The index has been developed using data from existing quarterly indices of output from the production, services and construction sectors combined with agricultural output data and employee jobs data for the public sector.

BBC: New figures measure NI's output for first time

The department said the new index has been been developed using data from existing quarterly indices of the production, services and construction industries.

BBC: Unemployment: Mixed picture for NI jobless figures

The drug companies have argued that the concerns, raised by Dr. Eric Topol of the Cleveland Clinic and his colleagues, resulted from a misguided analysis of existing data, but the concerns have not fully lifted.

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