Research related to fundamental issues of statistical inference of non linear parameters from complex sample surveys involving unequal probabilities, repeated surveys, non-response; imputation and adaptive sampling. These issues include: jackknife variance estimation and confidence intervals.

Empirical likelihood inference under complex sampling

Quality assessment of complex parameters

Modelling survey data under complex sampling

Estimating equations and generalised estimating equations

Measurement of change and trend for longitudinal surveys

Variance of change for rotating panel surveys

Variance estimation and confidence interval of measure of poverty based on EU-SILC

Jackknife variance estimation

Non-response and imputation for survey data