United Mine Workers v. Pennington
E666874
United Mine Workers v. Pennington is a 1965 U.S. Supreme Court antitrust case that examined whether a union’s collective bargaining activities with employers could be subject to Sherman Act liability.
All labels observed (2)
| Label | Occurrences |
|---|---|
| United Mine Workers of America v. Pennington | 1 |
| United Mine Workers v. Pennington canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7476429 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: United Mine Workers v. Pennington Context triple: [California Motor Transport Co. v. Trucking Unlimited, relatedCase, United Mine Workers v. Pennington]
-
A.
United Public Workers v. Mitchell
United Public Workers v. Mitchell is a 1947 U.S. Supreme Court case that upheld the constitutionality of the Hatch Act’s restrictions on federal employees’ political activities.
-
B.
Carter v. Carter Coal Co.
Carter v. Carter Coal Co. was a 1936 U.S. Supreme Court case that struck down federal regulation of coal production as an unconstitutional overreach of Congress’s Commerce Clause powers.
-
C.
NLRB v. Jones & Laughlin Steel Corp.
NLRB v. Jones & Laughlin Steel Corp. is a landmark 1937 U.S. Supreme Court decision that upheld federal power to regulate labor relations, marking a major expansion of Congress’s authority over interstate commerce.
-
D.
United States v. Darby
United States v. Darby is a 1941 U.S. Supreme Court case that upheld federal labor regulations under the Commerce Clause and marked a broad expansion of federal power over economic activity.
-
E.
Jenson v. Eveleth Taconite Co.
Jenson v. Eveleth Taconite Co. was a landmark U.S. class-action sexual harassment lawsuit brought by female mine workers in Minnesota’s Iron Range, recognized as one of the first major cases to address workplace sexual harassment in a blue-collar industry.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: United Mine Workers v. Pennington Target entity description: United Mine Workers v. Pennington is a 1965 U.S. Supreme Court antitrust case that examined whether a union’s collective bargaining activities with employers could be subject to Sherman Act liability.
-
A.
United Public Workers v. Mitchell
United Public Workers v. Mitchell is a 1947 U.S. Supreme Court case that upheld the constitutionality of the Hatch Act’s restrictions on federal employees’ political activities.
-
B.
Carter v. Carter Coal Co.
Carter v. Carter Coal Co. was a 1936 U.S. Supreme Court case that struck down federal regulation of coal production as an unconstitutional overreach of Congress’s Commerce Clause powers.
-
C.
NLRB v. Jones & Laughlin Steel Corp.
NLRB v. Jones & Laughlin Steel Corp. is a landmark 1937 U.S. Supreme Court decision that upheld federal power to regulate labor relations, marking a major expansion of Congress’s authority over interstate commerce.
-
D.
United States v. Darby
United States v. Darby is a 1941 U.S. Supreme Court case that upheld federal labor regulations under the Commerce Clause and marked a broad expansion of federal power over economic activity.
-
E.
Jenson v. Eveleth Taconite Co.
Jenson v. Eveleth Taconite Co. was a landmark U.S. class-action sexual harassment lawsuit brought by female mine workers in Minnesota’s Iron Range, recognized as one of the first major cases to address workplace sexual harassment in a blue-collar industry.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
U.S. Supreme Court case
ⓘ
antitrust case ⓘ labor law case ⓘ |
| affects | scope of nonstatutory labor exemption to antitrust laws ⓘ |
| areaOfLaw |
U.S. federal antitrust law
ⓘ
U.S. federal labor law ⓘ |
| citation | 381 U.S. 657 ⓘ |
| concernedActivity |
alleged conspiracy to eliminate competition among coal operators
ⓘ
collective bargaining over wage rates ⓘ |
| concernedIndustry | coal industry ⓘ |
| concurringOpinionBy | Justice Douglas NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| court | Supreme Court of the United States ⓘ |
| decisionDate | 1965-04-05 ⓘ |
| decisionType | majority decision with dissents ⓘ |
| dissentingOpinionBy |
Justice Fortas
NERFINISHED
ⓘ
Justice Goldberg NERFINISHED ⓘ Justice Harlan NERFINISHED ⓘ Justice Stewart NERFINISHED ⓘ |
| docketNumber | No. 83 ⓘ |
| fullName | United Mine Workers of America v. Pennington NERFINISHED ⓘ |
| holding |
A union and employers may be subject to Sherman Act liability when they combine to impose a wage scale intended to drive competitors out of business.
ⓘ
Union conduct is not automatically exempt from antitrust laws when it involves combinations with nonlabor groups to achieve anticompetitive objectives. ⓘ |
| involvesParty |
Pennington
NERFINISHED
ⓘ
United Mine Workers of America NERFINISHED ⓘ |
| issue | Whether a union’s collective bargaining activities with employers can be subject to Sherman Act liability. ⓘ |
| jurisdiction | federal question jurisdiction ⓘ |
| legalSubject |
Clayton Act
NERFINISHED
ⓘ
Sherman Act NERFINISHED ⓘ antitrust law ⓘ collective bargaining ⓘ labor law ⓘ nonstatutory labor exemption ⓘ |
| majorityOpinionBy | Justice White NERFINISHED ⓘ |
| pageInUnitedStatesReports | 657 ⓘ |
| proceduralPosture | appeal from the United States Court of Appeals ⓘ |
| relatedCase |
Allen Bradley Co. v. Local Union No. 3
NERFINISHED
ⓘ
Apex Hosiery Co. v. Leader NERFINISHED ⓘ Local 189, Amalgamated Meat Cutters v. Jewel Tea Co. NERFINISHED ⓘ |
| relatedDoctrine | labor antitrust exemption ⓘ |
| statuteInterpreted |
Clayton Act
NERFINISHED
ⓘ
Sherman Antitrust Act NERFINISHED ⓘ |
| subsequentCitationFrequency | frequently cited ⓘ |
| volumeOfUnitedStatesReports | 381 ⓘ |
| yearDecided | 1965 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: United Mine Workers v. Pennington Description of subject: United Mine Workers v. Pennington is a 1965 U.S. Supreme Court antitrust case that examined whether a union’s collective bargaining activities with employers could be subject to Sherman Act liability.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
California Motor Transport Co. v. Trucking Unlimited
→
relatedCase
→
United Mine Workers v. Pennington
ⓘ
this entity surface form:
United Mine Workers of America v. Pennington