Arguments about remote work are conducted with great confidence on both sides. The research is genuinely mixed and the mixedness is informative.
Productivity
Studies have found effects in both directions, and the variation appears to depend on the work rather than on the arrangement.
Individual focused work generally shows neutral or positive effects, with reduced interruption cited consistently.
Collaborative and creative work shows more negative findings, particularly for tasks requiring rapid unstructured exchange.
Which suggests the question is badly framed — the useful question is which tasks suit which arrangement.
The measurement problem
Productivity is genuinely hard to measure for knowledge work.
Studies using output measures where they exist — support tickets, calls, lines of code, patents — are more credible than those using self-report or manager assessment, both of which carry known biases.
The much-cited early studies used call centre and data entry work, where output is countable, which limits how far they generalise.
Collaboration and networks
One of the more robust findings.
Analysis of communication patterns has found that fully remote arrangements tend to produce more siloed networks — stronger ties within existing groups, weaker ties across them.
Which matters because weak ties across groups are associated with information flow and innovation in a substantial organisational literature.
The effect appears to develop over time rather than immediately, which is consistent with existing relationships carrying arrangements initially.
New joiners
The group where negative effects are clearest.
People joining an organisation remotely build networks more slowly and receive less informal guidance.
Which affects early-career employees most, since they depend most on observation and incidental learning.
Structured onboarding, deliberate mentoring and periodic in-person time all address this and require effort that colocated arrangements provided automatically.
Hybrid
Where most organisations have landed, and the research is thinner because it is newer.
Findings generally suggest a few days in office captures most of the collaborative benefit while retaining focus time.
Coordination is the practical difficulty — the benefit depends on people being present simultaneously, which requires either mandated days or effective coordination.
Uncoordinated hybrid produces the worst outcome, where people commute to sit on video calls, which is widely reported and entirely avoidable.
Retention and preference
Surveys consistently find strong employee preference for flexibility, and studies have found that removing it increases turnover.
Which is a real cost that must be weighed against whatever collaboration benefits colocation provides.
Valuations of flexibility in wage-equivalent terms have been estimated in several studies at meaningful percentages of salary.
The unequal effects
Flexibility benefits are not distributed evenly.
Caring responsibilities, disability, commute length and home working conditions all vary, which means the same policy affects people very differently.
Research has also raised concerns about proximity bias, where colocated employees receive more advancement, which would systematically disadvantage those using flexibility.
Which is measurable and worth measuring, and most organisations do not.
What the evidence supports
Matching arrangement to task rather than applying one policy.
Investing deliberately in what colocation provided incidentally.
Coordinating in-office time so it achieves something.
And measuring outcomes rather than presence, which is the change most organisations have found hardest.
Asynchronous working
The practice that distinguishes organisations that made remote work well from those that reproduced office patterns over video.
Written communication, decisions recorded in accessible places, and reduced dependence on synchronous meetings.
Which is slower for any individual exchange and considerably more scalable across time zones.
It also produces documentation as a byproduct, which benefits people who join later.
The cost is that it requires writing well, which is a skill distributed unevenly and rarely developed deliberately.
Meetings
Video meeting volume increased substantially with remote work, and the fatigue reported is real and has been studied.
Proposed causes include sustained close eye contact, seeing oneself continuously, reduced mobility and increased cognitive load in interpreting limited nonverbal signals.
Interventions with some support include shorter default durations, camera-optional norms and audio-only calls taken while walking.
Monitoring
Surveillance software adoption increased alongside remote work, and evidence on its effects is generally unfavourable.
It measures activity rather than output, damages trust, and is associated with worse outcomes in the studies conducted.
Cost implications
Office cost reduction was an early motivation and has been partially realised.
Which is offset by home working allowances, equipment provision and the cost of periodic gatherings, all of which are real.
Tax treatment of home working expenses varies by jurisdiction and has changed in several since arrangements became permanent.
Legal and jurisdictional questions
Employees working from a different country create tax, employment law and social security obligations that catch employers unprepared.
Which is why many organisations permit remote work within a country and not across borders, and the restriction is administrative rather than cultural.
Permanent establishment risk, where an employee's presence creates a taxable presence for the employer, is the specific concern.
Which means the policy question and the tax question need answering together, and organisations that addressed only the first have discovered the second later.