Steele Hays, Justice.
This is a Workers’ Compensation case. Claimant/appellant is Steven Grimes. Respondents/appellees are North American Foundry and its carrier. Grimes sustained a compensable injury to his back on August 20, 1987. He received temporary total disability for three months and returned to his employment at the foundry on November 23. Fifteen months later he was laid off along with other employees.
An administrative law judge determined that Grimes had sustained a seventeen percent permanent partial disability, seven percent of which was attributable to an impairment rating and ten percent due to wage loss. Both parties appealed to the Commission, which remanded the case to the administrative law judge to determine whether Grimes was laid off as a result of his injury or for economic reasons.
The administrative law judge reinstated his previous award, at the same time finding that Grimes was laid off for economic reasons. North American Foundry appealed and the Commission, with one dissenting member, agreed with the seven percent anatomical impairment rating but held that Grimes had not suffered a loss in wage earning capacity attributable to his injury.
On appeal to the Court of Appeals, Grimes assigned three errors to the Commission: it erred in remanding the case to the administrative law judge for additional evidence, erred in denying benefits in excess of seven percent and erred in the interpretation of Ark. Code Ann. § 11-9-522 (1987). By a vote of three to three the Court of Appeals affirmed the Commission and, because of the tie vote, we granted Grimes’s petition to review the decision of the Court of Appeals. We now affirm the Commission.
I
Citing Gencorp Polymer Products v. Landers, 36 Ark. App. 190, 820 S.W.2d 475 (1991) and Ark. Code Ann. § 11-9-705(c)(l)(1987), Grimes argues the Commission abused its discretion in initially remanding the case to the administrative law judge for additional evidence when no request for a hearing for the introduction of additional evidence had been filed by either party. Grimes maintains the remand gave the appellee/respondent a second chance to present sufficient evidence to carry its burden of proof. Appellee points out in response that it was Grimes who benefitted from the remand because the burden of proof at that hearing rested on the claimant, not on the appellee.
In its ensuing opinion the Commission explained why the remand was warranted:
It appears that the significance of why we remanded this case may have been lost. The issue is whether the claimant has met his burden of proving by a preponderance of the evidence that he has suffered a loss in wage earning capacity. The question of whether claimant is laid off for economic reasons or as a result of his compensable injury is extremely relevant in determining whether the claimant has met his burden of proof.
* * * *
Further, this is a very important factor because if the claimant had not been laid off for economic reasons, he would still be earning the same wages or greater wages than those he was earning at the time of the accident. This indicates that the claimant’s earning capacity has not been diminished, as a result of his injury, but that he was simply laid off along with other employees of the company for economic reasons. While the claimant is currently working for D & N Machine making $5.25 or $5.50 per hour as opposed to $6.15 per hour he was earning when he was laid off, the claimant has offered insufficient proof that he took a lesser paying job because of his compensable injury.
Section ll-9-705(c)(l) provides that each party shall present all oral or documentary evidence at the initial hearing. It also provides that further hearings for additional evidence “will be granted only at the discretion of the hearing officer or the Commission.” The statute also provides that a request for a hearing must show the substance of the evidence to be presented.
Undoubtedly this section was intended to inhibit piece-meal proceedings in workers’ compensation cases, but without foreclosing the Commission’s discretion to order additional hearings when appropriate. As it is clear from the statute that the Commission has the authority to do what was done in this case, the only question is, was it an abuse of discretion? Since there were sound reasons for the remand and it inured no less to the benefit of the claimant than to the respondent, we cannot say the Commission’s discretion was abused.
Nor do we read the Gencorp case as mandating a reversal of the Commission’s order of remand. The administrative law judge in Gencorp had “reserved for future determination” claimant’s entitlement to temporary total disability and the Commission affirmed and adopted that ruling. Reversing, the Court of Appeals observed that it is the duty of the Commission to translate the evidence on all issues into findings of fact [Sanyo Manufacturing Corporation v. Leisure, 12 Ark. App. 274, 675 S.W.2d 841 (1984)], whereas, reserving a material issue for future determination was not a finding of fact, but a declination to find a fact. Granted, the opinion takes note of § 1 l-9-705(c)(l), requiring that all evidence be presented at the initial hearing and that the claimant had been allowed “a second bite at the apple.” However, the greater emphasis, we believe, was placed on the failure to make the finding of fact, as opposed to the order of remand, as evidenced by the comment:
“disregarding its duty to find the facts in order to give the appellee [claimant] the benefit of the doubt is not within the Commission’s authority,” citing Allen Canning Co. v. McReynolds, 5 Ark. App. 78, 632 S.W.2d 450 (1982).
Gencorp, supra, at 195.
The intimations of that opinion, as we read it, are that the reversible error lay in the failure of the administrative law judge and the Commission to make an essential finding of fact and the reference to § ll-9-705(c)(l) was merely surplusage. Whether that is an accurate reading of Gencorp we leave to the Court of Appeals. It is enough to note that § ll-9-705(c)(l) specifically contemplates that while all evidence is to be offered at the initial hearing, the Commission and the administrative law judge have the discretionary power to permit the introduction of additional evidence. We cannot say the Commission exceeded the authority given it under the statute by ordering additional evidence in this instance.
II
Second, Grimes submits the Commission erred in denying disability benefits in excess of seven percent to the body as a whole. Steven Grimes is a thirty-six year old high school graduate with a long and productive record of employment. Prior to his injury Grimes had obtained 140 hours of community college training in machine shop, carpentry and automotive repair. He had no problems before but can no longer do carpentry or automotive work because of his injuries. Before being hired by the foundry Grimes worked for ten years for Whirlpool.
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Steele Hays, Justice.
This is a Workers’ Compensation case. Claimant/appellant is Steven Grimes. Respondents/appellees are North American Foundry and its carrier. Grimes sustained a compensable injury to his back on August 20, 1987. He received temporary total disability for three months and returned to his employment at the foundry on November 23. Fifteen months later he was laid off along with other employees.
An administrative law judge determined that Grimes had sustained a seventeen percent permanent partial disability, seven percent of which was attributable to an impairment rating and ten percent due to wage loss. Both parties appealed to the Commission, which remanded the case to the administrative law judge to determine whether Grimes was laid off as a result of his injury or for economic reasons.
The administrative law judge reinstated his previous award, at the same time finding that Grimes was laid off for economic reasons. North American Foundry appealed and the Commission, with one dissenting member, agreed with the seven percent anatomical impairment rating but held that Grimes had not suffered a loss in wage earning capacity attributable to his injury.
On appeal to the Court of Appeals, Grimes assigned three errors to the Commission: it erred in remanding the case to the administrative law judge for additional evidence, erred in denying benefits in excess of seven percent and erred in the interpretation of Ark. Code Ann. § 11-9-522 (1987). By a vote of three to three the Court of Appeals affirmed the Commission and, because of the tie vote, we granted Grimes’s petition to review the decision of the Court of Appeals. We now affirm the Commission.
I
Citing Gencorp Polymer Products v. Landers, 36 Ark. App. 190, 820 S.W.2d 475 (1991) and Ark. Code Ann. § 11-9-705(c)(l)(1987), Grimes argues the Commission abused its discretion in initially remanding the case to the administrative law judge for additional evidence when no request for a hearing for the introduction of additional evidence had been filed by either party. Grimes maintains the remand gave the appellee/respondent a second chance to present sufficient evidence to carry its burden of proof. Appellee points out in response that it was Grimes who benefitted from the remand because the burden of proof at that hearing rested on the claimant, not on the appellee.
In its ensuing opinion the Commission explained why the remand was warranted:
It appears that the significance of why we remanded this case may have been lost. The issue is whether the claimant has met his burden of proving by a preponderance of the evidence that he has suffered a loss in wage earning capacity. The question of whether claimant is laid off for economic reasons or as a result of his compensable injury is extremely relevant in determining whether the claimant has met his burden of proof.
* * * *
Further, this is a very important factor because if the claimant had not been laid off for economic reasons, he would still be earning the same wages or greater wages than those he was earning at the time of the accident. This indicates that the claimant’s earning capacity has not been diminished, as a result of his injury, but that he was simply laid off along with other employees of the company for economic reasons. While the claimant is currently working for D & N Machine making $5.25 or $5.50 per hour as opposed to $6.15 per hour he was earning when he was laid off, the claimant has offered insufficient proof that he took a lesser paying job because of his compensable injury.
Section ll-9-705(c)(l) provides that each party shall present all oral or documentary evidence at the initial hearing. It also provides that further hearings for additional evidence “will be granted only at the discretion of the hearing officer or the Commission.” The statute also provides that a request for a hearing must show the substance of the evidence to be presented.
Undoubtedly this section was intended to inhibit piece-meal proceedings in workers’ compensation cases, but without foreclosing the Commission’s discretion to order additional hearings when appropriate. As it is clear from the statute that the Commission has the authority to do what was done in this case, the only question is, was it an abuse of discretion? Since there were sound reasons for the remand and it inured no less to the benefit of the claimant than to the respondent, we cannot say the Commission’s discretion was abused.
Nor do we read the Gencorp case as mandating a reversal of the Commission’s order of remand. The administrative law judge in Gencorp had “reserved for future determination” claimant’s entitlement to temporary total disability and the Commission affirmed and adopted that ruling. Reversing, the Court of Appeals observed that it is the duty of the Commission to translate the evidence on all issues into findings of fact [Sanyo Manufacturing Corporation v. Leisure, 12 Ark. App. 274, 675 S.W.2d 841 (1984)], whereas, reserving a material issue for future determination was not a finding of fact, but a declination to find a fact. Granted, the opinion takes note of § 1 l-9-705(c)(l), requiring that all evidence be presented at the initial hearing and that the claimant had been allowed “a second bite at the apple.” However, the greater emphasis, we believe, was placed on the failure to make the finding of fact, as opposed to the order of remand, as evidenced by the comment:
“disregarding its duty to find the facts in order to give the appellee [claimant] the benefit of the doubt is not within the Commission’s authority,” citing Allen Canning Co. v. McReynolds, 5 Ark. App. 78, 632 S.W.2d 450 (1982).
Gencorp, supra, at 195.
The intimations of that opinion, as we read it, are that the reversible error lay in the failure of the administrative law judge and the Commission to make an essential finding of fact and the reference to § ll-9-705(c)(l) was merely surplusage. Whether that is an accurate reading of Gencorp we leave to the Court of Appeals. It is enough to note that § ll-9-705(c)(l) specifically contemplates that while all evidence is to be offered at the initial hearing, the Commission and the administrative law judge have the discretionary power to permit the introduction of additional evidence. We cannot say the Commission exceeded the authority given it under the statute by ordering additional evidence in this instance.
II
Second, Grimes submits the Commission erred in denying disability benefits in excess of seven percent to the body as a whole. Steven Grimes is a thirty-six year old high school graduate with a long and productive record of employment. Prior to his injury Grimes had obtained 140 hours of community college training in machine shop, carpentry and automotive repair. He had no problems before but can no longer do carpentry or automotive work because of his injuries. Before being hired by the foundry Grimes worked for ten years for Whirlpool. At the time of his termination by the foundry Grimes was earning $6.15 per hour. As a machine operator he pushed large sand molds weighing eighty pounds or so and was on his feet all day.
Grimes suffered a herniated disc when he slipped and fell climbing onto a conveyer. He underwent a CAT scan which revealed a moderate bulging of the disc in the lumbar spine. An MRI showed a herniated disc, L5-S1, which was treated conservatively. On May 18, 1988, Grimes’s physician described his condition as “asymptomatic at the present time.” Grimes continued his employment at the foundry until he and others were terminated on February 9, 1989.
At the behest of the administrative law judge, Grimes was examined by an independent physician who diagnosed a herniated disc at the L5-S1 vertebrae level with decreased motion of the lumbar spine, but “no hard neurological symptoms other than a very mild decrease in the ability to extend the great toe which is not a functional deficit. Additional treatments, if Mr. Grimes feels this problem is too painful to live with, would be excision of the disc, and I would rate him with approximately thirteen percent total body impairment as he stands at this time.”
Three or four weeks after his termination at the foundry Grimes found employment at D & N Machinery earning $4.00 an hour operating a computerized milling machine. Grimes testified his employers were aware of his condition and required no heavy lifting on his part.
In sum, Grimes submits that when his age, education, experience, physical impairment and other factors affecting his earning capacity are weighed, there is no substantial evidence on which to base an award of seven percent permanent partial disability.
Appellee cites countervailing evidence: Dr. Raby’s testimony, taken on March 1, 1990, was the most recent evidence as to Grimes’s condition. Dr. Raby allocated a rating of ten to thirteen percent, but he also conceded that it should be seven percent under the guidelines of the AMA. Also, the neurological examination of Dr. Reul, on January 19, 1990, contained the following:
COMMENTS: He has a completely normal neurological examination, and EMG-NCV of left lower extremities is normal. MRI scan shows no significant pathology at this point and I would feel there is no neurological basis for his complaints.
According to appellee, the “most compelling evidence” that Grimes suffered no wage loss disability is the fact that he returned to work in November 1987 at the'same wage rate and continued to earn at that level until his discharge in February 1989. There was no evidence that Grimes missed any work at D & N Machining because of his back, or that standing on his feet all day posed any difficulties for him.
In determining the sufficiency of the evidence to sustain the findings of the Workers’ Compensation Commission, we weigh the evidence in the light most favorable to the findings of the Commission and affirm if there is substantial evidence to support such findings. Cummings v. United Motor Exchange, 236 Ark. 735, 368 S.W.2d 82 (1963). In so doing, we recognize that it is the prerogative of the Commission to determine issues of weight and credibility. Bankston v. Prime West Corporation, 271 Ark. App. 727, 610 S.W.2d 586 (1981). Beginning with Glass v. Edens, 233 Ark. 786, 346 S.W.2d 685 (1961), the wage loss factor is defined, in contradistinction to the functional or anatomical loss, as the extent to which a compensable injury has affected the claimant’s ability to earn a livelihood. Rooney & Travelers Insurance Co. v. Charles, 262 Ark. 695, 560 S.W.2d 797 (1978). Attendant factors include medical evidence, age, education, experience and other circumstances reasonably related to a claimant’s earning power. Perry v. Mar-Bax Shirt Co., 16 Ark. App. 133, 698 S.W.2d 302 (1985).
While there was evidence of substance in this record to support a finding greater than the rating awarded, we cannot say the finding of the Commission of seven percent of the body as a whole is not supported by substantial evidence.
Ill
The final point involves a procedural discrepancy which we think is effectually resolved by our disposition of the first point. Grimes asks us to hold the Commission erred in its interpretation of Ark. Code Ann. § ll-9-522(b) (1987). A part of that provision purports to disentitle an employee to benefits in excess of the percentage of permanent physical impairment so long as he or she has returned to work, or had a bona fide offer of work, at the same wage level.
On remand the administrative law judge, though reinstating his original award of seven percent and ten percent, made a finding that Grimes was laid off from North American Foundry for economic reasons. When that opinion was appealed by the employer there was no cross-appeal by Grimes, prompting the Commission to declare the finding to be res judicata.
Grimes relies on White v. Air Systems, Inc., 33 Ark. App. 56, 800 S.W.2d 726 (1990), as support for the premise that res judicata applies only to final orders and a timely appeal to the Commission from an administrative law judge by either side prevents such order from becoming final. Assuming, without deciding, that to be a correct interpretation of White, we do not read the Commission’s opinion as relying on § ll-9-622(b) in denying wage loss benefits. Rather, it is evident the Commission relied on a variety of factors, including those mentioned under Point I, in rendering its opinion.
For the reasons stated, the order appealed from is affirmed.
Dudley and Glaze, JJ., dissent.