He uses a model that combines economic, financial and satellite data, as well as back-tests and outside models, Barraud told
Business Insider.
Barraud also factors in what the betting markets have said about the elections, valuing the ones that get the most action. Betting markets have been bullish on Trump for most of the year.
What would happen with the economy should Trump win and the Republicans take power over Congress?
Barraud has predicted a GDP boost anywhere from 2.1-2.3% in 2025 after Trump implements tax cuts.
He does worry, however, about the ever-increasing US deficit and where it goes if Trump enacts tax cuts.
The economist's other forecasts include Trump winning, but a divided Congress, which would limit the president's power and force him to focus most of his time on foreign policy.
Tariffs - a huge part of the Trump economic plan - would be enacted sooner than many think, according to Barraud, hurting growth globally and potentially hurting the economy long term.
His third most likely scenario, a Harris victory and a divided Congress, would leave the economy in a status quo, with little expected to change.