Consider a line that represents the mixture of economies between central planning and private markets. On the extreme left are the economies that are 100% centrally planned. On the extreme right are the economies that are 100% private market-based.
It's difficult to say exactly what constitutes a 50% centrally planned economy or a 75% private market economy. Given that, in what order would you put the following countries in terms of their public/private mixture within their economy?
North Korea, Cuba, China, India, Germany, Canada, France, US, Sweden, Great Britain
If you want extra fun, roughly, where would you place them?
Update 1: Bill Polley sends along a link which contains some hints.