Pablo Cabrera Álvarez

Survey methods, polls, and data wrangling

I am a PhD candidate at the University of Salamanca (Spain). I research in the field of survey methodology with a special focus on non-probability sampling and how to correct selection and non-response bias. Sometimes I write about polls, public opinion, and elections.

Previously, I worked as a Survey Statistician designing survey samples and weights. I hold a master’s in Survey Methods from the University of Essex.


  • PhD in Social Science
    University of Salamanca

  • MSc Survey Methods for Social Research
    University of Essex

  • BA Politics & Sociology
    Complutense University of Madrid


  • Longitudinal surveys
  • Panel attrition
  • Inference with non-probability samples
  • Survey non-response and coverage bias
  • Opinion polls
  • Administrative data
  • Rstats

Latest Publications

Abad, D. D., & Cabrera-Álvarez, P. (2020). Bilingual Autonomous Communities, identities and educational achievement according to PISA 2015. Revista de Educación, 387, 163-188.

Cabrera-Álvarez, P., & Escobar, M. (2019). The Effect of Weighting and Multiple Imputation on Bias in Spanish Election Polls. Revista Española de Investigaciones Sociológicas, 165, 45-64.

For a full list of publications check out my CV .