The pandemic has unleashed a historic burst in entrepreneurship and self-employment. Hundreds of thousands of Americans are striking out on their own as consultants, retailers and small-business owners.

The move helps explain the ongoing shake-up in the world of work, with more people looking for flexibility, anxious about covid exposure, upset about vaccine mandates or simply disenchanted with pre-pandemic office life. It is also aggravating labor shortages in some industries and adding pressure on companies to revamp their employment policies.