The product is a textbook titled "Longitudinal Research" within the Quantitative Applications in the Social Sciences series. Published by SAGE in the United States, the book is written in English and geared towards both advanced and intermediate levels in the field of data analysis. Authored by various contributors, this paperback textbook focuses on social sciences research methods, specifically in the area of longitudinal studies. With a comprehensive approach to the subject, this book is a valuable resource for students and professionals in the field seeking to enhance their understanding and skills in data analysis.