TUNIS — The Tunisian authorities are moving to defuse the anger that has driven protesters to the streets over the past week and led to hundreds of arrests.

As still more people gathered on Sunday to mark the seventh anniversary of the Tunisian revolution, a wave that set off the 2011 Arab Spring uprisings, the government said it was taking steps to ease the plight of the poor and the jobless. Among the measures: Government aid to needy families will be increased to $86 a month from $61, with about 120,000 families getting extra help, they said.

Government officials also said they would review the retirement disbursements for some people who are being underpaid because their employers did not declare their real salary. And they said they would extend health care to all Tunisians.

Early Sunday, President Beji Caid Essebsi went to a neighborhood in Tunis, the capital, to announce a new youth center.