Resumen: We study whether pension fund managers, as professionals of important social and financial products, are able to add value for their clients and adapt to economic changes. To this end, we analyze the performance and skills (market timing and stock picking) over the economic cycle from both pension fund and manager perspectives. This double analysis allows examining whether skills reside in managers and/or funds and control for manager substitutions. Despite the long-term nature of pension funds, we find that both fund and manager skills vary with market conditions, showing better evidence of stock-picking in booms, and of market timing in recessions. Nonetheless, top (bottom) funds and managers exhibit both (incorrect) skills in booms and in recessions. Some of the top (bottom) funds and managers are the best (worst) in both abilities in the same periods, but not in different periods, showing that not all managers have the ability to adapt to market conditions. Additionally, managers with limited skills tend to specialize because diversification requires multi-task skills and the non-specialization of these managers usually results in incorrect skills. Idioma: Inglés DOI: 10.1080/1351847X.2016.1239585 Año: 2018 Publicado en: EUROPEAN JOURNAL OF FINANCE 24, 1 (2018), 36-58 ISSN: 1351-847X Factor impacto JCR: 1.124 (2018) Categ. JCR: BUSINESS, FINANCE rank: 71 / 103 = 0.689 (2018) - Q3 - T3 Factor impacto SCIMAGO: 0.533 - Economics, Econometrics and Finance (miscellaneous) (Q1)