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Show HN: Daily price tracking for Trader Joe's

traderjoesprices.com

51–60 of 154 posts

Re: Show HN: Daily price tracking for Trader Joe's

#51

Pleasantly surprised to see about as many price reductions as price increases. Also funny that they marked up the price of roses ahead of Valentine's Day!

It is supply and demand, but actually has a fascinating supply chain behind it that needs to be timed perfectly. There is a great Planet Money episode on it: https://www.npr.org/sections/money/2015/02/13/386005044/epis...

Re: Show HN: Daily price tracking for Trader Joe's

#54
post #20

Earlier quoted context omitted.

Except for a the obvious counter examples. Like food in general very in demand and very cheap. Housing very in demand but very expensive. So it’s really more about who decides the prices than what.

Econ 101 explains those counter examples as well: Food has high demand but lots of competition and easy substitution (rice expensive? buy pasta). Housing supply is limited (by location but often artificially via regulation) and substitution is difficult (have to move).

People are not economically rational. Most people don't buy pasta when rice is expensive. Econ 101 explains rational actors in a vaccum, not gluten free, asian culture, anti Italians sentiment, or hatred of Monsanto.

Re: Show HN: Daily price tracking for Trader Joe's

#56
post #39

Earlier quoted context omitted.

I'd love it if Apple (since they appear not to sell data) would provide an anonymized receipt analysis service like this. Huge user base right off the bat.

And who is the business consumer

Hmm, yeah I suppose anything promoting consumer knowledge would be antithesis to ordinary business schemes.

Pie in the sky, alas.

Maybe they could grab some preventative lobby money with the threat of it. /s

Re: Show HN: Daily price tracking for Trader Joe's

#57
post #18

Earlier quoted context omitted.

Why is it funny prices rose as demand increases? That’s Econ 101 expected behavior

iPhones dropped in price as demand increased. Demand isn't as important as marketing, and this is probably supply limited rather than demand.

It doesn't really make sense to talk about a single product from a single supplier when talking about supply and demand. You completely leave out the competition side that drives the whole system.

Re: Show HN: Daily price tracking for Trader Joe's

#58
post #31

Earlier quoted context omitted.

hmm, I guess I have a weekend project now. And thanks for the heads up about the toxicity, I use to save them all but after the move I simply take a picture with my phone and throw them out. paperless doesn't seem to be my exact use case but hopefully after it does the OCR transformation it can allow you to make a csv file.

I'd look into a document scanner for ease of use. They even have ones that auto loads, so no more waiting around. With that said, if you purchase a scanner, it probably already has proprietary OCR, and they have auto feeding ones for many documents. I foolishly bought one not knowing auto feeding was an option. https://youtu.be/fi0ZhTFaW7w I bought a brother 2 sided one since it had Linux drivers.

hmm, IDK if a scanner would help me. I already have pictures of my receipts. I might have to do more research because I feel like there's gotta be something out there where you can just show images of receipts and have it generate a csv of the data.

I'd even pay a decent amount to do it. After doing some more research it seems like MS Office might handle this workflow too in Excel (convert receipt picture to csv data).

Re: Show HN: Daily price tracking for Trader Joe's

#59
post #18

Earlier quoted context omitted.

iPhones dropped in price as demand increased. Demand isn't as important as marketing, and this is probably supply limited rather than demand.

It doesn't really make sense to talk about a single product from a single supplier when talking about supply and demand. You completely leave out the competition side that drives the whole system.

A single example of gravity not working means the theory of gravity doesn't work, unless you mean that economics should not have scientific scrutiny.

Economics is in a dire state of proving theories right. It only accounts for perfectly rational actors. A famous nobel prize winner was proven wrong in the same year or so and he said his graphs didn't account for it.

Re: Show HN: Daily price tracking for Trader Joe's

#60
post #5

Interesting! I’ve always held on to my grocery receipts for the last 8 years. I took pictures of them but when I moved a box got water damaged so now I only have like the last 3ish years. Is there any open source software that I can use to transfer these receipts into a useful csv? I have an idea for a few interesting data visualizations as I’d often buy the same things every week. Grocery bill went from like $70 to…

I have attempted this and the biggest issue is that sometimes the receipts use codes hard to understand. And the codes will change from store to store.

If you're lucky, you won't need to go to a grocery store and determine what a code means, you will only need to map the code to an actual item you bought.

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