Both federal and state law prohibits employers from discriminating against employees on the basis of age. (Gov. Code, § 12941, subd. (a); 42 U.S.C. § 2000e et seq.; 29 U.S.C. § 621 et seq.)1
An employee alleging age discrimination must ultimately prove that the adverse employment action taken was based on his or her age. Since direct evidence of such motivation is seldom available, the courts use a system of shifting burdens as an aid to the presentation and resolution of age discrimination cases. (See St. Mary’s Honor Center v. Hicks (1993) 509 U.S. 502, 505-506 [113 S.Ct. 2742, 2746-2749, 125 L.Ed.2d 407]; Texas Dept. of Community Affairs v. Burdine (1981) 450 U.S. 248, 252-255 [101 S.Ct. 1089, 1093-1095, 67 L.Ed.2d 207]; McDonnell Douglas Corp. v. Green (1973) 411 U.S. 792, 800-803 [93 S.Ct. 1817, 1823-1825, 36 L.Ed.2d 668]; Caldwell v. Paramount Unified School Dist. (1995) 41 Cal.App.4th 189, 195-199 [48 Cal.Rptr.2d 448].; That system necessarily establishes the basic framework for reviewing motions for summary judgment in such cases. (Sada v. Robert F. Kennedy Medical Center, supra, 56 Cal.App.4th at p. 148; Addy v. Bliss & Glennon (1996) 44 Cal.App.4th 205, 216 [51 Cal.Rptr.2d 642]; Caldwell v. Paramount Unified School Dist., supra, 41 Cal.App.4th at pp. 201-205.)
The burden-shifting system requires the employee first establish a prima facie case of age discrimination. If the employee does so, the employer is required to offer a legitimate non-age-based reason for the adverse employment action. If it does not, then the employee prevails. (See St. Mary’s Honor Center v. Hicks, supra, 509 U.S. at pp. 505-507 [113 S.Ct. at pp. 2746-2747]; Texas Dept. of Community Affairs v. Burdine, supra, 450 U.S. at pp. 252-255 [101 S.Ct. at pp. 1093-1095]; McDonnell Douglas Corp. v. Green, supra, 411 U.S. at pp. 800-803 [93 S.Ct. at pp. 1823-1825]; Sada v. Robert F. Kennedy Medical Center, supra, 56 Cal.App.4th at pp. 148-151; Caldwell v. Paramount Unified School Dist., supra, 41 Cal.App.4th at pp. 195-199.)
Given the varying nature of the problem, it is impossible to make an exact, all-inclusive statement of the elements of a prima facie age discrimination case applicable in all situations. (Ewing v. Gill Industries, Inc. (1992) 3 Cal.App.4th 601, 610 [4 Cal.Rptr.2d 640]; 1 Lindemann & Grossman, Employment Discrimination Law (3d ed. 1996) ch. 16, pp. 586-587.) The general requirement is that the employee offer circumstantial evidence such that a reasonable inference of age discrimination arises. The requirement is
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While state and federal legislation concerning age discrimination differs in some respects, their objectives are identical, and courts of this state have looked to federal law to aid in the interpretation of analogous provisions of California statutes. (Caldwell v. Paramount Unified School Dist. (1995) 41 Cal.App.4th 189, 195 [48 Cal.Rptr.2d 448].)