This report develops a conceptual foundation for a measurement framework that captures learning trajectories across the life course and diverse contexts, and enables systematic assessment of how policies shape participation and outcomes. It provides policymakers with a comprehensive approach to understanding how lifelong learning (LLL) systems function, where gaps exist, and how interventions can strengthen opportunities across populations.
LLL has become a central policy lever for productivity, inclusion, and resilience in the face of demographic ageing, technological change, and evolving skill demands. Yet existing data systems were designed mainly to measure educational attainment and training participation at specific life stages. They do not adequately capture learning as a lifelong and life-wide phenomenon, creating four major limitations that constrain policy design and evaluation.
First, coverage is too narrow across the life course. Most international measurement focuses on adults aged 25-64, offering limited visibility into learning outside formal schooling in childhood and excluding adults over 64. Learning through families, communities, and digital environments is largely invisible, despite its growing importance. As a result, critical phases of human development, skill maintenance, and the links between them remain poorly understood.
Second, measurement is largely cross-sectional, providing static snapshots rather than tracking learning over time. Current instruments do not follow how skills evolve through key life transitions such as entering the workforce, changing occupations, forming families, or retiring. The absence of systematic longitudinal linkages between surveys like the Programme for International Student Assessment (PISA) and Programme for the International Assessment Competencies (PIAAC) prevents a coherent view of skill development across decades. Policymakers cannot assess whether early investments yield long-term returns or identify where trajectories diverge.
Third, outcomes are too focused on the labour market. While employability and earnings matter, learning also produces broader social benefits, including civic participation, health literacy, social cohesion, personal agency, and wellbeing. These wider returns are largely absent from current metrics, limiting understanding of the full value of LLL and narrowing policy debates to economic productivity alone.
Fourth, informal learning is insufficiently captured. Much skill development occurs through everyday activities in workplaces, families, communities, and increasingly through digital resources such as online tutorials and platforms. These forms of learning remain weakly measured, creating blind spots precisely where learning is expanding most rapidly.