On March 26-27, 2026, the fourth edition of the workshop Empircal Macroeconomics took place at the University of Innsbruck under the theme “Business Cycles in Times of Fragmentation and Uncertainty,“ co-organized with the Liechtenstein Institute and Johannes Kepler University Linz. Bringing together researchers working with macro and micro data and state-of-the-art empirical methods, the workshop examined current business cycle dynamics and their implications for fiscal and monetary policy.