A new study by Evan Ringquist, professor in the Indiana University School of Public and Environmental Affairs, finds the problem hasn't materialized -- that the efficiency gains of allowance trading have not come at the expense of equitable treatment of minorities and the poor.
"There is very little evidence that allowance trading causes 'hot spots,'" Ringquist said. "This study finds there is no inherent trade-off between efficiency and equity when using market-based instruments for pollution control."
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