Emma Mackay is a statistician specializing in Bayesian methods, causal inference, and evidence synthesis for medical research. She is a Senior Consultant at IQVIA in the US Evidence Synthesis group. Her recent work has focused on applying Bayesian borrowing methods to address the challenges of evaluating efficacy/effectiveness in rare disease settings. She has extensive experience in HEOR analytics with expertise in meta-analysis, survival modelling, external control arm methods, and population-adjusted indirect comparisons.