File photograph of a worker  controlling  a blast furnace at Europe’s largest steel factory  in the western German city of Duisburg. Germany’s economy crept back into growth in the first quarter of the year after a sharp contraction at the end of 2012. Photograph: Ina Fassbender/Reuters.

The German economy returned to growth in the first quarter but limp construction activity and investment brought about by a severe winter and a(...)