Harahap, E. S., Silaban, A., Sitanggang, D. R., & Tarigan, M. C. F. (2026). Analysis of Market Failure in Karo Regency: A Study of Karo Tomato Farmers. J-CEKI : Jurnal Cendekia Ilmiah, 5(4), 824–835. https://doi.org/10.56799/j-ceki.v5i4.16556