IB Economics Paper 3 includes two compulsory questions. This is a sample Paper 3 question. The time allowed for Paper 3 is 105 minutes, so students should spend 52.5 minutes on each question. This Paper 3 style question is on trade barriers, tariffs and quotas. Inex is a developing country with a large agricultural sector that grows corn and raw cotton, with any shortage in the market imported from its neighbouring countries....