Rifaldi, R., Welsa, H. and Dwi Cahyani, P. 2026. The Effect of Online Reviews and Risk Perception on Trust and Its Impact on Consumer Purchase Decisions on Marketplaces (Shopee, Tokopedia, Lazada, and Blibli). Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE). 9, 2 (Jul. 2026), 16909-16926. DOI:https://doi.org/10.31538/iijse.v9i2.10407.