Résumé : The tertiary sector is increasingly playing a larger role in the economy, particularly in advanced countries. This chapter documents the growing linkages of the service sector with the rest of the economy and how liberalization has contributed to increasing such linkages. Input-output analysis is used to uncover the links between the tertiary sector and the rest of the economy. The tertiary sector is defined in a fairly broad manner by excluding only manufacturing, mining, agriculture, and construction.