The Globe and Mail reports in its Monday, Oct. 19, edition that corporate tax revenue has dropped significantly under President Donald Trump. A New York Times dispatch to The Globe reports that revenue from the corporate income tax fell roughly 15 per cent, to $381-billion, in the fiscal year that ended on Oct. 1 (all figures U.S.). Behind the decrease are the tax cuts that Republicans passed and Mr. Trump signed last year. That law lets companies claim larger deductions in the year they make new investments, a change made as many of the largest technology firms began pouring billions into artificial-intelligence projects. The cuts have reduced corporate tax revenue even more sharply than analysts projected Academic researchers found that the tax break, when previously in place, did help generate additional investment, which can help power the economy overall. That was before the competition to dominate AI technology unleashed hundreds of billions of dollars in spending on chips, data centres and the electrical systems that power them. Major companies such as Microsoft, Google and Meta appear so committed to sharply increasing their investment that the tax break may not be having much of an effect on their plans.