One-hundred-and-two holes have been dug so far and 1, 100 measurements have been made of ice thickness, snow density and other features - data deemed vital by scientists evaluating the future of the Arctic sea-ice.

BBC: Arctic team gives up on ice radar

Saltsman also tells me that Card and Krueger responded to the critique by Neumark and Wascher, in a paper published in the same issue of The American Economic Review as the Neumark and Wascher paper, re-evaluating their own data and scrutinizing payroll data raised by other scholars.

FORBES: Obama Nominee Pulled Back on Minimum Wage Defense