay them £4 m to do so because otherwise the value of their property will fall by a total of £5 m. A free-rider is a resident who refuses to pay her share of the £4 m because she knows that, if the modification goes ahead, she will get the benefit (uninterrupted television signals) whether she has paid her share or not, and she predicts that the modification will go ahead even if she refuses to pay because the other residents will find some other way of raising the shortfall to avoid frustration of the whole scheme. Free-riding operates in other ways too. All residents who do not participate in the information-gathering/organisational activities are free-riding on the efforts of the activists who do, and the resentment caused by this kind of freeriding is likely to discourage collective action in the first place.
The holdout problem is slightly different. The holdout is the resident who knows that a particular action cannot go ahead without his consent, and therefore refuses to give his consent unless he is paid extra for it. Suppose the most efficient solution would be for Canary Wharf Ltd to install super-aerials in each residence, but that this cannot be done unless they are given access to every residence to lay cables. The holdout will be the resident who refuses access unless paid a large fee, because he knows Canary Wharf Ltd (or the other residents) will have to pay the fee to prevent frustration of the whole scheme.
2.3.2.3. Efficiency
In general terms, when economists talk about efficiency in relation to resources they mean an allocation of resources in which value is maximised. However, it is necessary to look further at what counts as value-maximisation.
Value
In economics, ‘value’ is an ambiguous term, as we see later when we look at the distinction between ‘use value’ and ‘exchange value’. For present purposes,

What we mean by ‘property’ 49
however, ‘value’ can be taken to mean how much someone is prepared to pay for something, or, if they have it already, how much they would demand to part with it (not necessarily the same thing). In assessing value for these purposes, economists do not look at the amount that someone can afford to pay for something. What matters is how much they would pay if they had the money. Also, it is necessary to bear in mind that value, when used in this sense, can be dramatically different from utility, or happiness in the utilitarian sense. Posner illustrates the difference with the following example:
Suppose that pituitary extract is in very scarce supply relative to the demand and is therefore very expensive. A poor family has a child who will be a dwarf if he does not get some of the extract, but the family cannot afford the price and could not even if they could borrow against the child’s future earnings as a person of normal height; for the present value of those earnings net of consumption is less than the price of the extract. A rich family has a child who will grow to normal height, but the extract will add a few inches more, and his parents decide to buy it for him. In the sense of value used in this book, the pituitary extract is more valuable to the rich than to the poor family, because value is measured by willingness to pay; but the extract would confer greater happiness in the hands of the poor family than in the hands of the rich one.
As this example shows, the term efficiency, when used . . . to denote that allocation of resources in which value is maximized, has limitations as an ethical criterion of social decision-making – although perhaps not serious ones, as such examples are very rare. (Posner, Economic Analysis of Law, pp. 11–12)
Pareto efficiency
Strictly speaking, value is maximised when the allocation of resources cannot be bettered, in the sense that it would be impossible to transfer or reallocate the resources in such a way as to make anyone better off without also making at least one other individual worse off. This strict notion of efficiency is called Pareto efficiency (after the nineteenth-century Italian economist and social scientist Vilfredo Pareto), sometimes Pareto superiority or optimality. Pareto efficiency is not a very useful concept, in particular when assessing whether a transaction is efficient, because while voluntary transactions can be expected to make all the parties to the transaction better off (if not, they would not have entered into it) they nearly always make someone somewhere worse off to some degree (if only by altering the market price of the resource).
Kaldor-Hicks efficiency
For this reason, economists more usually use a modified concept of efficiency, termed Kaldor-Hicks efficiency. A transaction is efficient in the Kaldor-Hicks sense if it makes someone better off, provided that it does not make someone else worse off by a greater amount. Any transaction that produces a net increase in