Coalition government
A coalition government, or coalition cabinet, is a government by political parties that enter into a power-sharing arrangement of the executive. Coalition governments usually occur when no single party has achieved an absolute majority after an election. A party not having majority is common under proportional representation, but not in nations with majoritarian electoral systems.
There are different forms of coalition governments, minority coalitions and surplus majority coalition governments. A surplus majority coalition government controls more than the absolute majority of seats in parliament necessary to have a majority in the government, whereas minority coalition governments do not hold the majority of legislative seats.[1]
A coalition government may also be created in a time of national difficulty or crisis (for example, during wartime or economic crisis) to give a government the high degree of perceived political legitimacy or collective identity, it can also play a role in diminishing internal political strife. In such times, parties have formed all-party coalitions (national unity governments, grand coalitions).
If a coalition collapses, the Prime Minister and cabinet may be ousted by a vote of no confidence, call snap elections, form a new majority coalition, or continue as a minority government.
Formation of coalition governments[edit]
For a coalition to come about the coalition partners need to compromise on their policy expectations. One coalition or probing partner must lose for the other one to win, to achieve a Nash equilibrium, which is necessary for a coalition to form. If the parties are not willing to compromise, the coalition will not come about.[2]
Before parties form a coalition government, they formulate a coalition agreement, in which they state what policies they try to adapt in the legislative period.
Electoral accountability[edit]
Coalition governments can also impact voting behavior by diminishing the clarity of responsibility.
Electoral accountability is harder to achieve in coalition governments than in single party governments because there is no direct responsibility within the governing parties in the coalition. [5]
Retrospective voting has a huge influence on the outcome of an election. However, the risk of retrospective voting is a lot weaker with coalition governments than in single party governments. Within the coalition, the party with the head of state has the biggest risk of retrospective voting.[6]
Governing cost[edit]
Governing parties lose votes in the election after their legislative period, this is called “the governing cost”. In comparison, a single- party government has a higher electoral cost, than a party that holds the office of the prime minister. Furthermore, the party that holds the office of prime minister suffer less electoral costs, then a junior coalition partner, when looking only on the electoral cost created by being in the coalition government. [7]