Isik, E.; Ozyilmaz, A.; Bayraktar, Y.; Toprak, M.; Olgun, M. F.; Keyifli Senturk, N. Assessing the Impact of Multimodal Transportation on Economic Growth: A Machine Learning and Cointegration Approach in 28 Countries: Assessing the Impact of Multimodal Transportation on Economic Growth. EJTIR 2025, 25, 178-207.