Hermawan, D., Pasaribu, F.R.H., Gustryan, M., Fathony, M. and Santiago, F. 2026. Legal Efficiency and Population Control: Analysis of Indonesia’s Family Planning Programme Based on Richard A. Posner’s Theory. JURNAL ILMIAH GEMA PERENCANA. 4, 3 (Jan. 2026), 2015–2032. DOI:https://doi.org/10.61860/jigp.v4i3.347.