ABSTRACT
This chapter reviews the research about demand forecasting, and focuses on the general demand and classifies these studies by the forecasting time horizons. It provides air travel demand forecasting research and the forecasting methods for various air travel demand categories and discusses a framework of air travel demand determinants. According to geographical scope, air travel demand can mainly be grouped as: air travel demand of O-D pairs, air travel demand of an airport and nationwide air travel demand in the literature. In the literature, demand forecasting research is usually classified by the forecasting time horizons, that are the short term, the medium term and the long term. The chapter focuses on the two typical fields in demand forecasting literature to serve as representatives, including electricity demand and tourism demand. M. Kappler provided a simple review of methods for potential output estimation and medium-term economic forecasting. These methods classified that univariate statistical filters, multivariate time series models and production function approaches.
