BOURZIK, DOUNIA, AZIZ LMAKRI, AMAL MELLOUK, and ABDELHADI AKHARIF. “Efficient Test for Threshold Regression Models in Short Panel Data”. Statistics, Optimization & Information Computing 15, no. 3 (December 15, 2025): 1611-1631. Accessed March 3, 2026. http://iapress.org/index.php/soic/article/view/3091.