Adults tend to lose their information-processing skills as they age, especially if they do not use them. While older adults may compensate for this loss by developing other valuable skills, the importance of being proficient in information-processing skills in determining wages and employment does not diminish as workers age. Probably the most cost-effective way to ensure that economies do not suffer unduly as the working population ages is to ensure that students leave initial schooling with at least a basic set of information-processing skills on which they can build as they grow older. More opportunities for high-quality adult and on-the-job training should also be made available so that older adults can maintain the skills the already have and acquire new ones. The Survey of Adult Skills finds that adults aged 55 to 65 are less proficient in literacy and numeracy than adults aged 25 to 34. Differences in skills proficiency that are related to age vary widely across countries, implying that skills policies can affect the evolution of proficiency over a lifetime. While older adults are generally less proficient than younger adults, they do no worse--and often better--than younger adults in terms of labour market outcomes. [For "Skills Matter: Further Results from the Survey of Adult Skills," see ED567018.]