Siraj U.

Econometrics and statistical analysis expert in Stata, R, and SPSS. I help PhD researchers, economists, healthcare teams, and businesses run the right model, check its assumptions, and turn the output into clear, publication-ready results. 5+ years and 50+ Upwork projects in econometrics, panel data, time series, and applied statistics for dissertations, journal papers, policy work, and business decisions. ECONOMETRICS IN STATA & R - Panel data: fixed/random effects, Hausman test, clustered and robust SEs - Dynamic panels: System and Difference GMM (xtabond2), Arellano-Bond - Causal inference: DiD, event study, IV/2SLS, propensity score matching, RDD - Time series: ARIMA, VAR/VECM, ARDL, cointegration, unit root tests, GARCH - Spatial econometrics: Spatial Durbin, SAR and SEM models - Finance and ESG panel regressions (Refinitiv/LSEG, Compustat, World Bank data) STATISTICAL ANALYSIS - Regression: OLS, logistic, Poisson, negative binomial, polynomial - Hypothesis testing, ANOVA/ANCOVA, non-parametric tests - Factor analysis, PCA, SEM, reliability and validity - Survey data analysis and research methodology - Biostatistics: survival analysis, Cox regression, mixed/multilevel models WHAT YOU GET - Clean, documented Stata do-files or R scripts you can re-run - Diagnostic checks (heteroskedasticity, autocorrelation, multicollinearity, endogeneity) - APA/journal-style tables and charts - A plain-English write-up of what the results mean, ready for your chapter or report - Revisions until the analysis answers your research question HOW I WORK 1. You share your research question, data, and any guidelines. 2. I confirm the right method and timeline before starting. 3. I deliver results, code, and interpretation, and walk you through them. Not sure which model fits your data? Book a 30-minute consultation or send me a message with your research question. I usually reply within a few hours.