Originally posted by: CycloWizard
	
	
		
		
			Originally posted by: 3chordcharlie
You are (both of you) applying a very juvenile definiton of 'inelastic'. You're also freely switching between 'short-run' and 'long-run' effects of price changes.
		
		
	 
Please educate us rather than just name-calling.  I know a good deal about the theory of elasticity.  That economics has borrowed it to describe financial systems makes me think they are connected.  The idea that something is "inelastic" is analagous to the idea of a rigid body - it's an approximation that holds in some limiting cases.  However, it's obvious that it does not hold in this case because the price and demand have followed each other in some fashion.
		
 
		
	 
There is really no such thing as perfectly inelastic demand. In economics, elastic and inelastic are used to describe the degree to which one quantitative measure responds to changes in another. Gas would be considered quite inelastic in the short-run, because when the price changes today, you still have to go through with your plans for tomorrow (like going to work). People can't make drastic changes immediately, so demand for commodities tends to be inelastic in the short term. If the price of gas fell to $1/gallon tomorrow, thousands of people would still drive their Prius to work, because they hadn't had time to trade it in on the Ford Explorer they could now comfortably afford to drive.
	
	
		
		
			
	
	
		
		
			Cyclo, if you think people always and only pay 'what something is worth', then why, when oil was $9 a barrel, was nobody voluntarily throwing in an extra $20/fillup at the gas station, if the oil was 'worth' so much more to them than the posted price?
		
		
	 
We can spend all day making graphs of 'marginal' and 'average' demand, and use new and used car sales/prices to try to map out what people really think oil is 'worth', or you can actually stop being obtuse instead of only saying you don't want to be.
		
 
		
	 
And you can tell me why I'm wrong, or you can just call me names and try to denigrate me.  The bottom line is that people will pay what they feel something is worth at that time, short of someone holding a gun to their head and making them do it.  Since I have yet to observe this, I can only assume that people think that the gas they are buying is worth what they are paying for it.[/quote]
'What something is worth' is a nebulous concept, and many people have guns to their heads all the time, especially in today-tomorrow-next-week time-frame. 
Try to think of it this way: No matter the price of gas, you will drive to work tomorrow, in whatever vehicle it is that you drive. You will do this because you need to, and you would do it (for one day) even if the gas cost more than your pay. We can be pretty sure of this, because most of us, for one of our teenage jobs, had circumstances that forced us to spend more than our lousy pay on a cab-ride to make a shift. (Broken car, unreliable ride, missed the bus, slept in, whatever).
Obviously this is an unsustainable situation, so people make changes (Over the last 4 months, North America has stopped buying trucks and SUVs as commuter vehicles). Since what is sold at gas stations isn't really 'gas' but 'mobility', the price is actually different for every single purchaser: While the little 250cc bike at the pump is busy buying 200miles for $8, the contractor is buying 250 miles worth of towing 10,000lbs for $150 in his F350, and the middle-manager is paying $100 for 300 miles in his Sierra (while looking enviously at the bike, and hoping his wife finds a nice Civic for them to buy soon).
At any given time, most people can't just run out and buy a new vehicle today, or move tomorrow, or change jobs by Monday. In the weeks-months-years timeframe, people will respond to sustained high prices, and you will get a good idea of what they actually think gas is 'worth'.