Dear Bidder, The International Labour Office (ILO) is seeking an individual serving as an External Collaborator. Below is a summary of the work to be performed: The consultant, under the supervision of a senior econometrician, will support the ILO’s work on the implementation and operationalisation of methodologies for producing global estimates of privately imposed forced labour within the framework of the Global Estimates of Modern Slavery (GEMS). The assignment will focus on data preparation, integration, and statistical implementation of estimation approaches across countries with differing data availability and missing-data structures. The consultant will contribute to the assessment, application, and documentation of methodological approaches for combining multiple data sources, including household surveys, administrative data, forced labour surveys, and return-migrant surveys. Particular attention will be given to analysing and addressing item and unit nonresponse, implementing imputation strategies, and integrating evidence from heterogeneous sources, including for countries with limited or no microdata. The assignment will also involve close collaboration with the ILO team to produce national-level estimates for selected country typologies, test and compare alternative estimation strategies for forms of exploitation that are poorly captured in household surveys, and document reproducible analytical workflows and code to support current and future global estimation exercises. If you are interested, please express your interest and follow the instructions attached to consult the detailed terms of reference and other relevant information available on the ILO e-sourcing platform. Please submit your proposal before the specified deadline. Thank you.