Tiara Marthias focuses on researches and projects on inequality in reproductive health, maternal, neonatal and child health (RMNCH) using health systems perspective.

Her research interests include (1) health systems & policy analyses related to geographical inequity in RMNCH services utilization including policy development, evidence-based planning and budgeting, (2) econometric studies to decompose inequalities and inequities in health care utilization, (3) health financing analysis and evaluation of health fund channelling and prioritization and (4) evaluation methods particularly exploring the realist evaluation approach.
Tiara also has extensive experience working with Indonesian ministries and sub-national government offices to assist in health program planning and evaluation and collaborating with international health organizations.

Tiara is currently undertaking her PhD at The University of Melbourne. Her thesis explores health systems factors that drive geographical inequality in maternal health care utilization in Indonesia, using the Indonesian National Health Insurance program as the main context of the analysis.