In the US, the shale gas revolution ensured that the development costs of unconventional natural gas plummeted to the levels of 2–3/Mcf.Thissuccesshasmotivatedthedevelopmentofshalegasinotherregions,includingAustraliaandEurope.Thisstudy,focussingprimarilyonaspectsofeconomicimpactanalysis,estimatesthedevelopmentcostsofshalegasextractioninbothAustraliaandEurope,basedonbothdirectandfiscalcosts,andalsosuggestspolicyinitiatives.Theincreasingliquefiednaturalgas(LNG)developmentsinAustraliaarealreadystrainingdomesticgassupplies.Hence,thedevelopmentofmorenaturalgasresourceshasbeengivenahighpriority.However,amajorityoftheAustralianshaleresourcesisnon−marineinoriginandsignificantlydifferenttothemarine−typeshalesintheUS.Inaddition,thechallengesofhighdevelopmentcostsandthelackofinfrastructure,servicecapacityandeffectivegovernmentpolicyareinhibitingshalegasdevelopment.Increasingtheattractivenessoflowriskinvestmentbynew,local,developersiscriticalforAustralianshalegassuccess,whichwillsimultaneouslyincreasedomesticgassecurity.IntheEuropeancontext,unconventionalgasdevelopmentwillbechallengedbydirect,ratherthanfiscalcosts.Highdirectcostswilltranslateintoaverageoverallgasdevelopmentcostsover13/Mcf, which is well over the existing market price