title: Factors and forces influencing pension plan costs.
mesh_terms: D000368:Aged; D006233:Persons with Disabilities; D004467:Economics; D004608:Eligibility Determination; D006761:Hospitals; D006801:Humans; D007182:Income; D007878:Legislation as Topic; D008875:Middle Aged; D010415:Pensions; D012179:Retirement; D012943:Social Security