Using household travel diary data collected in Germany between 1997 and 2012, we employ an instrumental variable (IV) approach to estimate fuel price and effi ciency elasticities. The aim is to gauge the relative impacts of fuel economy standards and fuel taxes on distance traveled. We fi nd that the magnitudes of the elasticity estimates are statistically indistinguishable: higher fuel prices ...

At the beginning of section 2, there is a conflation of different concepts of possibility. If we grant that imaginability is conceivability (in the sense of being describable without any logical contradictions), if we pass over “practical” possibility as a non-defined term, and grant that by “physically” possible Zahavi very likely means “nomologically” possible, it still would present a major ...

In this paper we estimate the treatment effects wildfire suppression (fire crew response time) and fuel management (prescribed fire) have on wildfire size and intensity. Since wildfire management (suppression and fuel management) is likely endogenous to wildfire behavior, we develop instrumental variables (IV) and propensity score matching (PSM) methods to provide consistent estimations of the ...

The possibility of implementing fuel cell technology in Unmanned Aerial Vehicle (UAV) propulsion systems is considered. Potential advantages of the Proton Exchange Membrane or Polymer Electrolyte Membrane (PEMFC) and Direct Methanol Fuel Cells (DMFC), their fuels (hydrogen and methanol), and their storage systems are revised from technical and environmental standpoints. Some operating commercia...

Gas turbines are being utilized in a variety of applications (electric power production, jet engines, etc.) Modern power turbines have the highest operating efficiencies and turn out the fewest pollutants among major combustion energy converting devices. The power generation industry is faced with increasingly stringent emissions requirements for ozone precursors, such as nitrogen oxides and ca...