Jordan's King Abdullah II has appointed a new prime minister, the royal palace said, naming a leading reformer as head of government in the hope of quelling the largest anti-government protests in recent years.
Cabinet member Omar Razzaz, a Harvard-educated former senior World Bank official, replaced Hani Mulki, who quit on Monday amid widening protests against his government's austerity programme, including a planned tax increase.
Mr Razzaz served as education minister in the outgoing Mulki government.
The king retains final say on all policy issues, and presumably would also define the parameters of any economic and political reforms sought by Mr Razzaz.
In the appointment letter addressed to Mr Razzaz, the monarch called on the new government to conduct a comprehensive review of the tax system and produce a new tax bill, in co-operation with parliament, unions and other groups.
He also expressed empathy for ordinary Jordanians who have long complained that they are being asked to pay taxes for poor services.
Critics say the current tax proposal unfairly targets the poor and the middle class.
It is not clear if the appointment of Mr Razzaz will defuse the growing public anger over a political and economic system widely perceived as corrupt and exclusionary, with benefits reserved for small elites.
Jordanian analyst Helmi Asmar said that it remains to be seen if Mr Razzaz will receive a reform mandate.
"Is he the one to run the country, or the old machine and the old system?" he asked.
"We hope for the good, but until now we haven't seen enough signs to be optimistic," said Asmar, who writes for the Ad Dustour newspaper.
Protest organisers said they would keep up the pressure, including a one-day strike set for Wednesday, until the tax proposal has been shelved.
The embattled Mr Mulki, who had led the push for the unpopular austerity measures, resigned following several days of mass protests across Jordan against the tax plan, the latest in a series of economic reforms sought by the International Monetary Fund to get the rising public debt under control.
The kingdom has experienced an economic downturn in part because of prolonged conflict in neighbouring Syria and Iraq, and a large influx of refugees in recent years.
The official unemployment rate has risen above 18%, and it is believed to be double that among young Jordanians.
In a sign of continued unrest, protests continued even after Mr Mulki's resignation.
Several thousand Jordanians marched towards the prime minister's office in the night from Monday to Tuesday.
Riot police scuffled with some of the marchers, trying to keep them away from the building, but the fifth street protest in as many days was largely peaceful.
Protesters said personnel changes at the top are irrelevant without fundamental reforms.
Mr Razzaz holds a doctorate in planning and a postgraduate degree in law from Harvard.
He taught at the Massachusetts Institute of Technology from 2002 to 2006.
From 2006-2010, he served as the World Bank's country manager in Lebanon, with emphasis on private sector development and infrastructure finance.
Mr Razzaz then returned to Jordan to head the Social Security Corporation, and from 2011-12 led the national team responsible for preparing a national employment strategy.