This book is the result of several years of experience in teaching principles and methods of demographic analysis at the Department of Demography of the University of Louvain. Chapters 1 and 2 deal with the basic principles and methods involved in the two approaches demographers usually take, i.e., cohort and period analysis. Chapters 3-6 are devoted to applying these principles and methods to the particular phenomena with which the demog­ rapher is especially concerned: mortality, nuptiality, natality, and spatial mobility. In order to maintain coherence, examples have been placed at the end of each major section instead of being dispersed throughout the text. This should enable the reader to grasp both the theory and the example as a whole, rather than envisaging the theory as a particular reply to a specific problem. Finally, each chapter ends with a list of references, to which is added a selection of major books and articles in population analysis drawn mainly from the American, British, and French demographic literature.