What is the free time that maximizes satisfaction to life? Research result that it is useless if too much

In order to do what you want to do, you need funds and conditions before you need it, so you need to do your job and studies moderately. On the other hand, if you desperately desperate for work or school and your own free time decreases, you will end up getting stressed. Researchers at the University of California, Los Angeles (UCLA) have announced an analysis that "there is a correlation between the level of satisfaction with living and the amount of free time". Among them, the researchers claim that "Free time is neither too much nor too little, and people are most satisfied when given a good length."

The Effects of Being Time Poor and Time Rich on Life Satisfaction by Marissa Sharif, Cassie Mogilner, Hal Hershfield :: SSRN
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3285436

How Much Free Time Do the Happiest People Have? - The Atlantic
https://www.theatlantic.com/family/archive/2019/02/free-time-life-satisfaction/583171/

The research team analyzed two large-scale data sets targeting 35,375 Americans and conducted a survey on "current life satisfaction" and "free time owned per day". Then it turns out that the living satisfaction of the person who is working reaches the peak when there is free time of 2 hours 30 minutes per day. In addition, we also found that the satisfaction level of those who did not work was the maximum when free time was 4 hours 45 minutes per day.

It has been pointed out that there is a correlation between free time and satisfaction with living. However, according to Professor Cassie Mogilner Holmes of UCLA who is a coauthor of the paper, "The more free time there is, the less satisfied the living will be, and if we can give more free time beyond the optimum value It seems that this research found that the satisfaction level declined. "

However, Daniel Hamermesh, an economist at the University of Texas at Austin, says a skeptical view that the study "may prove difficult to argue that it correlates free time with living satisfaction" . According to Hamermesh, the free time estimated by respondents among the data analyzed in this paper is not accurate and lacks reliability. Also, Hamermesh notes that it is difficult to talk about whether or not it is systematically free time, because the definition of what kind of time is free time varies from person to person.

Meanwhile, Mr. Hamermesh acknowledges that there is a precedent study showing that "time sensation and life satisfaction are strongly linked". For example, in a paper published in 2017, it is reported that "buying time by using money" leads to happiness.

Hiring a daily diary or assistant to "buy your time" discovered that people can be happier - GIGAZINE

In other words, by saving time to cook food by buying food outside and by hiring a housekeeper and saving time of cleaning, your free time increases and your lifestyle satisfaction increases, Happiness increases. Mr. Hamermesh says "You can reduce your stress by doing 1 hour of sleeping and TV watching instead of 1 hour of work."

Professor Holmes says, "Human happiness degree may be related not only to" how much free time do you have "but also" when you have free time. "At what timing do you want free time, I would like to conduct research on how the order and structure affects the happiness degree of people. "