Basically I have said in the past that the price will be about $4-5 dollars a gallon. The reason for this is people on Minimum wage MUST stop buying gasoline at that point. Such workers can NOT pay for their home, their food, the upkeep of their car AND the gasoline for that car at $4.00 a gallon (and this is assuming such worker is living in Public Housing NOT Private rental units).
Now as you go up in income the numbers are not as clear, but as the price of Oil meets your hourly income rate you have to stop buying gasoline. This formula starts to fail at about 4-5 times the minimum wage for the proportion of your income you spend on food declines as your income goes up (thus opening up more money for Gasoline).
If you are interested the Calculation I used to come up with $5.00 a gallon are as follows:
1. Minimum wage is $5.15 per hour.
2. If you work 40 hours a week 52 weeks a hear that is 2080 hours
3. Public Housing requires a tenant to pay 30% of their income as rent.
4. The average car gets 20 miles to the Gallon
5. The average American Driver drives 15,000 miles per year.
6. People eat 3 meals a day for 365 days or a total of 1095 meals a year (I will use 1000 meals a year for ease of Calculation),
7. Social Security Tax is 7%, most local taxes are 2% with various states taxing income at anywhere from 0-5% (My home state of Pennsylvania has a Straight 2.2% income tax, i.e. NOT graduated). Given these taxes we will assume a tax rate of 10% for Minimum wage workers.
Given these facts, you can see that the average drivers uses 750 gallons of gasoline per year (15,000 Miles per year Divided by 20 Miles per gallon average for a car).
These numbers also point out the Minimum wage earner earns about $10,000 a year (Exact figure $10,712 but I will use $10,000 for ease of calculation).
Rent for a minimum wage earner in public housing must be $3000 per year (It will be MUCH more in non-public Housing). If your meals cost $1 a meal (a VERY LOW figure) that comes to $1000 a year. Taxes are another $1000 a year (See paragraph 7 Above). Thus before we ever get into the issue of a car the wage earner has spent HALF of his income just to stay alive (i.e. $5000).
Insurance, oil changes, and other maintenance on a car will run you at least $1000 a year (Most people will pay more). Thus you have $4000 left over for Gasoline.
750 Gallons at $2 a gallon is $1500 a year. At $4 a Gallon the minimum age earner spends $3000 on Gasoline. At $5 a gallon he is Spending $3750. Thus the Minimum wage earner MUST stop Driving to work when gasoline reaches $5.00 a gallon. I suspect it will be closer to $4 for no one can eat on $3 a day (and Notice I ignored clothing, and any child support the wage earner must pay, either in taking care of his or her children or regular child support payments).
I do this exercise to show something has to give WHILE before prices get as high as $4 to $5 a gallon. The numbers are just NOT doable. The above is a BEST CASE SCENARIO for Minimum Wage Earners.
Higher income people will be able to spend about the same on Food as low income people, but have higher housing costs. Thus the numbers do not work as while for people earning $20 an hour (i.e. $40,000 a year of which $15,000 may be housing, $5000 may be automotive, compared to the minimum wage earners numbers of $3000 and $1000. Taxes for the $20 an hour worker will be higher but still about $10,000, which still leaves him or her $15,000 to buy gasoline which at $20 a gallon will be $15,000). Furthermore the person making $20 an hour can buy a new fuel efficient car (which will change these numbers drastically) but low income people generally do not have the Income to do so (Even if such low fuel use cars would be available given higher income people ability to outbid the Minimum wage earner hen buying such cars).
Thus my point is the first big group of people will be mini mun wage earners as the price of Gasoline exceeds their budget to buy gasoline. This will continue till you get what economist call "Equilibrium" where the demand for Gasoline will equal the supply. Please note there will be wide price variation before and after "Equilibrium". The first reason for this will be people will stop buying gasoline as it exceeds their budget. Gasoline price will peak and than decline to a point where someone can afford it again. This will force the price back up do to this increase demand. This up and down will go on and on for the supply of oil will slowly go down making each new peak higher and higher (and each new low, higher and higher). It will be a mess but people will have to give up their use of oil for the price to stabilize at any price people can afford.
For previous threads on this topic see:
http://www.democraticunderground.com/discuss/duboard.php?az=show_topic&forum=114&topic_id=11978http://www.democraticunderground.com/discuss/duboard.php?az=show_topic&forum=114&topic_id=10763#10771