<p>One possible explanation for the scenario you are describing is <a href="https://en.wikipedia.org/wiki/Endowment_effect">Endowment effect</a>. </p>

<blockquote>
  <p>In psychology and behavioral economics, the endowment effect is the
  hypothesis that people ascribe more value to things merely because
  they own them.</p>
</blockquote>

<p>One of the theories that explain the phenomenon is <a href="https://en.wikipedia.org/wiki/Endowment_effect#Loss_aversion">based on loss
aversion</a> : </p>

<blockquote>
  <p>It was proposed by Kahneman and his colleagues that the
  endowment effect is, in part, due to the fact that once a person owns
  an item, forgoing it feels like a loss, and humans are loss-averse.</p>
</blockquote>

CC BY-SA 3.0
2016-03-29T13:49:51.750Z
Hi DesignerAnalyst, thanks for your answer. Please cope with me but I fail to relate how would Endowment effect that makes me overvalue my stuff would explain myself wanting sell my stuff at a loss if I know that I am better off throwing it out. Shouldn't loss aversion make me want to throw the stuff out even more. Or you think that since I overvalue my stuff I see it of greater value and therefore it shouldn't go to waste?
Matas Vaitkevicius
CC BY-SA 3.0
2016-03-29T14:30:13.707Z
@MatasVaitkevicius I originally wanted to point out that the desire to "sell at a loss" might be just a mental trick to keep the stuff. It is almost certain that not all 100% of the stuff will be sold in one attempt, so the failed attempt may be used as a rationalization to keep the stuff to sell at some point in the future.
Alex Stone
CC BY-SA 3.0
2016-03-29T15:16:02.140Z
@AlexStone early stage of https://en.wikipedia.org/wiki/Compulsive_hoarding :)
Matas Vaitkevicius
CC BY-SA 3.0
2016-03-27T17:04:01.047Z
2016-03-27T17:04:01.047Z
DesignerAnalyst
<p>Let's say person is moving homes and has lots of kids toys, suits, shirts, ties and other stuff that he seldom uses. </p>

<p>He is am planning to sell it all in a car boot sale even if he knows that it's counter productive. He would have to use ~30£ on entry fees and fuel, without even accounting for Sunday lost. </p>

<p>Logical solution would be just drive to the nearest skip or charity shop, and yet he can't make himself to do it, <strong>which of cognitive bias is at play here?</strong></p>

<p>I don't think this is 'sunk cost' because he is loosing that stuff anyway, it's just that loosing it and <strong>knowing that someone else will be able to use it</strong> somehow makes ones loss more acceptable, which is sub-optimal and suggests a bias.</p>

CC BY-SA 3.0
2016-03-26T19:18:41.593Z
This question is mostly centred on personal experience, which is off topic on this site. If you removed personal references and asked about the tendency to keep stuff in general, it would be a valid question.
Seanny123
CC BY-SA 3.0
2016-03-26T21:30:02.393Z
@Seanny123 I agree with you that question indeed is based on personal experience, but everything is - which means it does not make it less scientific to describe it in this way. I could argue that it makes it much more understandable. Anyway I could rewrite it in 3rd person, would that help?
Matas Vaitkevicius
CC BY-SA 3.0
2016-03-26T21:37:40.883Z
Honestly, it would. We're really touchy on this site in terms of any sort of personal advice, because we get a deluge of inappropriate personal questions every day. Consequently, we never want to show any sort of tendency towards personal questions. (:
Seanny123
CC BY-SA 3.0
2016-03-26T22:02:38.357Z
@Seanny123 Done, and thanks for the advice.
Matas Vaitkevicius
CC BY-SA 3.0
2016-03-28T18:24:30.397Z
The question can be worded in a better way, but the issue it is raising is very real. Anyone who tried to get rid of the old stuff runs into the issue of keeping stuff "just because", maybe it will be useful in the future, maybe it will be useful in side projects, maybe someone will want it. All of these reasons are highly unlikely, so it's hard to throw stuff out.
Alex Stone
CC BY-SA 3.0
2016-03-29T13:52:29.453Z
@AlexStone Hi Alex, I must be confusing people here, I am certain this isn't hoarding, but rather something that makes me want that stuff to be reused by someone else, even if it's costing me.
Matas Vaitkevicius
<bias>
What cognitive bias prevents you from discarding stuff?
Matas Vaitkevicius
# What cognitive bias prevents you from discarding stuff?

(Asked by: username_0 on 2016-03-26)

Let's say person is moving homes and has lots of kids toys, suits, shirts, ties and other stuff that he seldom uses.

He is am planning to sell it all in a car boot sale even if he knows that it's counter productive. He would have to use ~30£ on entry fees and fuel, without even accounting for Sunday lost.

Logical solution would be just drive to the nearest skip or charity shop, and yet he can't make himself to do it, **which of cognitive bias is at play here?**

I don't think this is 'sunk cost' because he is loosing that stuff anyway, it's just that loosing it and **knowing that someone else will be able to use it** somehow makes ones loss more acceptable, which is sub-optimal and suggests a bias.

**Tags:** bias

> **Comments:**
> **username_1**: This question is mostly centred on personal experience, which is off topic on this site. If you removed personal references and asked about the tendency to keep stuff in general, it would be a valid question.  
> **username_0**: @username_1 I agree with you that question indeed is based on personal experience, but everything is - which means it does not make it less scientific to describe it in this way. I could argue that it makes it much more understandable. Anyway I could rewrite it in 3rd person, would that help?  
> **username_1**: Honestly, it would. We're really touchy on this site in terms of any sort of personal advice, because we get a deluge of inappropriate personal questions every day. Consequently, we never want to show any sort of tendency towards personal questions. (:  
> **username_0**: @username_1 Done, and thanks for the advice.  
> **username_2**: The question can be worded in a better way, but the issue it is raising is very real. Anyone who tried to get rid of the old stuff runs into the issue of keeping stuff "just because", maybe it will be useful in the future, maybe it will be useful in side projects, maybe someone will want it. All of these reasons are highly unlikely, so it's hard to throw stuff out.  
> **username_0**: @AlexStone Hi Alex, I must be confusing people here, I am certain this isn't hoarding, but rather something that makes me want that stuff to be reused by someone else, even if it's costing me.  

---

## 1 answers

### Answer by username_3 on 2016-03-27. Score: 4 | Accepted answer

One possible explanation for the scenario you are describing is [Endowment effect](https://en.wikipedia.org/wiki/Endowment_effect).

> In psychology and behavioral economics, the endowment effect is the
> hypothesis that people ascribe more value to things merely because
> they own them.

One of the theories that explain the phenomenon is [based on loss
aversion](https://en.wikipedia.org/wiki/Endowment_effect#Loss_aversion) :

> It was proposed by Kahneman and his colleagues that the
> endowment effect is, in part, due to the fact that once a person owns
> an item, forgoing it feels like a loss, and humans are loss-averse.

> **Comments:**
> **username_0**: Hi username_3, thanks for your answer. Please cope with me but I fail to relate how would Endowment effect that makes me overvalue my stuff would explain myself wanting sell my stuff at a loss if I know that I am better off throwing it out. Shouldn't loss aversion make me want to throw the stuff out even more. Or you think that since I overvalue my stuff I see it of greater value and therefore it shouldn't go to waste?  
> **username_2**: @MatasVaitkevicius I originally wanted to point out that the desire to "sell at a loss" might be just a mental trick to keep the stuff. It is almost certain that not all 100% of the stuff will be sold in one attempt, so the failed attempt may be used as a rationalization to keep the stuff to sell at some point in the future.  
> **username_0**: @AlexStone early stage of https://en.wikipedia.org/wiki/Compulsive_hoarding :)  

---

