CEO of the Executive Branch
Head of Government
Head of government is the chief officer of the executive branch of a government, often presiding over a cabinet. In a parliamentary system, the head of government is often styled prime minister, chief minister, premier, etc. In presidential republics or absolute monarchies, the head of government may be the same person as the head of state, who is often also called a president or a monarch.
In a parliamentary system, the head of state is normally a different person from the head of government. This is in contrast to a presidential system in a democracy, where the head of state often is also the head of government, and most importantly: the executive branch does not derive its democratic legitimacy from the legislature. The Parliamentary system can be contrasted with a presidential system which operates under a stricter separation of powers, whereby the executive does not form part of, nor is appointed by, the parliamentary or legislative body. In such a system, congresses do not select or dismiss heads of governments, and governments cannot request an early dissolution as may be the case for parliaments. Since the legislative branch has more power over the executive branch in a parliamentary system, a notable amount of studies by political scientists have shown that parliamentary systems show lower levels of corruption than presidential systems of government.