Econometric forecasts : tourism trends to 2000 / Egon Smeral, Stephen F. Witt, Christine A. Witt
Econometric forecasts of tourism demand to 2005 / Egon Smeral, Stephen F. Witt
Varying elasticities and forecasting performance / Egon Smeral, Haiyan Song
The decline of tourism income elasticities in a global context / Ulrich Gunter and Egon Smeral