Baltes, P. B., & Smith, J. (2001). Learned helplessness. In G. L. Maddox (Ed.), The Encyclopedia of Aging: A comprehensive resource in gerontology and geriatrics (3rd ed., pp. 585–586). Springer.

Baltes, P. B., & Smith, J. (2001). Developmental psychology. In G. L. Maddox (Ed.), The encyclopedia of aging: A comprehensive resource in gerontology and geriatrics (3rd ed., Vol. 1, pp. 289–291). Springer.

Lindenberger, U., Gilberg, R., Little, T. D., Nuthmann, R., Pötter, U., & Baltes, P. B. (2001). Sample selectivity and generalizability of the results of the Berlin Aging Study. In P. B. Baltes & K. U. Mayer (Eds.), The Berlin Aging Study: Aging from 70 to 100 (pp. 56–82). Cambridge University Press.

Mayer, K. U., Baltes, P. B., Baltes, M. M., Borchelt, M., Delius, J. A. M., Helmchen, H., Linden, M., Smith, J., Staudinger, U. M., Steinhagen-Thiessen, E., & Wagner, M. (2001). What do we know about old age and aging? Conclusions from the Berlin Aging Study. In P. B. Baltes & K. U. Mayer (Eds.), The Berlin Aging Study: Aging from 70 to 100 (pp. 475–519). Cambridge University Press.

Smelser, N. J., & Baltes, P. B. (2001). Preface. In International Encyclopedia of the Social and Behavioral Sciences (Vol. 1, pp. XXVII-XXIX). Elsevier Science.

Smelser, N. J., & Baltes, P. B. (2001). Introduction. In N. J. Smelser & P. B. Baltes (Eds.), International encyclopedia of the social and behavioral sciences (Vol. 1, pp. XXXI-XLVIII). Elsevier Science.

Smith, J., & Baltes, P. B. (2001). Trends and profiles of psychological functioning in very old age: Anticipating future life goals and managing personal development. In P. B. Baltes & K. U. Mayer (Eds.), The Berlin Aging Study: Aging from 70 to 100 (pp. 197–226). Cambridge University Press.

Staudinger, U. M., & Baltes, P. B. (2001). Entwicklungspsychologie der Lebensspanne. In H. Helmchen, F. A. Henn, H. Lauter, & N. Sartorius (Eds.), Psychiatrie spezieller Lebenssituationen (pp. 3–17). Springer.

Baltes, P. B. (2000). Autobiographical reflections: From developmental methodology and lifespan psychology to gerontology. In J. E. Birren & J. J. F. Schroots (Eds.), A history of geropsychology in autobiography (pp. 7–26). American Psychological Association.

Baltes, P. B. (2000). Gegen Vorurteile und Klischees: Die Berliner Altersstudie - neue Erkenntnisse über die Zielgruppe alte Menschen. In T. Nikolaus (Ed.), Klinische Geriatrie (pp. 80–87). Springer.

Baltes, P. B. (2000). David Magnusson: The footprints of wisdom. In L. Bergman (Ed.), Developmental science and the holistic approach (pp. 11–29). Cambridge University Press.

Baltes, P. B. (2000). Gustav Lienert: Ein magischer Schlüssel zur deutschen Psychologie. In M. Tilley (Ed.), Unterwegs mit Lienert (2nd., ext. ed., pp. 167–169). Pabst Science Publishers.

Baltes, P. B., Mayer, K. U., Helmchen, H., Steinhagen-Thiessen, E., & Neher, K. M. (2000). Arbeitsgruppe "Altern und gesellschaftliche Entwicklung (AGE)": Projektgruppe "Berliner Altersstudie (BASE)". In Berlin-Brandenburgische Akademie der Wissenschaften (Ed.), Jahrbuch (Vol. 1999, pp. 187–198). Akademie-Verlag.

Freund, A. M., & Baltes, P. B. (2000). The orchestration of selection, optimization, and compensation: An action-theoretical conceptualization of a theory of developmental regulation. In W. J. Perrig & A. Grob (Eds.), Control of human behavior, mental processes and consciousness (pp. 35–58). Erlbaum.

Lindenberger, U., & Baltes, P. B. (2000). Life span psychology theory. In A. E. Kazdin (Ed.), Encyclopedia of psychology (Vol. 5, pp. 52–57). Oxford University Press.

Pasupathi, M., & Baltes, P. B. (2000). Wisdom. In A. E. Kazdin, E. B. Blanchard, R. R. Bootzin, G. H. Bower, J. C. Conoley, & K. Deaux (Eds.), Encyclopedia of psychology (Vol. 8, pp. 249–253). APA Books.

Staudinger, U. M., & Baltes, P. B. (2000). Entwicklungspsychologie der Lebensspanne. In H. Helmchen, F. A. Henn, H. Lauter, & N. Sartorius (Eds.), Psychiatrie spezieller Lebenssituationen (4th ed., pp. 3–17). Springer.

Baltes, P. B. (1999). Psychologie als Sozialwissenschaft: Festrede. In F. E. W.: Festreden anläßlich der Emeritierung von Franz Emanuel Weinert (pp. 27–67). Max-Planck-Institut für psychologische Forschung.

Baltes, P. B. (1999). L'architettura incompiuta dell'ontogenesi umana: Implicazioni per il futuro della quarta età. In C. M. Lucchetti & A. Venturelli (Eds.), Ambiente e invecchiamento: Politiche e strategie di ricerca in Germania e in Italia (pp. 169–192). Guerini Studio.

Baltes, P. B. (1999). Theoretical propositions of life-span developmental psychology: On the dynamics between growth and decline. In R. M. Lerner & J. V. Lerner (Eds.), Adolescence: Development, diversity and context: Vol. 1. Theoretical foundations and biological bases of developmental in adolescence (pp. 37–52). Garland.