As Singapore welcomes the return of the Formula One Grand Prix from Friday to Sunday, with road closures downtown and shopping centres brimming with fans hoping to catch a glimpse of their favourite drivers, the high-octane buzz is once again in full swing.Now in its 16th year, F1’s inaugural night race has become one of the city state’s flagship international events. But with each edition costing more than S$100 million (US$78 million), the economic payoff is increasingly being viewed through...