[quote]LIFTICVSMAXIMVS wrote:
But not to a real economist. A real economist cannot say why a human does certain things beyond “self interest”. He can only say what will happen as a result of many persons acting in “self interest”; however, psychology plays no role in what a real economist does.
Besides, no one can predict human actions – not even a psychologist!
So, maybe you are right if you say psychology affects human action. Though it is a tautological statement. In other words – no shit! but we will never learn anything about economics from it.[/quote]
I’m sorry, but you can in fact predict human actions. Obviously not with 100% accuracy, but you can. Everyone likes to think they are somehow different from everybody else, but people are more alike then they admit. In magic there is a whole field called mentalism that exploits this fact.
It is known that when something becomes more expensive, generally less people buy it. Apples become more expensive, and people are less likely to buy them, while if bananas drop at the same time, sales of bananas will increase.
Interestingly it seems to work the opposite in the investment world.
Just today I listened to an Economist talking about the increase in minimum wage, and offered an estimate (prediction) of the number of people who would lose their job as a result. The number was higher then if the increase occurred in “good” economic times. But there it was, an Economist offering a prediction.
Now there are a lot of Economists making predictions, and most of them don’t know shit. Although too many are not really doing economics, many are salesmen, politicians, or sometimes there just saying things because it gets them on TV.
Let’s say you bought a lemonade stand that sells 100 glasses of lemonade a day at $1 a glass. You decide that instead of grossing $100 a day, you could sell each glass at $10, and gross $1000 a day. Obviously you will lose most, if not all of your customers.
Naturally this is an extreme example, but there are people who actually try this on a smaller scale, and are always surprised when their sales drop.
When you try to predict what one person is going to do, that is guessing. But when you try to predict what thousands of people are going to do, that is statistics.