Similar title to Lutz, W. ORCID: https://orcid.org/0000-0001-7975-8145 & Sanderson, W.C. (2005). Toward a concept of population balance considering age-structure, human capital, and intergenerational equity. In: Population, Resources and Development: Riding the Age Waves - Volume 1. Eds. Tuljapurkar, S., Pool, I., & Prachuabmoh, V., Dordrecht: Springer-Verlag. 10.1007/1-4020-3464-4.