Whether federal or state law supplies the standard for determining the sufficiency of evidence for a jury question in a diversity case.
Holding
Federal law supplies the standard.
Reasoning
The question whether evidence is sufficient to warrant jury submission concerns the federal court's allocation of responsibility between judge and jury. That allocation is a central feature of the federal judicial system, not merely a matter of state substantive law.
Although applying a federal standard may affect outcomes in state-law cases, the court concluded that preserving the essential character and integrity of federal fact-finding processes outweighs the interest in complete state-federal uniformity. The court therefore reaffirmed prior Fifth Circuit precedent applying a federal sufficiency standard in diversity cases.