Adidas, as the official sponsor of Germany and its contender Argentina, had a head start going into Sunday's duel as "the most visible brand" in the final, Chief Executive Officer Herbert Hainer said in a statement last week.
'Positive effect'
The match ended 1-0 in Germany's favour, crowning Joachim Loew's eight-year reign as the national coach. Substitute Mario Goetze scored in the 113th minute, allowing the Germans to avoid a penalty shootout.
"Psychologically it has a positive effect on self-confidence," said Boellhoff. "While you can't calculate this in detail, it can have a positive influence on work motivation and confidence in producing quality."
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World Cup victories have coincided with periods of economic prosperity in Germany in the past. The 1954 defeat of Hungary in Bern marked the start of the country's postwar political and economic recovery, boosting the morale of a defeated nation.
The 1974 winner's medal came at the dawn of another economic resurgence, and the year before Germany became one of the founding nations of the Group of Six industrialised countries, which was subsequently extended to include Canada and Russia.
Berlin Wall
The 1990 final in Rome, also against Argentina, came eight months after the Berlin Wall came down.
"It's true that in the three years after 1990, the German economy grew very strongly, but the reason was reunification," said Boellhoff, referring to the merger of East and West Germany on October 3, 1990. "We have to differentiate between causality and correlation."
Sunday night's victory marks the first for a united Germany. No country has made it to more World Cup finals - eight - although Brazil holds the record for titles, with five to Germany's four.
Regardless of the sporting success, the German economy is heading toward a period of renewed economic prosperity with the beckoning of the "golden 2020s," Boellhoff said, citing a new report on Germany published by Prognos last week.
Watch: World Cup Final: Germany 1 Argentina 0
Strong economy
"Germany is the only country of the largest economies in Europe that is in a really strong situation right now," he said. "This can improve even more when its neighbours gradually emerge from the crisis, and this will happen in the next few years."
German economic growth accelerated more than forecast in the first quarter, propelled by domestic demand and a construction boom. The Bundesbank, in June, raised its growth forecast for the economy, predicting gross domestic product will increase by 1.9 per cent this year, higher than the 1.7 per cent it predicted in May. It expects GDP to climb by 2 per cent in 2015.
"Over the years, we have generated our growth largely through industry and exports," Boellhoff said. "This is now feeding into people's incomes and that means private consumption is contributing more to growth than has been the case up to now. This will come to the fore in 2017 to 2018 and will continue until the end of the 2020s."
- Bloomberg