PHNOM PENH (The Phnom Penh Post/Asia News Network): Officials and researchers on June 29 threw their full support behind a master plan to transform the coastal Preah Sihanouk province into a Model Multi-Purpose Special Economic Zone (SEZ) after a new study found that the positives outweighed the negatives in terms of the impact of Sihanoukville’s urban development and socio-economic changes on national economic development.