Note—Developing a Global Diversification Measure

Previous measures, focusing on either the international market or product dimension of corporate diversification, have been unsatisfactory for analyzing global diversification since both dimensions constitute important elements of a firm's global diversification strategy. This study constructs a measure in which both dimensions can be captured, allowing business strategy researchers to examine corporate diversification in the global context. In accomplishing this task, this study extends the Jacquemin-Berry entropy diversification measure to the global horizon.