My interview took place in November. I arrived at the porter's lodge and was directed to a room to wait until it was my interview slot. There were no tests on the day and no work was needed to be submitted beforehand. My first interview was with a PhD student which lasted approximately 20 minutes and my second interview was with two of the economics fellows which also lasted 20 minutes.

The first interview I had to expand on things I had mentioned in my personal statement and answer a simple game theory question which most would have come across having read a beginners book on the subject.

The second interview was more difficult, with a more in-depth discussion of an aspect of economic development something I had also mentioned in my personal statement. I also had to work through a maths/logic question on a whiteboard, which required a knowledge of maths roughly similar to A-level but was just presented in a different format.

I mentioned 4 books in my personal statement and made sure I read them before interview - The Bottom Billion, Poor Economics, Nudge and The Joy of Game Theory which together give a decent introduction to development economics, behavioural economics and game theory respectively. This combined with what I had learnt in economics lessons up in school was sufficient. I had one practice interview with an ex-Oxford student which the school organised for me - but other than that relatively little and I would say I was less prepared than most.

For economics I would not say there is a need to learn any economic theory beyond what is in the A-level course, they just want to see evidence that you are interested in the subject outside of school and showing that you have read books such as those I mention above will be enough. Don't worry if you don't immediately get to the correct answer, they want to see the way you think through a problem so make sure you articulate your thought processes as you work your way through a problem.