The role of digital platform workers, whether they are delivering fastfood or working remotely categorising photographs, has received much attention both in the media and among policymakers. However, there is a lack of comparable and consistent statistics, over time and across countries, on the number of platform workers, their characteristics and their types of jobs and tasks. This review article examines the attempts that have been made to measure the number of digital platform workers, including both traditional surveys and uses of big data, and it highlights the difficulties encountered and offers guidance on future attempts to estimate the number of digital platform workers.

This publication contributes to the OECD's Artificial Intelligence in Work, Innovation, Productivity and Skills (AI-WIPS) programme, which provides policymakers with new evidence and analysis to keep abreast of the fast-evolving changes in AI capabilities and diffusion and their implications for the world of work. The programme aims to help ensure that adoption of AI in the world of work is effective, beneficial to all, peoplecentred and accepted by the population at large. AI

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