New generations of computers sometimes require software that is incompatible with previous generations, and some users who have no need for the improved computing power nevertheless may feel compelled to purchase the new technology because they need to remain compatible with the bulk of users who are at the frontier.
Pentti Hakkarainen: Economic outlook – still uncharted waters ahead Speech by Mr Pentti Hakkarainen, Deputy Governor of the Bank of Finland, at the NorwayFinland Trade Association, Helsinki, 11 April 2011. *  *  *  The world economy has been recovering from the deep financial and economic crisis.