3.1. Population and sample The research is based on the study of the rating of TV programmes on their respective television channels and a Delphi questionnaire supplied to a panel of experts on this topic, working on each of the TV channels under study. The panel of experts was completed with the opinion of two executives from Spanish audiovisual production companies (Mediapro and Globomedia), the Heads of Programming from a broadband/fibre optic television operator (ONO) and two former programming directors from free-to-air national TV networks, namely TVE and La 10/Vocento.
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