Frontmatter -- Inhalt / Contents -- Guest Editorial -- Abhandlungen/Original Papers -- Product Diversification and Profitability in German Manufacturing Firms -- Is the Boone-Indicator Applicable? - Evidence from a Combined Data Set of German Manufacturing Enterprises -- Which Parameters Determine the Development of Farm Numbers in Germany? -- Energy Use Patterns in German Industry: Evidence from Plant-level Data -- Global Warming Induced Water-Cycle Changes and Industrial Production - A Scenario Analysis for the Upper Danube River Basin -- The Economic Consequences of One-third Co-determination in German Supervisory Boards -- Buchbesprechungen / Book Reviews