Lambda Alpha International (LAI and all of its affiliated Chapters comprise an honorary, non-political professional society devoted to the advancement of land economics. LAI is composed of men and women involved in the fields of real estate, real estate development, real estate management, land use, urban planning, architecture, law, government, academia and all other professions that deal with use, study and economics of land — that is what is meant by land economics. Membership is by invitation only.