Hi, I'm Sergio. Analytics professional based in Madrid, working at the intersection of statistical rigor and business decision-making.
- Madrid, Spain
- in/sergio-halbert-viyella
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carbon-pricing-economic-impact
carbon-pricing-economic-impact PublicCountry-panel analysis (1990–2024) of carbon pricing's economic effects — emissions trends, price adoption, and a difference-in-differences estimate of carbon tax/ETS impact on GDP growth, inflatio…
Jupyter Notebook
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spotify-segmentation-thesis
spotify-segmentation-thesis PublicConsumer segmentation analysis of Spotify usage (n=330) — hierarchical & k-means clustering, hypothesis testing, and cluster profiling to identify distinct user segments.
Jupyter Notebook
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