In a similar vein, Kreyer (2003) investigates corpus data which also allow for a possible alternation between genitive and ofconstruction (e.g., the chairman of the committee and the committee's chairman) and shows that processability and degree of human involvement are two crucial factors influencing speakers' selection of the constructions.
ofconstruction is more likely to be selected when the second noun phrase is pre-modified (e.g., the son of the Royal Bucks secretary) and when the semantic relationship between the two noun phrases is more objective, attributive and partitive.