main index
P00: frame around
P01: olicognography
P03: infrastructures
wayout:contact
productmanagement
constructioncosts
elasticitiesformulas
cournotequilibrium
economicdownward
form/informmarket
communitybenefit
priceeffectdemand
costoptimization
conflictcooperation
demandaxioms
gov.bor.&privateinvest.
