This book explores the linkages between age-related pension expenditures and the fiscal space needed to fund them, as well as to organize the mix of financing methods with different risk-sharing arrangements. After critically assessing the existing models projecting age-related expenditure in the literature, the book focuses on the case studies of these inter-linkages in four highly-populated East Asian countries, namely China, Indonesia, India, and Japan. Nearly two- fifths of the global population live in these countries. Therefore, how these inter-linkages manifest themselves and the...