Do you want to work out?

Some time ago, my roommate took a gym leaflet at the subway entrance and left a phone number and WeChat, asking that person to contact him often to visit. One weekend afternoon, I went to see it when I was free. Sales staff encouraged us to apply for annual cards, saying that annual cards are the cheapest, only 1500 a year. For three years in a row, the card discount is more, and it is only a few dollars a day. We can also take yoga, cycling and fighting courses. But most classes start at 7 pm, and so do weekend classes. Another disadvantage is that you can't swim without a swimming pool.

At that time, I was struggling. First of all, the time is not very suitable. We get home at 7: 30 at the earliest after work, so I can't attend classes at night. I will work overtime in the evenings and weekends recently, so I can go less. Secondly, if you want to learn swimming courses, you have to re-apply for classes. Moreover, our house expires in August, and it is still uncertain where to move then. Moreover, I also practice flat support every day and keep exercising, and the effect is not bad. Roommates also have gyms, treadmills and spinning bikes. It's almost eight o'clock after work, so it's not a good time. So, I didn't bring my card when I came back.

In fact, many people impulsively apply for annual cards, thinking that if they spend so much money, they will be motivated and can't let the money go to waste. I have a classmate who has applied for a fitness card. At first, he was very excited. He would go several times a week, but then the excitement passed and he couldn't go several times a month.

What the gym likes best is the members who can't go several times after getting the card. The same is true for most people who are impulsive to apply for cards.

In fact, I bought a tourist year card two years ago, including many scenic spots in Beijing and Hebei. It is valid for one year until 20 15, 12, 3 1, and I haven't used it once, not once. Alas.

Renting a house in Beijing is normal. Have you ever had such an experience? I just moved into a newly rented house and found a house with better facilities and cheaper rent in the same community. What will you do at this time?

Don't you want to give up the house you have now, and you won't change it if you are too lazy to move things? There is a word in economics that is the lingering effect, that is, when people make choices, they don't want to give up what they already have.

It's like hearing a joke that a girl who is already in love has fallen in love with another person. How to choose? Choose the second one. If you love the first one enough, you can't love the second one.

In fact, I personally have a lazy way, that is, whether I buy clothes, rent a house, or something else, I will stop paying attention to such information after paying the money and continue to look forward to saving myself from the entanglement. Because sometimes the tangled time is more precious than the extra money you spend. After all, our time is the most precious.

When a friend has a birthday or moves to a new home, you need to bring a gift. Do you think it is not easy to buy gifts?

On the one hand, giving gifts to friends usually leads to "unnecessary losses". When you give a gift to a friend, for example, you spend 300 yuan to buy a big plush toy, but if the person who receives the gift buys it himself, he usually only spends 200 yuan to buy the toy at most. Among them, 100 yuan is called unnecessary loss.

On the other hand, another important factor in giving gifts is emotional value. As the saying goes, courtesy is light and affection is heavy. The friendship contained in this gift is very special.

I think giving gifts can give something practical, such as what the other person needs. A friend of mine gave his friend a flat-topped pot as a gift, because his friend moved during that time and needed to buy a pot. This also saves the other party from finding a place for this gift, and he doesn't have to spend more money.

If you really can't find what he needs, you can do some photo albums and so on. A book can record some past youth. After graduating from college, each of us made a youth photo album to record the precious memories of college.

When parents educate their children, sometimes the children do something wrong, and the parents will reprimand or beat and scold them. If the hands are too heavy, the children will get hurt and the parents will feel very uncomfortable.

In fact, "quick feedback" is a good way to form or stick to a good habit. This method is also suitable for children. For example, in school, when children behave well, the teacher will give them a small red flower, and if they don't finish their homework or obey the discipline, the teacher will give them a big black cross. Children are also rational and need immediate feedback.

As we mentioned before, obese people slowly start to improve their diet through the habit of recording, because they don't want their records to be too ugly.

In family education, we can also use the theory of small red flowers and big black forks to increase rewards and punishments. Avoiding scolding children is easier to establish parents' prestige and promote family harmony.

What if the husband and wife divorce and quarrel over the distribution of property, and both want to monopolize the property themselves?

This is a game theory problem in economics. Both people give half the price of the property, and the highest bidder gets the property and pays the average price quoted by the other two people. This is a very reasonable distribution scheme. If both parties want to get the property, because it is stipulated that the highest bidder will get it, they will not give a particularly low price. If they give too much, they will lose a lot, so they will give a reasonable offer.

In fact, many inseparable properties, houses, equity and so on. This economic principle can be used to distribute.

The above five points come from the column Dear Undercover Economics, and the author Tim Harford is regarded as "the most humorous master of life economics". He often answers strange questions in readers' lives with authoritative economic views, just like an undercover detective lurking around everyone.