This is what I think
High highly likely NOT: (these were asked 2015)
- External stability
- International orgs/trade agreements
- Eco growth sources/effects
Probably not:
- Micro policies (asked in 2015 but repeating it IS possible but unlikely)
- Inflation (ask in 2014, and inflation questions aren't asked much at all)
Possible: These questions haven't been asked in a while. I don't think they are likely, but they are possible
- Free trade/protection (reasons for protection, basis of free trade - advantages/disadvantages, methods of protection)
- Composition/direction of trade (curveball)
- Global economy (features i.e. trade, financial flows etc.) may even international/regional business cycles.
- Reasons for differences between nations (income inequality)
Highly likey
- Case study (last case study question was 2014 - and case study is asked every 2-3 years. THIS IS OVERDUE). All the easy case study questions (imo) have been asked already over the past 15 or so years. Expect a case study question that could surprise you
- macro policies (fiscal AND/OR monetary) - macro policies are so huge in economics they ask it pretty much EVERY YEAR. Expect a question that includes it. Possible that they link macro policies with an economics issue such as income inequality (or anything else really...).
- Distribution of income and wealth (sources of wealth, trends in distribution of income, impact of eco policies on distribution). They've asked standalone questions on every eco issue (eco growth 2015, inflation 2014, external stability 2015, environment 2014, unemployment 2013). The only one they haven't covered is distribution of income and wealth.
Highly Highly Highly likely
- Exchange rates (super overdue)