In an NBER working paper, Jose Maria Barrero, Nicholas Bloom, and Steven J. Davis argue, based on a survey of 30 000 Americans, that

… 20 percent of full workdays will be supplied from home after the pandemic ends, compared with just 5 percent before. … better-than-expected WFH experiences, new investments in physical and human capital that enable WFH, greatly diminished stigma associated with WFH, lingering concerns about crowds and contagion risks, and a pandemic-driven surge in technological innovations that support WFH.

They predict:

First, employees will enjoy large benefits from greater remote work, especially those with higher earnings. Second, the shift to WFH will directly reduce spending in major city centers by at least 5-10 percent relative to the pre-pandemic situation. Third, … a 5 percent productivity boost in the post-pandemic economy due to re-optimized working arrangements. Only one-fifth of this productivity gain will show up in conventional productivity measures, because they do not capture the time savings from less commuting.