Financial incentives, public-health messages and other tactics used by state and local governments and employers to encourage people to get the Covid-19 vaccine didn’t have a noticeable impact on vaccination rates among those who already were hesitant about getting the shot, new research shows.
What’s more, the strategies sometimes had the opposite effect of their intended design on certain groups of people, illustrating how difficult it has been to lift U.S. vaccination rates as the pandemic drags on, according to a recent study published in the National Bureau of Economic Research.