Biography

Piero is a DPhil in Law student at St. Peter's College, Oxford. His doctoral dissertation, which is supervised by Professor Ruth Chang, aims to propose a comparativist account of legal reasoning. His doctoral studies are being generously funded by the Peruvian Government, through the "Generación del Bicentenario" Scholarship.

Piero holds a Bachelor's degree from Universidad Católica San Pablo (Peru), and a Magister Juris from Oxford. Though his research interests lie in jurisprudence and legal philosophy, Piero has some relevant work experience on international litigation, particularly international arbitration. 

Publications

Journal Article

Rios Carrillo P, ‘The comparativist structure of legal justification’ [2026] Jurisprudence 
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Rios Carrillo P, ‘On the special normative force of law and the difference it makes’ (2025) 16(4) Jurisprudence 858
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Ríos Carrillo P, ‘Proportionality, Comparability, and Parity: A Discussion on the Rationality of Balancing’ (2023) 29(4) Legal Theory 257
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Rios Carrillo P, ‘Is there a place for arbitration within the reparations system practiced by the Inter-American Court of Human Rights?’ [2020] (84) Derecho PUCP 69
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Postigo J and Rios Carrillo P, ‘From Robert Alexy’s theory of the dual nature to a “moderate natural law theory”. A proposal for the understanding of implied fundamental rights base on the constitutional case-law of Peru and Chile.’ (2019) 46(1) Revista Chilena De Derecho 177
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Book

Rios Carrillo P, El razonamiento jurídico consecuencialista Un estudio sobre la teoría del razonamiento jurídico de Neil MacCormick (Palestra Editores 2021)
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Chapter

Rios Carrillo P, ‘Hard Cases in Law’ in L Duarte d’Almeida and others (eds.), Research Handbook on Legal Argumentation (Edward Elgar Publishing 2025)
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Review

Carrillo P and Rios Carrillo P, ‘Reseña del libro "José Chávez-Fernández Postigo, Luis Recaséns y la Teoría estándar de la argumentación jurídica. Una revalorización del logos de lo razonable, Pamplona, Thomson Reuters, 2017 (368 pp.)’ (2018) 27(1) Díkaion 134
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Research Interests

Jurisprudence, legal reasoning, constitutional law, public international law, roman law

Research projects & programmes

Jurisprudence in Oxford Research Group Roman Law