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Useful Mental Models (2016)

defmacro.org

41–50 of 75 posts

Re: Useful Mental Models (2016)

#41
post #21

It would be good to include some mental models for attitude towards money. Things I have noticed about myself: No problem paying for something that absolutely needs to be done. E.g. repair a leak in the roof. Replace something. Don't notice money spent on regular monthly payments. E.g. mortgage. Don't notice $1000 spent as 50*$20 but more frightening to spend $1000 at once. Fear of loss when investing is big. It feel…

Earn $1000 = $500 after taxes. :)

Not spend $500=$500 after taxes.

Re: Useful Mental Models (2016)

#42
post #21

It would be good to include some mental models for attitude towards money. Things I have noticed about myself: No problem paying for something that absolutely needs to be done. E.g. repair a leak in the roof. Replace something. Don't notice money spent on regular monthly payments. E.g. mortgage. Don't notice $1000 spent as 50*$20 but more frightening to spend $1000 at once. Fear of loss when investing is big. It feel…

Earn $1000 = $500 after taxes. :)

Depending on where you live, that extra 5 hundred means that the streets are safe, you have clean drinking water on tap and if you get hit by a car crossing the stree you'll probably make it. And defence and welfare and such and such. suck it up. Taxes have a point.

Re: Useful Mental Models (2016)

#43

Earlier quoted context omitted.

Depends on the country. In US, it seems that everybody does their taxes and all salaries and income are discussed as "before tax"; in Russia, for example, all taxes and payments for employees are done on employer's side and all salaries and income are usually discussed as "after tax" - people don't even usually know how much are they earning "before tax".

How can you handle more complex scenarios without knowing your before tax salaries? For example, working two jobs.

don't work two jobs, be happier

Re: Useful Mental Models (2016)

#44
post #36

Earlier quoted context omitted.

Depends on the country. In US, it seems that everybody does their taxes and all salaries and income are discussed as "before tax"; in Russia, for example, all taxes and payments for employees are done on employer's side and all salaries and income are usually discussed as "after tax" - people don't even usually know how much are they earning "before tax".

Same here in the UK. You can look at how much tax you've paid on your payslip, but you never feel like that money was yours in the first place since it never hits your bank. I had to complete a tax return for the first time last year, although it's completely illogical (and I'd budgeted the number so knew what it would be well in advance), it felt more painful paying the ~£_,000 of extra tax I owed than paying the ~£…

> You can look at how much tax you've paid on your payslip, but you never feel like that money was yours in the first place since it never hits your bank.

It is the same in the US - however, if you get a job offer in the US for a given salary - that is a pre-tax number. I believe the grandparent was making the point that in Russia, salary and wages are discussed purely in after-tax terms.

Re: Useful Mental Models (2016)

#45
post #17

Nice. This is a good addition to "List of cognitive biases", a Wikipedia article I've liked to read from time to time ever since I discovered it, years ago. https://en.wikipedia.org/wiki/List_of_cognitive_biases As a Stoic, it's good food for thought to improve your "perception" of life and the world.

I personally find a lot of the material about cognitive biases hard to swallow -- I was forcing myself really hard when I read Kahneman's book. There were some good points but while reading it something just seemed off in a way similar to trying to break down the world into a rigid dichotomy -- likes "is the a ok approximate anwser?" "Yes" "Would I use it?" "Possibly with great skeptism and appropriate weight given the context, but likely not"

Re: Useful Mental Models (2016)

#46
post #27

Most of these are really good, especially productivity and time estimation. Some I do not agree with (although perhaps the model presented is useful depending on desired outcome). -Efficient market hypothesis: Markets are not fully efficient and the state of the world is not optimal. Thus opportunities exist. It's our job as engineers (and business people/humanitarians/writers/philosophers etc.) to recognize and corr…

This was a really good viewpoint as it made me realize that the listed things are not only useful mental models but deeply connected to values. These models are used to guide your thinking which will affect your behavior. Therefore it's very important to be careful with what rules-of-thumb you decide to follow.

Of course, it's also important to reflect on your thinking and be able to spot the exception that proves the rule. But it's unrealistic to be constantly vigilant about your own analysis of things. You need abstractions (eg. mental models) to be efficient, but leaky abstractions will ruin you.

Re: Useful Mental Models (2016)

#47

Earlier quoted context omitted.

Depends on the country. In US, it seems that everybody does their taxes and all salaries and income are discussed as "before tax"; in Russia, for example, all taxes and payments for employees are done on employer's side and all salaries and income are usually discussed as "after tax" - people don't even usually know how much are they earning "before tax".

How can you handle more complex scenarios without knowing your before tax salaries? For example, working two jobs.

Simple and predictable tax code that almost never depends on any particular person: flat 13% tax. (It's much worse and complicated for companies though).

Re: Useful Mental Models (2016)

#48
post #16

Earlier quoted context omitted.

The article said, “upgrade the units and double the estimate.” So 20 hours -> 40 days -> 80 weeks -> 160 months

so 1 month -> 2 years but 4 weeks -> only 8 months

I think the proposed method should be categorized as a hyperbole.

Re: Useful Mental Models (2016)

#50
post #42
post #21

Earlier quoted context omitted.

Earn $1000 = $500 after taxes. :)

Depending on where you live, that extra 5 hundred means that the streets are safe, you have clean drinking water on tap and if you get hit by a car crossing the stree you'll probably make it. And defence and welfare and such and such. suck it up. Taxes have a point.

> suck it up. Taxes have a point.

Your comment feels completely out of line.

This comment thread is talking about mental models about money. The GP comment isn't complaining about taxes. Most likely, the observation about taxes is to say that earning an additional $1000 income does not translate into the same amount that could be spent. Or something similar, related to the mental model topic they're talking about.

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