This case comes to the original panel on remand from our recent en banc decision for consideration of issues pertaining to damages. Our en banc decision affirmed the district court’s denial of Defendant Guiberson Oil Tools’ motion for judgment notwithstanding the verdict. Guiberson Oil Tools appeals the district court’s calculation of damages. Plaintiff Calvin Rhodes cross-appeals the district court’s calculation of damages, and also cross-appeals the district court’s denial of his motion for directed verdict on the issue of willfulness. We affirm in part, vacate in part, and remand.
I
Rhodes filed suit against his former employer, Guiberson Oil Tools, alleging age discrimination, in violation of the Age Discrimination in Employment Act, 29 U.S.C. §§ 621-34 (“ADEA”). In a bifurcated trial, a jury found (1) that Guiberson Oil Tools terminated Rhodes because of his age, and (2) that Guiberson Oil Tools did not act willfully when it terminated Rhodes. The action was then dismissed as time-barred. Rhodes filed a timely notice of appeal. We reversed and remanded to the district court.
Rhodes v. Guiberson Oil Tools, Div.,
II
In reviewing a district court’s award of damages, we review all issues of law de novo. Absent an error of law, a district court’s award of compensatory damages presents an issue of fact, subject to the clearly erroneous standard of review.
Sockwell v. Phelps,
A
1
Guiberson Oil Tools first argues that the district court erred by failing to deduct $30,372.00 in severance pay from its award of back pay. The purpose of the ADEA is to make the plaintiff whole.
Hansard v. Pepsi-Cola Metro. Bottling Co.,
2
Guiberson Oil Tools next contends that the district court erred in its calculation of damages relating to Rhodes’s pension benefits. The present value of a plaintiffs interest in a pension plan is recoverable as an element of damages under the ADEA.
Huk-kanen v. International Union of Operating Eng’rs, Hoisting & Portable Local No. 101,
Evidence at trial demonstrated that, upon retirement in 1995 at age sixty-five, Rhodes would have received $281,045.00 in pension benefits. In its calculation of damages, the district court allowed $237,202.00 for pension benefits, the present value (as of the date of judgment in 1992) of the $281,045.00 that Rhodes would have received in 1995. Evidence at trial also established that Guiberson Oil Tools paid Rhodes a lump sum pension benefit of $260,846.00 when he was terminated in 1987. In its calculation of damages, the district court allowed Guiberson Oil Tools a credit for this $260,846.00 amount. In so doing, the district court, in effect, subtracted the
1987 value
of the lump sum payment from the
1992 value
of what Rhodes would have received in 1995. In order to accurately calculate the “present value of the plaintiffs interest in the pension plan
as of the date of settlement,” Hukkanen,
3
Guiberson Oil Tools next contends that the district court erred in finding that Rhodes adequately mitigated his damages. The ADEA requires that plaintiffs use reasonable efforts to obtain other employment after termination.
Hansard,
4
Guiberson Oil Tools next contends that the district court erred in calculating Rhodes’s damages for back pay. At the time of his termination in October of 1986, Rhodes was earning $5,062.00 per month. The magistrate judge used this figure to calculate damages for back pay for the period between November 1986 and August 1990. The magistrate judge then made a finding that Rhodes would have received a five percent increase in salary in September 1990 had he not been terminated by Guiberson Oil Tools. Accordingly, the magistrate judge calculated back pay at the rate of $5,315.00 per month for the period between September 1990 and the date of judgment in July 1992. Rhodes’s uncontradicted testimony at trial established that he received at least a five percent increase in salary every year that he was employed by Guiberson Oil Tools. Based on this record, the district court’s finding that Rhodes would have received a five percent increase in salary if he had not been terminated by Guiberson Oil Tools is not clearly erroneous.
B
1
The ADEA provides that liquidated damages are available to plaintiffs in cases in which the ADEA violation is willful. 29 U.S.C. § 626(b). On cross-appeal, Rhodes argues that the district court erred in denying his motion for directed verdict on the issue of willfulness. We will reverse a district court’s denial of a plaintiffs motion for directed verdict only if the facts and inferences point so strongly in the plaintiffs favor that reasonable persons could not arrive at a contrary verdict.
Smith v. Transworld Drilling Co.,
2
Rhodes next asserts that the district court erred in calculating his damages for pension benefits and front pay. Regarding pension benefits, the district court found that Rhodes would have received $281,045.00 in pension benefits in January 1995, had Guiberson Oil *622 Tools not terminated him. Regarding front pay, the district court found that Rhodes would have received $154,820.80 in salary, at $5,315.00 per month, in the period between the date of judgment in July 1992 and Rhodes’s expected retirement in January 1995, had Guiberson Oil not terminated him. The district court then discounted both these sums to present value, as of the date of judgment, using a market discount rate of seven percent.
In our en banc decision in
Culver v. Slater Boat Co., 122
F.2d 114 (5th Cir.1983), ce
rt. denied,
The district court in Rhodes’s ease applied a discount rate of seven percent to both Rhodes’ future pension benefits and Rhodes’s lost future wages. This figure represents the average yield of T-Bills for the seven-and-one-half-year period between January 1, 1986, and the date of judgment in August 1992. The district court’s calculation reasonably identifies a market interest rate for that period, based on the safest available investments, and thus establishes an appropriate ' discount rate for an inflation-free economy. We first consider the propriety of adopting this market interest rate as the discount rate for Rhodes’s future pension benefits. Evidence at trial established that upon retirement in 1995, Rhodes would have received pension benefits totalling $281,-045.00. This figure was a fixed amount, which would not have varied due to economic inflation. Therefore, the calculation of the present value of Rhodes’s future pension benefits was effectively equivalent to the calculation of the present value of lost future wages in an inflation-free economy. Consequently, the district court did not err in adopting a market rate of interest of seven percent as the discount rate for Rhodes’s future pension benefits.
The present value of Rhodes’s lost future wages, on the other hand, was not properly calculable without considering the effect of inflation. Culver requires factfinders to calculate damages resulting from lost future earnings according to a below-market-discount method. This method involves two steps. First, the factfinder must calculate a future “income stream” amount by estimating the wage increases the plaintiff would have received each year as a result of all factors other than inflation. 3 Id. at 118. Then, because this figure will not represent a fixed amount, and will be subject to the effects of inflation, the factfinder must apply a below-market discount rate to discount the *623 future income stream amount to present value. Id. Arguably, the district court properly conducted the first step of the below-market-discount method in calculating Rhodes’s damages for lost future wages. The district court’s finding that Rhodes would have received a five percent raise in September 1990 could be construed as an estimation of the wage increases that Rhodes would have received as a result of all factors other than inflation. However, the district court plainly failed to properly conduct the second step of the below-market-discount method. The district court adopted a market discount rate of seven percent to calculate the present value of Rhodes’s lost future wages, as opposed to the below-market discount rate required by Culver. 4 For this reason, we find that the district court’s calculation of damages concerning Rhodes’s front pay was clearly erroneous.
3
Rhodes next contends that the district court erred by not awarding damages allegedly resulting from his loss of fringe benefits. A plaintiff suing under the ADEA may recover damages as compensation for pecuniary losses of fringe benefits.
Brunnemann,
4
Rhodes next asserts that the district court erred by not awarding prejudgment interest. Although an award of pre
*624
judgment interest is generally considered consistent with the purpose of the ADEA to make the plaintiff whole, the decision whether to award prejudgment interest is within the sound discretion of the district court.
Sellers v. Delgado Community College,
Ill
Accordingly, we AFFIRM the district court’s denial of Rhodes’s motion for directed verdict on the issue of willfulness. We VACATE the district court’s award of damages, and we REMAND to the district court for further proceedings consistent with this opinion.
Notes
. On remand, the Eighth Circuit expressly incorporated by reference its earlier analysis concerning the plaintiff's pension benefits.
See Glover v. McDonnell Douglas Corp.,
. As we stated in
Culver,
a trial court adopting a pre-tax discount rate between one and three percent will not be reversed so long as the trial court explains its choice.
Culver,
. Even in an inflation-free economy, employee wages tend to increase over time from a number of factors, such as individual promotions and industry-wide growth. Culver,
. We recognize the somewhat formal nature of this analysis, but we note that
Culver
is a very formal opinion. One of the available methods we discussed in
Culver
is the "case-by-case” method. According to this method, the factfin-der estimates the wage increases the plaintiff would have received as a result of all factors
including
inflation.
Culver,
. While Rhodes received five weeks of paid vacation at Guiberson Oil Tools, he receives two weeks of paid vacation from his present employer. However, Rhodes’s assertion that he should receive three weeks' salary per year as compensation for his loss of vacation time is without merit. Rhodes’s damages for lost wages were computed based on a fifty-two week work year. Allowing recovery of three weeks’ salary as compensation for loss of vacation time would result in Rhodes receiving fifty-five weeks' salary in lost wages per year. Rhodes presented no evidence indicating that he would have been paid three extra weeks’ salary at Guiberson Oil Tools had he only taken two of his five weeks’ vacation time. Thus, valuation of his loss of leisure time must come from some source other than reference to his salary.
.Rhodes testified that all of these recreational activities were provided by Guiberson Oil Tools primarily for business purposes, such as client entertainment. Rhodes also testified that his present employer would reimburse him for similar expenses incurred in connection with his present employment.
. The district court is, of course, free to reconsider this finding on remand in light of the changes to Rhodes’s damage award required by this opinion.
