Study concludes that automakers tweak vehicle fuel economy to qualify for more favorable treatment; focus on car notches
Green Car Congress
FEBRUARY 17, 2011
In response to federal policies to boost gas mileage, manufacturers have changed vehicle weights, improved tire-rolling resistance and added aerodynamic features to push fuel-economy rates past government-mandated thresholds. mpg and 22.4 mpg) that lead to large changes in tax liability or the amount of a subsidy. —Joel Slemrod.
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