BRUSSELS—Global trade bottlenecks are more the result of demand spikes than supply chain snags, with pressure likely to ease in the coming months, the World Trade Organization’s chief economist said on Monday. The WTO had thought in October that demand for goods would slow early in 2022. However, that was before the Omicron variant of coronavirus led to curbs on activity, including the postponement of the WTO’s ministerial meeting. Chief economist Robert Koopman said consumers had then continued to skew spending towards goods rather than services given they could not or preferred not to dine out or go on holiday. Koopman said that for goods trade, excess demand likely explained two-thirds to three-quarters of apparent shortages. “It still remains that this compositional shift in demand supported by the appropriately aggressive, quick fiscal and monetary policies, has resulted in this outcome where lots of people write about supply-chain disruptions,” he told …