Every month we write an article with a list of some of the games with the biggest increase and decrease in price. We call the series "Winners & Losers".
Winners: Video Games With Biggest Price Increase
Robot Alchemic Drive for PS2
King of Monsters for SNES
ActRaiser 2 for SNES
Nosferatu for SNES
Skyblazer for SNES
Losers: Video Games With Biggest Price Decrease
Fatal Frame for Xbox
Asphalt Urban GT 2 for DS
Shin Megami Tensei: Devil Survivor for DS
Cradle of Rome for DS
Super Star Kartz for DS
MethodologyThe list is made up of the games with the biggest change in price compared its average price in the last two years. We use the standard deviation for the prices to eliminate games that naturally have volatile prices.
For example, a game has an average price of $10 and a standard deviation in this price of $1. 96% of the time prices will be within $8 and $12. If during the next three months the price jumps to $14, then $15, and $16 after that we can be very confident the price increase is statistically significant.