Ahead of the Paris Olympics in July and August, French prosecutors are working on four enquiries into possible wrongdoing, but are the investigations a sign of problems or of genuine efforts to tackle graft?

Andy Spalding, an academic and author who studies corruption in sporting "mega-events" such as the Olympics or the football World Cup, believes French authorities are showing they are serious about delivering a clean Games.

Three preliminary investigations are into possible favouritism in the awarding of around 20 contracts worth tens of millions of euros, while a fourth -- revealed on February 6 by AFP -- is scrutinising the pay of chief organiser Tony Estanguet.

In an interview with AFP, Spalding, a professor at the US-based University of Richmond School of Law, explained the troubled history of Olympic corruption and why he believes the Paris Games might spell the start of a "new era" of cleaner international sport.

"The Salt Lake City Winter Olympics in 2002 was the first time in which there was hard evidence of corruption that went public. Pre-2002, we know there's corruption. But we can't prove it and the world is largely resigned to corruption.

Then in the late 1990s, there's something sometimes called the "corruption eruption" -- a period of time in which all of a sudden the world starts paying a lot of attention to corruption issues.

There are new international conventions; there's an explosion of scholarship. There are scandals and resignations, new enforcement initiatives.

What we saw in the ensuing Games was not just incidents of corruption, but systemic corruption. Russia with the Sochi 2014 Winter Olympics was probably the most egregious example of this, where billions of dollars are estimated to have been embezzled in the course of the event."

"The corruption scandals have damaged the International Olympic Committee brand enormously. That was most obvious in 2015 at the time of the awarding of the 2022 Winter Games, when the only credible candidate, China, was a country that had almost no winter sports tradition.

Other countries just didn't want them because of the systemic corruption and the cost overruns.

The IOC needs a sustainable business model, so they adopted reforms, attacking the two different components of corruption: one is the corruption at the IOC level, particularly with the executive committee, meaning they needed to reform the bidding process.

Then the second step was addressing corruption at the host level: the organising committee, the municipality, the National Olympic Committee."

"France is the first country to be under an enforceable contractual obligation to adopt anti-corruption compliance programs. Nobody knows what it means yet, but starting with Paris, moving forward to the 2026 Winter Games and Los Angeles in 2028, we will have these contractual obligations each time.

You start with a contractual provision. The next step is to provide some guidance on what that means. Then we need operations and some enforcement for breach of contract. When all of those steps are completed, then the clause will mean something.

When any convention or statute is adopted, there is a lag before enforcement. The statute that was the catalyst for global anti-corruption enforcement, the US Foreign Corrupt Practices Act, was on the books for 25 years before we did anything with it."

"It's really important to note that France was awarded the Olympics in 2017, the same year that it adopted a new highly innovative anti-corruption law, Sapin II. That created a freestanding requirement that companies adopt anti-corruption compliance programs to prevent things like bribery, favouritism or extortion. In most of the world, anti-corruption compliance is not legally required.

France applied all this to the Olympics. They put the organising committee under the jurisdiction of the new French Anti-Corruption Agency (AFA) whose sole purpose is to help companies build compliance programs.

And in reviewing the organising committee, AFA has uncovered issues that are potential red flags. It sends those red flags to prosecutors, and prosecutors are now investigating.

What is that evidence of? Systemic corruption or an innovative anti-corruption initiative working really well? It depends on whether anything is verified. And if it's verified, how serious it is.

I think Paris could mark the beginning of a new era of anti-corruption law enforcement and anti-corruption measures in the Games."