Dajčman, Silvo, and Dejan Romih. “Time-Varying Granger Causality Between Health Care and Economic Activity in the United States”. LeXonomica 17, no. 2 (December 19, 2025): 121–142. Accessed January 9, 2026. https://journals.um.si/index.php/lexonomica/article/view/5726.