Erratum.
Two books were inadvertently omitted from reference 12 of the article "Manufacturing innovation and American industrial competitiveness" by Stephen S. Cohen and John Zysman (4 Mar., p.1110): M. Piore and C. Sabel, The Second Industrial Divide: Passibilities for Prosperity (Basic, New York, 1984) and C. Sabel, Work and Politics: The Dison of Labor in Industry (Cambridge Univ. Press, New York, 1982).