The document discusses trends in the North American airline industry and forecasts for 2015. It finds that while demand is growing, airline capacity growth has been limited, leading to rising airfares, particularly on routes where competition has been reduced. It also discusses how consolidation among major US airlines into three carriers is impacting corporate travel deals, making negotiations more complex and potentially requiring travel buyers to reduce the number of airlines in their programs. Overall, fares are expected to continue rising faster than inflation in 2015 in North America due to supply constraints, though carriers will be cautious not to raise prices too sharply and risk damaging demand.