Finland’s UPM set out to solve a mystery — find and fix unexplained gaps in pay among its roughly 17,000 employees spread across the 46 countries where the forestry giant operates. The multinational producer of biochemicals, biofuels, fibre, pulp, paper and wood products turned up 400 cases of workers with unexplained gender gaps in their pay in its debut equity review in 2021. That was 2.3 per cent of its workers in 10 countries. Their pay was adjusted at the start of 2022.