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What the U.S. needs is an 18-cent coin

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21–30 of 32 posts

Re: What the U.S. needs is an 18-cent coin

#21
post #19

> Shallit assumed that every amount of change between 0 and 99 cents is equally likely. Fail. He could at least have blagged some transaction data from a retailer that actually does a bunch of small cash transactions. Just getting copies of the receipt roles from his local bodega would be better than this.

I stopped reading after this and came here to say this :-)

Re: What the U.S. needs is an 18-cent coin

#22

Or, they could get rid of every coin smaller than a quarter. Assuming every amount of change less than a dollar is equally likely, the average number of coins needed to make change now becomes 1.5 - and it's not like anybody really uses anything less than a quarter for anything other than coinstar anyways

[deleted]

Re: What the U.S. needs is an 18-cent coin

#23
post #13

No. What the U.S. needs is NO coins. (Seriously, does ANYONE use coins anymore? It's either bills or a credit card for me.)

As a non-American I'm always surprised that people want them to go away. I can't imagine buying anything without using coins. Is every price rounded up instead of the deceiving 99 Cents? Do you buy two items for 50 Cent each instead of one so you can pay with a bill?

Re: What the U.S. needs is an 18-cent coin

#24
post #13

No. What the U.S. needs is NO coins. (Seriously, does ANYONE use coins anymore? It's either bills or a credit card for me.)

I'd say it's banknotes that I don't use any more (here in the UK, which has the advantage of coins that go up to GBP2). For small amounts (vending machine, street food) it's coins; for anything larger it's credit card.

Re: What the U.S. needs is an 18-cent coin

#25
post #13

No. What the U.S. needs is NO coins. (Seriously, does ANYONE use coins anymore? It's either bills or a credit card for me.)

I don't use coins not because I use bills instead; I don't use coins because I don't use much cash.

I just came from a 3 week business trip in Europe, and at least the people I was around use the €1 and €2 coins all the time. I wish we'd get rid of our $1 bills and go to a $1 and $2 coin as well; very convenient. From what I understand, it's cheaper for the gov't in the long run too.

Re: What the U.S. needs is an 18-cent coin

#27
post #26
post #10

Earlier quoted context omitted.

The change may be more than a dollar, so tens of cents is not necessarily the leading digit.

the amount of coin change is never more than a dollar.

The amount of coin change is the remainder left over after dividing the total change by a dollar. Thus although the total change may or may not obey Benford's Law, the coin change certainly doesn't.

Re: What the U.S. needs is an 18-cent coin

#28
post #19

> Shallit assumed that every amount of change between 0 and 99 cents is equally likely. Fail. He could at least have blagged some transaction data from a retailer that actually does a bunch of small cash transactions. Just getting copies of the receipt roles from his local bodega would be better than this.

Why does it have to be small transactions? Every transaction, regardless of size, has a chance to end in anything from 0 to 99. The more items on your receipt the more chances to have different variations. Plus tax rate varies from area to area. I don't think that his assumption is that far off. But yes, he probably could have done something to get actual data.

Re: What the U.S. needs is an 18-cent coin

#29
post #19

> Shallit assumed that every amount of change between 0 and 99 cents is equally likely. Fail. He could at least have blagged some transaction data from a retailer that actually does a bunch of small cash transactions. Just getting copies of the receipt roles from his local bodega would be better than this.

Why does it have to be small transactions? Every transaction, regardless of size, has a chance to end in anything from 0 to 99. The more items on your receipt the more chances to have different variations. Plus tax rate varies from area to area. I don't think that his assumption is that far off. But yes, he probably could have done something to get actual data.

It should be small transactions because cash is being used less and less often for medium-to-large transactions.

It's not safe to assume that all cent values from 0 to 99 are equally likely because of the fact that cash transactions tend to be small. The number of items being purchased will also tend to be small. So the fact that most prices for individual items tend to end in 99, 95 or some other multiple of five cents should have a huge impact on the distributions in real life, especially for transactions to which sales tax does not apply.

For example in Oregon, a state with no sales tax, the fewest number of items you'd be able to buy at $0.99 or $0.95 to get a $x.32 total is at least 20. (That's a whole lot of "fun size" bags of potato chips.) The total would come out to $19.32, at which point a lot of people would just pay with plastic, anyway. Perhaps most people would.

Re: What the U.S. needs is an 18-cent coin

#30

Earlier quoted context omitted.

Why does it have to be small transactions? Every transaction, regardless of size, has a chance to end in anything from 0 to 99. The more items on your receipt the more chances to have different variations. Plus tax rate varies from area to area. I don't think that his assumption is that far off. But yes, he probably could have done something to get actual data.

It should be small transactions because cash is being used less and less often for medium-to-large transactions. It's not safe to assume that all cent values from 0 to 99 are equally likely because of the fact that cash transactions tend to be small. The number of items being purchased will also tend to be small. So the fact that most prices for individual items tend to end in 99, 95 or some other multiple of five ce…

I suppose. I guess I use cash more than others. I would easily toss a $20 at a $19.32 bill.
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