Aging and old age as social, biological, and economic phenomena -- What is aging, and why? -- Old age past, present, and future -- A human-capital model of aging -- An economic model of aging with change assumed -- The economic theory elaborated and applied -- The economic psychology of the old -- Behavioral correlates of age -- Age, creativity, and output -- Adjudication and old age -- The status of the old and the aging of institutions -- Normative issues -- Euthanasia and geronticide -- Social security and health -- Legal issues of aging and old age -- Age discrimination by employers and the issue of mandatory retirement.