The economics issues investigated by The Big Question so far have been:

02-10-04 Does aid work?
09-10-04 What is Free Trade?
16-10-04 How fair is free trade?
13-11-04 How much does the world rely on oil?
20-11-04 Can we live without oil?
08-01-05 What is money?
15-01-05 Why do we get into debt?
26-02-05 Is this China's Century?

Also on Open2.net...The Industrial Revolution - how did the change from an agrarian economy affect the British landscape?
PY's Rules of the Game - join P Y Gerbeau to explore the economics of sport and other business questions
More Or Less - Radio 4's weekly number-crunching exploration of the difference between facts and figures

Courses
If you'd like to take your interest in this area further, the Open University might have a course for you - regardless of where you live. Many OU courses are available worldwide, making use of the web, email and electronic conferencing. The exact range of courses available to you will depend on the country in which you live.