The debate over return-to-office usually runs as a binary. Either you believe in the office or you do not. But the most useful evidence treats the mandate as a dial rather than a switch, and the reading on that dial is unforgiving. As firms turn up the pressure to appear in person, they turn up the rate at which their most experienced people leave. The relationship is not linear rhetoric. It is a dose-response curve.
A dial, not a switch
Ding and Ma (2024) studied return-to-office mandates at Microsoft, SpaceX and Apple using distributional synthetic controls applied to a dataset of 260 million résumés. Their central finding is a causal one: these mandates caused a disproportionate departure of senior employees, threatening the firms' capacity for productivity and innovation. It is a working paper and not yet peer-reviewed, so it should be cited with that caveat, but the identification strategy is careful and the result is the strongest available on the question.
What lifts the study above a single number is the gradient. The size of the senior exodus scaled with the strictness of the policy. Apple, requiring roughly one day a week in person, saw seniority displacement below 4 percent. Microsoft, at about half-time presence, saw more than 4 percent. SpaceX, demanding full-time attendance, saw the largest shift of all. Same broad policy, three different intensities, three different levels of damage. The harder the squeeze, the more the veterans slipped out.
The Microsoft case gives the mechanism a face. After the April 2022 mandate, average tenure in the top deciles fell by around two months, a shift a permutation test placed at p equals 0.03, while the mass of employees with zero to three years of service rose by about 6 percent. The office did not empty. It rejuvenated in the worst sense, trading experience for newcomers.
The gradient is the part worth dwelling on, because it converts a moral debate into an engineering one. If mandates simply worked or failed, a leader could pick a side and move on. But a dose-response relationship says the outcome is a function of a setting the leader controls. Turn the dial a little, lose a little seniority. Turn it hard, lose a lot. That reframes every mandate as a quantity question rather than a yes-or-no one, and it means the common instinct to go all in, to demand full presence so nobody doubts the firm's resolve, is precisely the choice that maximizes the damage.
Why rigidity selects for the people you keep last
The direction of the sorting is not random, and it is the opposite of what a firm would choose. Senior employees have the most options, the deepest external networks, and often the heaviest personal reasons to resist a rigid schedule. When presence becomes non-negotiable, they are the ones best positioned to say no by leaving. Juniors, with less leverage and more to prove, stay and comply. A strict mandate therefore acts as a filter that retains the least experienced and expels the most.
This is worse than ordinary turnover, because it is selective in exactly the wrong direction. Random attrition costs a firm an average employee. A rigidity-driven exodus costs it above-average ones, chosen by the policy for their seniority. A leader who imagines a mandate as a loyalty test, weeding out the uncommitted, has the selection backwards. The test does not screen for commitment. It screens for who has the standing to walk, and rewards the firm by keeping whoever could not.
Lee and Edmondson (2017) help explain why this hurts more than a headcount chart suggests. Managerial hierarchy, they note, handles the reliable execution of known tasks but inhibits complex, non-routine problem solving across functions, and tends toward rigidity. Senior people are disproportionately the ones who carry the tacit knowledge and cross-boundary judgment that such problem solving depends on. Losing them does not just shrink the team. It removes the part of the organization least replaceable by a new hire following a runbook. A rigid mandate, in the name of order, strips out the capability that copes with disorder.
The practical read
The policy lesson is that rigidity is not a free variable to be maxed out for the sake of appearing serious. It is the very parameter that governs how much senior talent walks. A leader who frames the choice as office versus no office is asking the wrong question. The operative question is how much presence, imposed how hard, against a workforce whose most valuable members have the most freedom to refuse.
The wider climate raises the stakes. Gallup (2025) reports global engagement at 20 percent, its lowest since 2020, and finds manager engagement in particular falling sharply. Turning the presence dial to maximum inside an already disengaged workforce is not a show of resolve. It is a way to accelerate the loss of exactly the people who hold institutional memory together.
If a firm concludes it genuinely needs time in the building, the evidence argues for the lightest touch that achieves the real goal. Target the days and the teams where colocation earns its cost, and leave the rest to discretion. The alternative, cranking the mandate to full intensity, buys a fuller floor at the price of a hollower bench. Ding and Ma's curve is a warning written in departures: past a point, every additional degree of rigidity is paid for in the résumés of the people you most needed to keep.
Sources
- Ding and Ma (2024). Return-to-Office Mandates and Brain Drain. Causal, dose-response evidence that stricter mandates (Apple to Microsoft to SpaceX) produce progressively larger senior departures, with Microsoft's top-decile tenure falling about two months. https://arxiv.org/pdf/2405.04352
- Lee and Edmondson (2017). Self-managing organizations: Exploring the limits of less-hierarchical organizing. Hierarchy inhibits non-routine, cross-boundary problem solving, the capability senior leavers disproportionately embody. https://www.sciencedirect.com/science/article/abs/pii/S0191308517300059
- Gallup (2025). State of the Global Workplace 2025. Engagement at a post-2020 low of 20%, and falling manager engagement, raise the cost of maximizing presence in an already disengaged workforce. https://www.gallup.com/workplace/659610/state-global-workplace.aspx