About three decades ago, the authors contributed to the knowledge of tourism with a micro-economic vision, which complements and corrects the sociological one, which has been hegemonic for more than a century and has become dogmatic for many years. From this viewpoint, it becomes clear that tourism is a product that, like any other, can be objectively identified apart from the subject that consumes it. It thus avoids the serious anomaly suffered by the conventional doctrine according to which tourism is the heterogeneous and confused set of industrial activities that respond to the needs of tourists. Corrected and avoided such an erroneous view, the alternative approach allows the question to be rethought with an emphasis on the visit programme and, therefore, to identify univocally and objectively both the product and the tourism industry.