There is very little reliable data in the public domain on the past Olympic Games in Athens , Turin  and Beijing  and thus for Vancouver and London, the IOC introduced the Olympic Games Impact study, an independently compiled report on the impact of hosting the event.
The OGI study for London 2012 is being compiled by the University of East London, which produced a pre-games report in November 2010.
Indeed London 2012 looks set to become one of the most analysed games on record, with the UK government’s Department of Culture, Media and Sport having commissioned Grant Thornton to undertake an independent study into the perceived benefits the games will have on the UK economy.
The World Cup is already well-versed in analysis, with data for the 2006 and 2010 tournaments provided through the Fifa Marketing Report and an independent study, also conducted by Grant Thornton.
While the Olympic Games and World Cup battle it out for supremacy, what of the other major sporting events? - the Rugby World Cup, the World Athletics Championships and soccer’s European Championships, to name a few. Where do they sit at sport’s top table?
The problem of comparing data from all these sporting events is that the figures are captured and calculated using different methodologies. There is no consistency in the way studies are conducted, making it extremely difficult to compare events using secondary data.
Sportcal has been working for the last year with a group of 200 leading industry experts, supported by UK Sport, the UK administration and funding body, and Singapore Sports Council, the body closely involved in the growth of the country as a sports destination, to try to establish a standard methodology for measuring the impact of major sporting events.
The outcome – the Global Sports Impact project – is investigating the possibility of creating a standard set of data indicators that will enable events to be studied across a range of different sports.