We construct our business portfolio based on the survival of the fittest principle by, for example, withdrawing from a business that has lost its competitive edge. The present two business areas for portfolio management are Life Care and Information Technology. The HOYA Management System Based on ...
The results in bold with no star or cross above lost their significance after we considered for robust standard error. (Source: Authors calculations.). Sustainability 2018, 10, 3141 14 of 23 Another interpretation of this result may be relative to the period since the company started to ...