The push to end a four-decade limit on exporting U.S. oil may get a boost from a government study set for release as soon as today that will explain the relationship between crude oil and domestic gasoline prices. Supporters of lifting the ban anticipate the Energy Information Administration analysis will affirm what they suspect: that overseas sales won’t raise the price Americans pay at the pump because the price of gasoline is tied to the global oil supply. While some recent studies have reached a similar conclusion, the analysis from the non-partisan EIA could make a stronger impression with lawmakers. “We don’t have to prove gas prices are going to go down,” Robert Dillon, a spokesman for Senator Lisa Murkowski , an Alaska Republican, said in an interview. “We just have to prove they aren’t going to go up.” The EIA analysis is being released at a crucial time. […]