"The estimated 2017-18 net spend of £755 million (NZ$1.49b) represents 17 per cent of forecast 2017-18 Premier League revenue, in line with the average over the 15 years since the first transfer window in January 2003."
The January window also saw the total expenditure by the 'big six' - Manchester City, Manchester United, Chelsea, Liverpool. Tottenham Hotspur and Arsenal - come to £265 million (NZ$511m), representing 62 per cent of total gross spending.
This contrasted with last season's trend where half of gross expenditure came from the bottom-six clubs in a bid to retain their Premier League status.
"Such is the level of competition for a coveted top-four position in the Premier League, as well as ongoing European battles, that top clubs have been willing to break with more traditional summer investment strategies to steal a march on their rivals mid-season," Jones said.