Similar title to Barot, S., Heino, M. ORCID: https://orcid.org/0000-0003-2928-3940, O'Brien, L., & Dieckmann, U. ORCID: https://orcid.org/0000-0001-7089-0393 (2003). Estimating Reaction Norms for Age and Size at Maturation When Age at First Reproduction is Unknown. IIASA Interim Report. IIASA, Laxenburg, Austria: IR-03-043