NEW YORK--(BUSINESS WIRE)--The long term nature and lack of financial wiggle room inherent in availability-payment (A/P) based public private partnership (P3) projects could make them susceptible to cost increases during operations, according to Fitch Ratings in a new report. Long staples in Europe and Canada, A/P P3s are growing in the U.S. and emerging markets like Mexico. These projects primarily involve civil and social construction that is mostly proven and reliable, though the complexity