Image copyright Getty Images

Italians are choosing a new parliament on 4 March. Who is standing, what are they proposing and does the outcome matter? Here's a brief guide.

Italy has been run by a caretaker cabinet since December 2016, when Matteo Renzi resigned after staking his leadership on a referendum to overhaul the election and functioning of the houses of parliament.

New or old faces?

The search for a new prime minister involves some familiar names - and some very familiar faces, indeed.

Former Prime Minister Silvio Berlusconi, 81, is back and leading his centre-right Forza Italia (FI) with unbounded energy.

Video caption Berlusconi's handshake advice for BBC reporter

He has teamed up with Matteo Salvini, 44, of the right-wing, Eurosceptic Lega (League - formerly the Northern League).

On the centre-left is Mr Renzi, 43, leader of the Democratic Party (PD), and challenging both camps is the leader of the Five Star Movement (M5S) Luigi Di Maio, who, at 31, would be Europe's youngest prime minister if he prevailed.

What are they saying?

Migration : Like elsewhere in Europe, the arrival of migrants has spawned extremism, and even mainstream politicians have hardened their rhetoric.

Mr Berlusconi, for instance, has spoken of "a time bomb". He wants to deport some 600,000 illegal migrants. His coalition ally, Mr Salvini, is more than pleased. He told an election rally Italy was "a racist country".

The Five Star Movement wants changes to the so-called Dublin regulation under which refugees typically have to seek asylum in the first EU state they reach. And the PD wants to cut aid to countries that refuse to accept migrants.

Read more:

Image copyright EPA Image caption Migrants were targeted by an Italian gunman this month in a racist attack

Economy : Italy has experienced a sharp decline since the financial crisis of 2007-08. It has returned to sluggish growth , but unemployment is the third-highest in the eurozone at 11% and Italy has the second-worst debt burden after Greece.

Young Italians complain of lack of opportunities worsened by an entrenched system of favours and cronyism and, consequently, seek work abroad. Observers say they have heard more about pensioners than the youth during the campaign - and the reason may be young voters' high vote abstention rates.

Europe : Contenders have lined up to blame EU budget rules for hampering recovery. Five Star and the League had promised to hold a referendum to leave the euro. But that rhetoric has now been dropped.

Vaccines : The Five Star Movement wants to scrap a law on compulsory vaccination, despite evidence of a resurgence of measles .

Read more: Italy makes child vaccinations compulsory

Where they stand Parties/coalitions Migration Europe Economy Centre-right Deport illegal migrants, take control of borders, Marshall Plan for Africa Revise treaties, refuse overregulation, no more austerity policies from Europe, protect "Made in Italy" products Facilitate credit lines for small- and medium-sized enterprises, help young people access labour market Democratic Party No to Dublin regulation, stop aid for countries refusing to share burden More European political and social integration Reduce unemployment to under 9%, youth unemployment below 22%, guaranteed minimum wage, equal pay for women Five Star Movement Revise Dublin regulation, distribute asylum seekers across EU Find alternatives to the euro, strike alliances with Southern European countries, oppose austerity policies, protect "Made in Italy" products Free trade union representation, worker participation in decision-making, shorten working day, incentivise part-time work

Basic facts for the day:

The vote is for 630 members of the lower chamber (Camera dei Deputati), and 315 in the Senate

Some are elected in constituencies directly, the others picked from set party lists

You need to be 18 to vote for the lower chamber, 25 for the Senate. Italians overseas have their own constituencies

Voting times are 07:00-23:00 (06:00-22:00 GMT). Exit polls are expected soon afterwards, with final results the following day

Who's likely to become PM?

It is the first election under a new electoral law which encourages parties to form pre-election coalitions. Five Star has refused to join forces and Mr Di Maio's chances of becoming prime minister appear distant, even though his party may well come top in the share of the vote.

Image copyright AFP Image caption Silvio Berlusconi and Matteo Salvini - top row - lead the race; Matteo Renzi hopes the centre-left will win and Luigi Di Maio wants them all out

The centre-right coalition is likely to emerge the overall winner - but short of a majority. Mr Berlusconi is barred from running because of a criminal conviction. He has mooted the possibility of Antonio Tajani, the president of the European Parliament, becoming prime minister.

Likewise, the centre-left is unlikely to receive a majority. Mr Renzi has refused to say whether he will be the coalition's choice for PM, whilst refusing to support the incumbent at the same time.

So a grand coalition bringing the centre-right and centre-left together remains a possibility. A combination of the PD and Five Star will also cross the 50% threshold, but Mr Renzi has ruled out coalitions with "extremists".

What's at stake and should I care?

Yes - and no, for the time being.

Italy changes governments very often. However, a semblance of stability has been reigning in the past two decades, and Italians are getting used to regular voting intervals.

After Brexit, Italy will be the EU's third largest economy and its strength matters beyond its borders. After all, Greece's bailout quagmire haunts Europe. An unstable government in Italy will mean little or no growth - and a continued brain drain.

Is Italy likely to leave the eurozone? No, that issue has gone for the time being. It could be revived should the Eurosceptics of the League and the Five Star Movement somehow form a cabinet.

A final passing thought: Russia. Nato and the EU have not failed to notice that Mr Berlusconi remains close to President Vladimir Putin. The League is also pro-Russia, as is M5S.

Observers are wondering how a potential coalition of pro-Russia parties would affect EU consensus in, say, issues like sanctions against Russia over its alleged involvement in Ukraine.