Forecasting annual European travel market from early data provided by ECM members Research shows that annual European tourist bednights can be accurately predicted by using monthly data. A recent study performed by ECM’s academic advisers, Prof. Karl Wöber and Dr. Irem Arsal (MODUL University Vienna),  shows that monthly data is a good indicator for forecasting annual tourist bednights.  In addition, annual forecasts are more accurate for the near rather than the distant future.