“…Next, concerning product diversification measurement, certain scholars (Pandya & Rao, 1998;Tan, Chang, & Lee, 2007) measured this strategy using Rumelt's (1974) diversification classes, while others depended on using continuous measures such as Diversification Entropy Measure (David, O'Brien, Yoshikawa, & Delios, 2010;Singh, Mathur, Gleason, & Etebari, 2001) or Herfindahl Index (Çolak, 2010;Fukui & Ushijima, 2006). The use of different measurement methodologies for geographic diversification such as foreign sales ratio (Capar & Kotabe, 2003;Geringer, Beamish, & daCosta, 1989), geographic entropy measure (Hitt et al, 1997), along with many others have also been frequently observed in the history of literature on the field.…”