Gerard Hendrik Hofstede (born 3 October 1928, Haarlem) is an influential Dutch writer on the interactions between national cultures and organizational cultures, and is an author of several books including Culture's Consequences and Cultures and Organizations, Software of the Mind, co-authored by his son Gert Jan Hofstede.Hofstede's study demonstrated that there are national and regional cultural groupings that affect the behaviour of societies and organizations, and that are very persistent across time.