In Israel, the head of the government is Reuven Rivlin. The government system of Israel is a Unitary parliamentary republic. In Israel, the legislative power is vested in a Knesset; this is a Unicameral legislative body, and therefore a Unicameral Knesset. According to the World Bank Group, the government effectiveness index of Israel is 1.16. This indicates that the government of Israel is effective. Citizens enjoy well-organized public and civil services, and government efficiency is high. While some services may be lacking in certain areas, the overall environment fostered by government legislation is favorable.