Cite as: 521 U. S. 121 (1997)
Opinion of the Court
balanced, the proponent loses, see id., at 281. On the initial claim for nominal compensation under the Act, then, the employee has the burden of showing by a preponderance of the evidence that he has been injured and that the odds are significant that his wage-earning capacity will fall below his preinjury wages at some point in the future. But when an employer seeks modification of previously awarded compensation, the employer is the proponent of the order with the burden of establishing a change in conditions justifying modification. In a case like this, where the prior award was based on a finding of economic harm resulting from an actual decline in wage-earning capacity at the time the award was entered, the employer satisfies this burden by showing that as a result of a change in capacity the employee's wages have risen to a level at or above his preinjury earnings. Once the employer makes this showing, § 8(h) gives rise to the presumption that the employee's wage-earning capacity is equal to his current, higher wage and, in the face of this presumption, the burden shifts back to the claimant to show that the likelihood of a future decline in capacity is sufficient for an award of nominal compensation. We emphasize that the probability of a future decline is a matter of proof; it is not to be assumed pro forma as an administrative convenience in the run of cases.
In this case, the first award of compensation was based on the parties' stipulation that Rambo suffered 221/2% permanent partial disability as a result of his injury, whereby Rambo established that the injury impaired his ability to undertake at least some types of previously available gainful labor and thus prevented him from earning as much as he had before his accident. Metropolitan sought termination of the award based solely on evidence, which the ALJ found persuasive, that Rambo is now able to earn market wages as a crane operator significantly greater than his preinjury earnings. There is therefore substantial evidence in the record supporting the ALJ's decision to terminate actual (as
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