[MUSIC] During the last 25 years, the number of composite indicators has been increasing almost exponentially. National statistic law offices create several hundred composite indicators to document the composite development. Any organization, governmental or nongovernmental, regional and national or international, has to show figures in order to get hurt for following the rule, if you don't count, you don't count. Some hold the increasing complexity in a globalized world responsible for this development. Others, the urge for measuring everything that could be important. If human beings are the center of political decisions, how and what do we measure? The tallness, age, the wallet, or the health? And how the latter, wouldn't you rather like to know the body mass index or the well-being? These are composite indicators. [MUSIC] Also when talking about wealth, environment or climate, we immediately notice that the measurement can neither be done by one individual indicator, nor by simply adding up of some selected ones. This run for presenting a number has become one of the fundamental challenges in statistics. Who is controlling the quality, dissemination, and correct interpretation of all these numbers? Therefore, the Geneva School of Economics and Management of the University of Geneva, and the KOF ETH Zurich, in collaboration with various international organizations, could use this MOOC to offer education in this area to a broad audience all over the world. This course is for all who wish to acquire a basic understanding of the construction of composite indicators. This is not only important for those who are in some way involved in the creation of a new index or the modification of existing ones. This MOOC is directed to all people who use, work on all these composite indicators like, for example, NGO staff, or journalists. After a detailed but not too technical introduction on the need, demand, and construction of composite indicators, the former directors of statistical offices, professors, politicians, experts from various national and international organizations, like Antal, UNDP, ITC, and Cove, will show how step-by-step the indices were constructed. By critical users, we discuss them afterwards. By this way, you will get armed with the knowledge of how to construct and handle composite indicators or to carefully interpret existing ones. [MUSIC]