Maciej Jan S.

PhD researcher with 10+ years of experience in quantitative research, survey analysis, statistical modeling, and data management. I help clients with: • Survey data analysis • Statistical modeling (linear, logistic, multinomial, and panel data models) • Questionnaire design and survey methodology • Data cleaning and data management • R and Stata programming • Research design and causal inference • Research reports and data interpretation • Academic writing Tools: R | Stata | Python | SPSS | Survey Research | Experimental Design | Machine Learning Whether you need support with survey research, statistical analysis, academic research, policy evaluation, or data-driven reports, I can help turn complex datasets into actionable insights.