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The University of Southampton
Economic, Social and Political Sciences Postgraduate study

Mr John-Jairo  Loja Bsc in Economics, Bsc Sociology, MSc Demography

Postgraduate Researcher (PGR)

Mr John-Jairo  Loja's photo

John-Jairo Loja is a doctoral researcher at the University of Southampton, department of Social Statistics and Demography.

His research focuses on mortality differences among Indigenous, Afro-descendant, and White-Mestizo groups in Latin American countries, particularly in Colombia. He is particularly interested in understanding mortality patterns, causes of death, and mortality under-registration in ethnic populations.

He holds a BSc. in Economics and a BSc in Sociology, both from the Universidad del Valle , Colombia, and an MSc in Demography from the Universität Rostock , Germany. He has been Visiting Research Fellow at a number of research centres and institutes, including the Max Planck Institute for Foreign and International Criminal Law in Freiburg im Breisgau, Germany.


Alongside his doctoral studies, John is currently co-investigator in a racial-ethnic study about “Social Inequalities in the Colombian ethnic population” at the Universidad del Valle (2021), and has contributed to two country-wide initiatives based at the University of Southampton: data analysis at the National Centre for Research Methods (NCRM-UK), and a mortality study at the Center for Population Change (CPC-UK).

John is keen to share his knowledge and train the next generation in his role as educator and is thus Teaching Assistant in Research Methods, Demography I and II at the University of Southampton. He also contributes more widely to the discipline with services such as reviewing for the Latin American Demography journal Revista Latinoamericana de Población (RELAP).

In his free time, he is enthusiastic about Latin American dance styles, and hopes to contribute more with this aspect of the Latin culture to the broader Southampton community of music lovers

Research interests

Mortality, Ethnic Population, Under-registration in Mortality data, Demographic and Machine Learning Methods, Racial Justice.

PhD research

Title: Ethnic mortality differences in Colombia between 1980-2007 and 2008-2015.

Research: This research contributes to a systematic understanding of trends, differentials and causes of mortality in Colombia for the period between 1980 and 2018, and how mortality patterns for Indigenous, Afro-descendants, and White-Mestizo groups, differ from general mortality trends in the country.

Supervisors: Sabu Padmadas ; Jason Hilton .

Funding: Economic & Social Research Council (ESRC) through the SCDTP .

PGR demonstrator at Master-Level modules:

  • DEMO6020 – Demography I
  • DEMO6022 – Demography II
  • RESM6004 – Quantitative Methods I
Mr John-Jairo Loja
Reception Building 58 University of Southampton Southampton SO17 1BJ United Kingdom
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