Temporal Changes in Youth Subjective Well-Being in Nigeria, 2016–2021. Key contents: R scripts for data cleaning, descriptive analysis, survey-weighted modelling, and robustness checks. Cleaned dataset (4youth_happiness.rds) derived from IPUMS-harmonised MICS waves (Nigeria 2016 & 2021). Processed outputs including tables, figures, and model summaries. Highlights from the analysis: Significant decline in affective happiness among Nigerian youth (mean score 4.5 → 4.1; p < 0.001). Strengthening the negative association with state-level vulnerability (GVI) in 2021. Low between-state variation (ICC ≈ 3.3%). Reproduction instructions:See the README.md for full setup (R ≥ 4.4.1, required packages) and script execution order. Data sources: IPUMS MICS (register at https://mics.ipums.org/mics/). GDL (https://globaldatalab.org/)License: MITCitation suggestion:Kamaldeen Sunkanmi Abdulraheem (2026). Temporal Changes in Youth Subjective Well-Being in Nigeria, 2016–2021 [Code]. GitHub. https://github.com/olasuraheem/IPUM_SWB/releases/tag/v1.0 For questions or collaborations, open an issue or contact: olasuraheem@gmail.com