Reforms in or reforms of

The only exposure many Chinese have had to them in the past has been in the official media's carefully-posed pictures of exotically dressed tribal people attending the annual meeting of the National People's Congress in Beijing.

But the economic and social reforms of recent years have changed the whole context of ethnic relations, according to Peter Ferdinand, an East Asia specialist at Warwick University.


The reforms have included a major loosening of controls on people's movements, leading to the creation of a 200 million-strong army of migrant workers.

"The migrant worker issue means that what used to be a local issue has now become a national one," Dr Ferdinand said.




I would write economic and social reforms in recent years instead of economic and social reforms of recent years. What makes the difference my way of writing and the article?