The quarterly corporate business climate survey of Institute for Economic and Enterprise Research (IEER) is based on the opinions of 400 chief executives about the current state and outlook of their businesses. From the companies surveyed, 300 small and medium-sized enterprises (with 20-249 employees) were selected to calculate the Comprehensive SME Business Climate Index and the Comprehensive SME Uncertainty Index. For the greater sample of 400, including large enterprises employing over 249 people, a Quarterly Business Climate Index and a Quarterly Uncertainty Index were calculated.