The rubbersheet economy (as a dialogue): 1. Prices move according to the law of supply and demand. 2. Right: why do they move though? 1. Simple: every hour t

The rubbersheet economy (as a dialogue): 1. Prices move according to the law of supply and demand. 2. Right: why do they move though? 1. Simple: every hour the central government determines the current supply and demand for all goods, and computes the right price. It looks like a market economy, the prices move in the right direction (the balls are "attracted" to each other), but the explanation is a planned economy (the effect of Earth gravity).