What is the test for determining whether a disabled person can perform other work that exists in the national economy?

of work). The Commissioner must show that the claimant can perform other work that exists in significant numbers in the national economy by "taking into consideration the claimant's residual functional capacity, age, education, and work experience." Tackett v. Apfel, 180 F.3d 1094, 1100 (9th Cir. 1999); see also 20 C.F.R. 404.1566 (describing "work which exists in the national economy"). If the Commissioner meets this burden, then the claimant is not disabled. Bustamante, 262 F.3d at 954. However, if the Commissioner fails to meet this burden, then the claimant is disabled. Id.