HR&A prepared all of the regional and local economic impact analyses needed to evaluate alternative Master Plan concepts for the future development of Los Angeles International Airport (LAX), for Los Angeles World Airports, as the plan evolved through two mayoral administrations over a nearly 10-year period. The scope of work included extensive econometric modeling, using REMI, of future base-line (pre-project) economic conditions and forecasts of conditions under alternative development scenarios. The analyses were included in the project's environmental EIS/EIR documentation, which received all local certifications and an FAA Record of Decision. HR&A also assisted senior LAWA management, City officials and other project team leaders to respond to questions from a wide range of elected officials and other local and regional leaders, and the general public, about the economic implications of the alternatives.