These improvements are largely due to net savings from continued productivity to a workforce mix and a reduction in discretionary expenses, including those related to travel, office, and professional services.

Mar 30, 2021 / CFO / receipt, needs a key / Helen Shan, CFO | earnings call 2021-03-30 | transcript baeb19d3-087a-4973-8dc5-4ac0146f86a1 | chars 10146-10355 | segment 10

The primary drivers include materially lower travel and entertainment costs and reduced spend due to office closures offset in part by higher compensation costs.

Mar 30, 2021 / CFO / receipt, needs a key / Helen Shan, CFO | earnings call 2021-03-30 | transcript baeb19d3-087a-4973-8dc5-4ac0146f86a1 | chars 10969-11130 | segment 11