We focus on the relationship between age and diversification patterns of German machine tool manufacturers in the post-war era. We distinguish between ‘minor diversification’ (adding a new product variation within a familiar submarket) and ‘major diversification’ (expanding the product...

Investigating the role of diversification in the firm growth process, we build on Penrose’s (The theory of the growth of the firm. Oxford University Press, Oxford, <CitationRef CitationID="CR30">1959</CitationRef>) Theory of the Growth of the Firm to formulate hypotheses about growth of employment, assets and sales in the years before,...</citationref>