Overall, corruption reduces efficiency and increases inequality. Estimates show that the cost of corruption equals more than 5% of global GDP (US$ 2.6 trillion, World Economic Forum) with over US$ 1 trillion paid in bribes each year (World Bank).  Engaging in corrupt practices also creates a very unfavourable business environment by encouraging unfair advantage and anti-competitive practices.  As well as allowing organised crime to flourish, corruption is one of the primary obstacles to the economic development of a country; it undermines the rule of law, weakens trust in public institutions and challenges democratic principles.