Table of Contents |
| General Report: Causal Uncertainty and Proportional Liability: Analytical and Comparative Report / Bernhard A. Koch | 1 |
I. | Introduction | 1 |
1. | Meaning and Definition of Proportional Liability in the Project | 1 |
2. | Causal Proportional Liability Contrasted with Proportional Liability Among Multiple Tortfeasors Based on Contributory (Comparative) Negligence | 3 |
3. | The Aim of This Project | 4 |
4. | Structure | 8 |
II. | Categories of Proportional Liability | 10 |
1. | Why Categorize? | 10 |
2. | Category A - Uncertain Causes of Past Harm | 12 |
A. | Sub-category A1 - àlternative liability' - indeterminate tortfeasors | 12 |
B. | Sub-category A2 - ̀market-share liability' - causally unrelated tortfeasors and victims | 13 |
C. | Sub-category A3 - ̀pollution or drug cases' - indeterminate victims | 13 |
D. | Sub-category A4 - ̀The hard case' | 14 |
E. | Sub-category A5 - ̀lost chances' | 14 |
3. | Category B - Indeterminate Parts of Harm | 15 |
A. | Sub-category B1 - all parts of P's harm were caused by liable Ds | 15 |
B. | Sub-category B2 - some parts of P's harm were caused by other factors | 16 |
4. | Category C - Unrealized Risks with Potential for Future Harms | 16 |
5. | Category D - ̀Combination Cases' | 17 |
III. | Policy Considerations | 17 |
IV. | Burden and Standard of Proof | 20 |
V. | Category A - Uncertain Causes of Past Harm | 22 |
1. | Sub-category A1 - Àlternative Liability' - Indeterminate Tortfeasor | 23 |
A. | Analysis | 23 |
B. | A1 cases in comparison | 25 |
2. | Sub-category A2 - ̀Market-share Liability' - Causally Unrelated Tortfeasors and Victims | 26 |
A. | Analysis | 26 |
B. | A2 cases in comparison | 30 |
3. | Sub-category A3 - ̀Pollution or Drug Cases' - Indeterminate Victims | 31 |
A. | Analysis | 31 |
B. | A3 cases in comparison | 34 |
4. | Sub-category A4 - ̀The Hard Case' | 35 |
A. | Analysis | 35 |
B. | A4 cases in comparison | 38 |
5. | Sub-category A5 - The ̀Lost Chance' Doctrine | 39 |
A. | Analysis | 39 |
B. | A5 cases in comparison | 43 |
VI. | Category B - Indeterminate Parts of Harm | 44 |
1. | Sub-category B1 - Indeterminate Parts of Harm Caused by Tortious Actors | 45 |
A. | Analysis | 45 |
B. | B1 cases in comparison | 47 |
2. | Sub-category B2 - Indeterminate Parts of Harm Caused by Non-tortious Factors | 48 |
A. | Analysis | 48 |
B. | B2 cases in comparison | 49 |
VII. | Category C - Risks of Future Harm | 50 |
1. | Sub-category C1 - Future Harm Uncertain Entirely | 51 |
A. | Analysis | 51 |
B. | C1 cases in comparison | 52 |
2. | Sub-Category C2 - Extent of Future Harm Uncertain | 54 |
A. | Analysis | 54 |
B. | C2 cases in comparison | 55 |
VIII. | Category D - ̀Combination Cases' | 56 |
1. | On the meaning of combination cases | 56 |
2. | How to cope with ̀combination cases' | 57 |
IX. | Summary and Conclusions | 58 |
1. | How to Approach CPL Issues? | 59 |
2. | The Relevant Factual Effects of CPL | 59 |
3. | Normative Considerations | 61 |
4. | On the Cautious Monitored Development of CPL | 62 |
5. | On the Comparative Landscape | 64 |
6. | On Future Developments | 66 |
| Categories of Proportional Liability | 69 |
Category A | Uncertain Causes of Past Harm | 69 |
Sub-category A1 | Àlternative Liability' - Indeterminate Tortfeasor | 69 |
Sub-category A2 | M̀arket-share Liability' - Causally Unrelated Tortfeasors and Victims | 69 |
Sub-category A3 | P̀ollution or Drug Cases' - Indeterminate Victims | 70 |
Sub-category A4 | T̀he Hard Case' | 70 |
Sub-category A5 | The ̀Lost Chance' Doctrine | 71 |
Category B | Indeterminate Parts of Harm | 71 |
Sub-category B1 | Indeterminate Parts of Harm Caused by Tortious Actors | 71 |
Sub-category B2 | Indeterminate Parts of Harm Caused by Non-tortious Factors | 72 |
Category C | Risks of Future Harm | 72 |
Sub-category C1 | Future Harm Uncertain Entirely | 73 |
Sub-category C2 | Extent of Future Harm Uncertain | 73 |
Category D | C̀ombination Cases' | 73 |
| Country Reports | |
| Causal Uncertainty and Proportional Liability in Austria / Bernhard A. Koch | 77 |
I. | Standard of Proof | 77 |
II. | The Discussion of Proportional Liability in Austria | 79 |
A. | The Starting Point - Multiple Tortfeasors under the ABGB | 79 |
B. | Alternative Causes | 80 |
1. | Alternative External Causes | 80 |
2. | Alternative External Causes Competing with Risks within the Victim's own Sphere | 83 |
C. | Other Instances of Causal Uncertainty | 87 |
1. | Alternative Victims | 87 |
2. | Minimal Causation | 88 |
3. | Loss of a Chance | 88 |
4. | Market-Share Liability | 90 |
D. | The Two Drafts of a Tort Law Reform - One Step Forward and Two Steps Back | 90 |
III. | The Case Hypotheticals from an Austrian Perspective | 92 |
A. | Category A - Uncertain Causes of Past Harm | 92 |
1. | Sub-category A1 - Àlternative Liability' - Indeterminate Tortfeasor | 92 |
2. | Sub-category A2 - ̀Market-share Liability' - Causally Unrelated Tortfeasors and Victims | 92 |
3. | Sub-category A3 - ̀Pollution of Drug Cases' - Indeterminate Victims | 93 |
4. | Sub-category A4 - ̀The Hard Case' | 93 |
5. | Sub-category A5 - The ̀Lost Chance' Doctrine | 93 |
B. | Category B - Indeterminate Parts of Harm | 94 |
1. | Sub-category B1 - Indeterminate Parts of Harm Caused by Tortious Actors | 94 |
2. | Sub-category B2 - Indeterminate Parts of Harm Caused by Non-tortious Factors | 95 |
C. | Category C - Risks of Future Harm | 95 |
D. | Category D - ̀Combination Cases' | 96 |
IV. | Summary | 96 |
| Causal Uncertainty and Proportional Liability in the Czech Republic / Jiri Hradek | 99 |
I. | Definition of Proportional Liability | 99 |
A. | Introduction | 99 |
B. | Legal Provisions of Substantive Law | 99 |
1. | Provisions on Multiple Tortfeasors | 99 |
2. | Causation | 101 |
3. | Provisions on Proportional Liability | 104 |
II. | Policy Consideration | 105 |
III. | Burden of Proof | 106 |
A. | Legal Provisions | 106 |
B. | Possible Changes | 108 |
IV. | Category A - Uncertain Causes of Past Harm | 110 |
1. | Sub-category A1 - Àlternative Liability' - Indeterminate Tortfeasor | 110 |
2. | Sub-category A2 - ̀Market-share Liability' - Causally Unrelated Tortfeasors and Victims | 111 |
3. | Sub-category A3 - ̀Pollution or Drug Cases' - Indeterminate Victims | 111 |
4. | Sub-category A4 - ̀The Hard Case' | 113 |
5. | Sub-category A5 - The ̀Lost Chance' Doctrine | 113 |
V. | Category B - Indeterminate Parts of Harm | 114 |
1. | Sub-category B1 - Indeterminate Parts of Harm Caused by Tortious Actors | 114 |
2. | Sub-category B2 - Indeterminate Parts of Harm Caused by Non-tortious Factors | 115 |
VI. | Category C - Risks of Future Harm | 116 |
1. | Sub-category C1 - Future Harm Uncertain Entirely | 116 |
2. | Sub-category C2 - Extent of Future Harm Uncertain | 116 |
| Causal Uncertainty and Proportional Liability in Denmark / Vibe Ulfbeck | 117 |
| Causal Uncertainty and Proportional Liability in England and Wales / Ken Oliphant | 121 |
I. | Introduction | 121 |
| Meaning of ̀Proportional Liability' | 121 |
II. | Proportional Liability: The Fairchild Exception | 122 |
A. | Starting Points | 122 |
B. | Orthodox Approach to Alternative Causes | 123 |
C. | Fairchild and beyond | 124 |
III. | The Categories of Proportional Liability | 128 |
A. | Alternative Liability (Unidentified Tortfeasor) | 128 |
B. | M̀arket-Share Liability' (A Closed Set of Tortfeasors and Victims) | 128 |
C. | Pollution and Drug Cases (Unidentified Victim) | 129 |
D. | Increased Risk | 130 |
E. | The ̀Lost Chance' Doctrine | 131 |
F. | Certain Causation - Uncertain Extent (Only Tortious Causes) | 134 |
G. | Certain Causation - Uncertain Extent (Tortious and Non-Tortious Causes) | 135 |
H. | Causal Uncertainty as to Future Harm | 136 |
IV. | Concluding Remarks | 139 |
| Causal Uncertainty and Proportional Liability in France / Olivier Moreteau | 141 |
I. | Introduction | 141 |
II. | Burden and Standard of Proof | 141 |
III. | Category A - Uncertain Causes of Past Harm | 143 |
1. | Sub-Category A4 - A5: The ̀Hard Case' and Lost Chances | 143 |
2. | Sub-category A1 - Àlternative Liability' - Indeterminate Tortfeasor | 144 |
3. | Sub-category A3 - ̀Pollution or Drug Cases' - Indeterminate Victims | 147 |
4. | Sub-category A2 - ̀Market-share Liability' - Causally Unrelated Tortfeasors and Victims | 147 |
IV. | Category B - Indeterminate Parts of Harm | 148 |
V. | Category C - Risks of Future Harm | 150 |
1. | Sub-category C1 - Future Harm Uncertain Entirely | 151 |
2. | Sub-category C2 - Extent of Future Harm Uncertain | 151 |
| Causal Uncertainty and Proportional Liability in Germany / Ulrich Magnus | 153 |
I. | Definition of Proportional Liability | 153 |
II. | Categories of Proportional Liability | 155 |
III. | Policy Considerations | 155 |
1. | Deterrence | 156 |
2. | Justice/Fairness | 157 |
3. | Reduction of Administrative Costs | 158 |
4. | Further Policy Considerations | 158 |
IV. | Burden of Proof | 158 |
1. | In General | 158 |
2. | Standard of Proof | 159 |
V. | Category A - Uncertain Causes of Past Harm | 160 |
1. | Sub-category A1 - Àlternative Liability' - Indeterminate - Tortfeasor | 160 |
2. | Sub-category A2 - ̀Market-share Liability' - Causally Unrelated Tortfeasors and Victims | 161 |
3. | Sub-category A3 - ̀Pollution or Drug Cases' - Indeterminate Victims | 162 |
4. | Sub-category A4 - ̀The Hard Case' | 162 |
5. | Sub-category A5 - The ̀Lost Chance' Doctrine | 163 |
VI. | Category B - Indeterminate Parts of Harm | 163 |
1. | Sub-category B1 - Indeterminate Parts of Harm Caused by Tortious Actors | 163 |
2. | Sub-category B2 - Indeterminate Parts of Harm Caused by Non-tortious Factors | 164 |
VII. | Category C - Risks of Future Harm | 164 |
1. | Sub-category C1 - Future Harm Uncertain Entirely | 164 |
2. | Sub-category C2 - Extent of Future Harm Uncertain | 164 |
VIII. | Category D - ̀Combination Cases' | 165 |
IX. | Conclusions | 165 |
1. | In General | 165 |
2. | The Relevant Factual Effects of Proportional Liability | 165 |
(a). | Gainers and Losers | 165 |
(b). | Effect on Incentives | 166 |
(c). | Number of Suits | 167 |
(d). | Costs of Suits | 167 |
(e). | Informational Difficulties | 168 |
(f). | Distribution of Probabilities | 168 |
(g). | Degree of Fault | 168 |
(h). | Degree of Uncertainty | 168 |
3. | Policy Considerations | 168 |
| Causal Uncertainty and Proportional Liability in Greece / Eugenia Dacoronia | 171 |
I. | Introduction | 171 |
| General Definition | 171 |
II. | Policy Considerations | 173 |
III. | Burden and Standard of Proof | 173 |
IV. | Category A - Uncertain Causes of Past Harm | 174 |
1. | Sub-category A1 - Àlternative Liability' - Indeterminate Tortfeasor | 174 |
2. | Sub-category A2 - ̀Market-share Liability' - Causally Unrelated Tortfeasors and Victims | 175 |
3. | Sub-category A3 - ̀Pollution or Drug Cases' - Indeterminate Victims | 176 |
4. | Sub-category A4 - ̀The Hard Case' | 177 |
5. | Sub-category A5 - The ̀Lost Chance' Doctrine | 178 |
V. | Category B - Indeterminate Parts of Harm | 179 |
1. | Sub-category B1 - Indeterminate Parts of Harm Caused by Tortious Actors | 179 |
2. | Sub-category B2 - Indeterminate Parts of Harm Caused by Non-tortious Factors | 179 |
VI. | Category C - Risks of Future Harm | 180 |
1. | Sub-category C1 - Future Harm Uncertain Entirely | 180 |
2. | Sub-category C2 - Extent of Future Harm Uncertain | 181 |
| Causal Uncertainty and Proportional Liability in Israel / Israel Gilead | 183 |
I. | Introduction | 183 |
II. | The Malul Case | 183 |
III. | Burden and Standard of Proof | 185 |
IV. | Categorisation | 186 |
V. | Policy Considerations | 187 |
VI. | Category A - Uncertain Causes of Past Harm | 188 |
1. | Sub-category A1 - Àlternative Liability' - Indeterminate Tortfeasor | 188 |
2. | Sub-category A2 - ̀Market-share Liability' - Causally Unrelated Tortfeasors and Victims | 189 |
3. | Sub-category A3 - ̀Pollution or Drug Cases' - Indeterminate Victims | 190 |
4. | Sub-Categories A4 and A5 - ̀Hard Cases' and ̀Lost Chances' | 191 |
| Sub-category A5 - The ̀Lost Chance' Doctrine | 192 |
| Sub-category A4 - ̀The Hard Case' | 193 |
VII. | Category B - Indeterminate Parts of Harm | 194 |
1. | Sub-category B1 - Indeterminate Parts of Harm Caused by Tortious Actors | 194 |
2. | Sub-category B2 - Indeterminate Parts of Harm Caused by Non-tortious Factors | 195 |
VIII. | Category C - Risks of Future Harm | 196 |
IX. | Concluding Remarks | 197 |
| Proportional Liability in Uncertain Settings: Is it Precautionary? Italian Insights and Comparative Policy Considerations / Luca Nocco | 199 |
I. | In Search of a Definition for Proportional Liability | 199 |
A. | Introduction | 199 |
B. | The Standard of Proof | 201 |
C. | Reasons to Introduce a Rule of Proportional Liability and Policy Related Implications | 203 |
II. | In Search of Instances for Proportional Liability | 206 |
A. | The First Category of Proportional Liability (and Tools Aiming to Achieve Similar Objectives): Uncertainty Regarding the Link Between Defendant's Conduct and Harm | 206 |
1. | Sub-category A1 - Àlternative Liability' - Indeterminate Tortfeasor | 206 |
2. | Sub-category A2 - ̀Market-share Liability' - Causally Unrelated Tortfeasors and Victims | 211 |
3. | Sub-category A3 - ̀Pollution or Drug Cases' - Indeterminate Victims | 212 |
4. | Sub-category A4 - ̀The Hard Case' | 212 |
5. | Sub-category A5 - The ̀Lost Chance' Doctrine | 213 |
B. | Some Insights on Proportional Liability and Uncertainty | 215 |
C. | The Second Category of Proportional Liability: Indeterminate Parts of Harm | 219 |
D. | The Third Category of Proportional Liability: Uncertain Materialisation of Risk | 220 |
III. | In Search of a Reasonable Proportional Liability Rule for Uncertain Settings | 223 |
| Going Dutch: How to Address Cases of Causal Uncertainty / Anne L.M. Keirse | 227 |
I. | Preface | 227 |
II. | An All-or-Nothing External Liability Paired with an Internal Proportional Apportionment | 228 |
III. | The Reversal of the Burden of Proof | 232 |
IV. | The Theory of the Loss of a Chance: A Step Closer towards Accepting Proportional Liability | 232 |
V. | Proportional Liability: No Longer an Ìnternal Matter' | 235 |
VI. | Proportional Liability Confirmed | 240 |
VII. | Follow-up case law | 242 |
VIII. | Concluding Remarks | 245 |
| Annex: Short answers to the cases from a Dutch perspective | 246 |
| Causal Uncertainty and Proportional Liability in Norway / Bjarte Askeland | 249 |
| Existing Solutions to the Various Categories | 251 |
| Causal Uncertainty and Proportional Liability in Poland / Ewa Baginska | 253 |
I. | Introduction | 253 |
II. | General Remarks on Causation and Burden of Proof in Polish Law | 254 |
A. | Causation | 254 |
B. | Burden of Proof | 256 |
III. | The Way to the Coronation of the Rule of Joint and Several Liability in Polish Law | 259 |
A. | The Rise and Fall of Proportional Liability in Polish Law | 259 |
B. | The Main Characteristics of Joint and Several Liability | 261 |
IV. | Possible Application of Proportional Liability - Specific Categories | 262 |
A. | Category A - Uncertain Causes of Past Harm | 262 |
1. | Sub-category A1 - Àlternative Liability' - Indeterminate Tortfeasor | 262 |
2. | Sub-category A2 - ̀Market-share Liability' - Causally Unrelated Tortfeasors and Victims | 264 |
3. | Sub-category A3 - ̀Pollution or Drug Cases' - Indeterminate Victims | 265 |
4. | Sub-category A4 - ̀The Hard Case' | 266 |
5. | Sub-category A5 - The ̀Lost Chance' Doctrine | 268 |
B. | Category B - Indeterminate Parts of Harm | 270 |
1. | Sub-category B1 - Indeterminate Parts of Harm Caused by Tortious Actors | 270 |
2. | Sub-category B2 - Indeterminate Parts of Harm Caused by Non-tortious Factors | 273 |
C. | Category C - Risks of Future Harm | 274 |
D. | Category D - ̀Combination Cases' | 276 |
V. | Final Observations | 278 |
| Causal Uncertainty and Proportional Liability in South Africa / Johann Neethling | 283 |
I. | Category A - Uncertain Causes of Past Harm | 283 |
A. | Sub-category A1 - Àlternative Liability' - Indeterminate Tortfeasor | 283 |
B. | Sub-category A2 - ̀Market-share Liability' - Causally Unrelated Tortfeasors and Victims | 285 |
C. | Sub-category A3 - ̀Pollution or Drug Cases' - Indeterminate Victims | 286 |
D. | Sub-category A4 - ̀The Hard Case' | 287 |
E. | Sub-category A5 - The ̀Lost Chance' Doctrine | 288 |
II. | Category B - Indeterminate Parts of Harm | 289 |
A. | Sub-category B1 - Indeterminate Parts of Harm Caused by Tortious Actors | 289 |
B. | Sub-category B2 - Indeterminate Parts of Harm Caused by Non-tortious Factors | 290 |
III. | Category C - Risks of Future Harm | 292 |
A. | Sub-category C1 - Future Harm Uncertain Entirely | 292 |
B. | Sub-category C2 Extent of Euture Harm Uncertain | 292 |
| Causal Uncertainty and Proportional Liability in Spain / Josep Sole | 295 |
I. | Introduction | 295 |
A. | The proof of causation under Spanish Law | 295 |
B. | Procedural means to overcome uncertainty | 296 |
C. | The notion of ̀proportional liability' in current Spanish law | 297 |
D. | Policy considerations in the Spanish debate | 299 |
II. | Categories of proportional liability | 300 |
A. | Uncertainty about past harm | 300 |
1. | Indeterminate tortfeasors (àlternative liability') | 300 |
2. | Causally unrelated tortfeasors and victims (̀market-share liability') | 304 |
3. | Indeterminate Victim (̀Pollution or Drug Cases') | 306 |
4. | The ̀Hard Case' category | 306 |
5. | The ̀Loss of Chance' Doctrine | 309 |
B. | Indeterminate Parts of Harm | 312 |
1. | All the parts of the harm-were caused by a group of tortious defendants | 312 |
2. | Part of the harm caused by contributory negligence of the victim or by a non-tortious factor | 314 |
C. | Unrealised risks of future harm | 315 |
D. | Combination cases | 317 |
III. | Final remarks | 318 |
| Causal Uncertainty and Proportional Liability in Switzerland / Benedict Winiger | 323 |
I. | Definition of Proportional Liability | 323 |
II. | Categories of Proportional Liability | 325 |
III. | Policy Considerations | 326 |
IV. | Burden and Standard of Proof | 328 |
V. | Category A - Uncertain Causes of Past Harm | 330 |
1. | Sub-category A1 - Àlternative Liability' - Indeterminate Tortfeasor | 330 |
2. | Sub-category A2 - ̀Market-share Liability' - Causally Unrelated Tortfeasors and Victims | 331 |
3. | Sub-category A3 - ̀Pollution or Drug Cases' - Indeterminate Victims | 332 |
4. | Sub-category A4 - ̀The Hard Case' | 333 |
5. | Sub-category A5 - The ̀Lost Chance' Doctrine | 333 |
VI. | Category B - Indeterminate Parts of Harm | 336 |
1. | Sub-category B1 - Indeterminate Parts of Harm Caused by Tortious Actors | 336 |
2. | Sub-category B2 - Indeterminate Parts of Harm Caused by Non-tortious Factors | 337 |
VII. | Category C - Risks of Future Harm | 337 |
1. | Sub-category C1 - Future Harm Uncertain Entirely | 337 |
2. | Sub-category C2 - Extent of Future Harm Uncertain | 338 |
VIII. | Category D - ̀Combination Cases' | 339 |
IX. | Conclusions | 340 |
| Causal Uncertainty and Proportional Liability in the US / Michael D. Green | 343 |
I. | Burden and Standard of Proof | 343 |
II. | The Meaning of Proportional Liability | 343 |
III. | Scholarly Treatment of Proportional Liability in the US | 344 |
IV. | Policy Considerations | 351 |
V. | The Categories of Proportional Liability | 353 |
A. | Category A - Uncertain Causes of Past Harm | 353 |
1. | Introduction | 353 |
2. | Sub-category A1 - Àlternative Liability' - Indeterminate Tortfeasor | 356 |
3. | Sub-category A2 - ̀Market-share Liability' - Causally Unrelated Tortfeasors and Victims | 357 |
4. | Sub-category A3 - ̀Pollution or Drug Cases' - Indeterminate Victims | 357 |
5. | Sub-category A4 - ̀The Hard Case' | 360 |
6. | Sub-category A5 - The ̀Lost Chance' Doctrine | 362 |
B. | Category B - Indeterminate Parts of Harm | 365 |
1. | Sub-category B1 - Indeterminate Parts of Harm Caused by Tortious Actors | 365 |
2. | Sub-category B2 - Indeterminate Parts of Harm Caused by Non-tortious Factors | 367 |
C. | Category C - Risks of Future Harm | 368 |
1. | Sub-category C1 - Future Harm Uncertain Entirely | 368 |
2. | Sub-category C2 - Extent of Future Harm Uncertain | 369 |
| List of Contributors | 371 |
| Index | 373 |