Have you got any tips on planning the 15 and 20 markers?
For 20 Markers, i suggest revising Market failure and gov intervention in depth (benefits and problems with each type of intervention). Make 3 points in relation to the question, and evaluate each point. For 15 Marker, i would do a similar thing structure wise to the 20 Marker. Revise all of the longer topics on the specification e.g. price mechanism, elasticity, specialisation and division of labour. These are probably the most likely sections to come up for the long answer questions (e.g. 6,10 and 15 markers)
For 20 Markers, i suggest revising Market failure and gov intervention in depth (benefits and problems with each type of intervention). Make 3 points in relation to the question, and evaluate each point. For 15 Marker, i would do a similar thing structure wise to the 20 Marker. Revise all of the longer topics on the specification e.g. price mechanism, elasticity, specialisation and division of labour. These are probably the most likely sections to come up for the long answer questions (e.g. 6,10 and 15 markers)