The U.S. economy con­tracted at an annual rate of 2.1 per­cent in the first quarter, according to a revised gov­ern­ment cal­cu­la­tion, while the Mass­a­chu­setts economy shrank at a 0.3 per­cent rate over the same period, Mass­Bench­marks said Wednesday.

Revi­sions can sig­nif­i­cantly alter esti­mates of eco­nomic growth. In late April, for instance, the Com­merce Depart­ment said the nation’s economy con­tracted at just 0.1 per­cent, while Mass­Bench­marks found a 2.6 per­cent growth rate for Massachusetts.

The steep down­ward revi­sion in the esti­mate of Mass­a­chu­setts eco­nomic growth for the first quarter (orig­i­nally reported as pos­i­tive 2.6 per­cent) is pri­marily due to the cor­re­spond­ingly large down­ward revi­sion in U.S. eco­nomic growth in the first quarter, orig­i­nally reported as pos­i­tive 0.1 per­cent,” Alan Clayton-​​Matthews, a senior Mass­Bench­marks editor and a North­eastern Uni­ver­sity asso­ciate pro­fessor, said in the index release.

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