I'll be doing a brief and simple explanation of the elasticity in good in WoW (Price elasticity of demand - Wikipedia, the free encyclopedia).
The Wikipedia definition is pretty straightforward to understand, but as it goes in depth, it gets more confusing. I'll explain it as best as possible.
Here's their quote.
Price elasticity of demand (PED) is defined as the measure of responsiveness in the quantity demanded for a commodity as a result of change in price of the same commodity. It is a measure of how consumers react to a change in price.
We will be looking at http://en.wikipedia.org/wiki/Elasticity_%28economics%29
Now a real life example of a product being in-elastic is petrol. No matter how much the price changes, people will always buy it, as it is a necessity. Lets reflect this on WoW.
No matter how much the price changes for Scarlet Rubiespeople will always buy it, as it is almost a necessity for raiders. (STR,AGI gems)
Warriors and hunters can't socket a lower grade gem, as their GMs won't be too happy, nor can they gem another color, as it's not only useless, their GMs once again will not be happy.
A real life example of a product being elastic is luxury cars (Lets say convertibles). When there is a massive change (lets take increase) in price, almost NO ONE will buy it. Lets reflect this on WoW.
When the price of Lichbloom goes through the roof because new Flasks need them, Scribes choose a substitute good instead of Lichbloom. Icethorn and Adder's Tongue are substitute goods for Scribes because they all produce the same thing (and same amount) once milled.
In-game In-elastic example: Flasks
For raiding, especially high-end, every single raider is expected to have flasks, therefore, it is a necessity. So no matter how high the price soars, there WILL ALWAYS BE DEMAND FOR IT. They may not buy it already made (they will craft it themselves), but there is always a demand for it, therefore a movement in price will barely affect the amount demanded.
In-game elastic example: Orb of Deception - Item - World of Warcraft
No player needs this item. It is a luxury, and is therefore not required. So when there is a change in price (down) the demand for it will soar, because it is not a necessity!!
In-game in-elastic example: Infinite Dusts
Every single half-decent raider is expected to have their items enchanted, and therefore a necessity among raiders. This means that a small change in price will not affect the demand, as it is a necessity.
This topic is actually very hard to understand, if you have any questions, please feel free to ask.
Please see my other Economics 101 guide if you wish to further improve your understanding.
http://www.mmowned.com/forums/wow-gu...old-elite.html
Final Note: I understand that it's a wall of text, but here's something simple for you to swallow.
If you CBF reading, then GTFO. You will always be poor.
Don't lurk, posting Thank You! will be enough!