The study by Navigant Consulting estimates that the country will lose $28.2bn in cumulative economic activity through 2016 without the PTC in place.

The potential impact would be immediately felt as total wind-supported jobs would decline by nearly half from 78,000 to 41,000 in 2013, and total wind investment will fall by nearly two-thirds from $15.6bn in 2012 to $5.5bn.

Wind installations would average 2GW to 4GW annually through 2016 versus a projected 8GW in 2012, according to the study.

Should