Ayles, 784 F.2d 1275 (5th Cir.1986); Thornbrough v. Columbus & Greenville R.R. Co., 760 F.2d 633, 639 (5th Cir.1985). The defendant must respond with non-discriminatory reasons for taking such action against the plaintiff. Thereafter, the plaintiff must show that defendant’s offered reasons are merely pretex-tual and that a discriminatory reason (age) more than likely underlies the actions taken by the defendant. Harpring v. Continental Oil Co., 628 F.2d 406, 409 (5th Cir.1980), cert. denied, 454 U.S. 819, 102 S.Ct. 100, 70 L.Ed.2d 90 (1981). As in a Title VII case, the plaintiff has the burden of proof on all elements of an age discrimination cause of action. Powell v. Rockwell Int’l Corp., 788 F.2d 279 (5th Cir.1986). See also Laurence v. Chevron, U.S.A., 885 F.2d 280 (5th Cir. 1989) (<HOLDING>). To ultimately prevail on an age
holding that plaintiff bears burden of production as well as persuasion holding plaintiff to his burden of persuasion on appeal of summary judgment holding that a debtor bears the burden of persuasion under  1325a holding that the defendants burden at this stage is one of production not one of persuasion holding that employer bears the full burden of persuasion for the facts requisite to an exemption