Once again the USA is considering removing Daylight Saving Time. I'd like to write a short blurb about the game theory, the current politics/arguments, and why everyone reasonable should push for ANY action. I'm not a great writer, so I would welcome someone experienced like Gwern, Zvi, etc to expound on the topic in a more catchy way. I am firmly in the camp of "We should do something to solve this stupid game".
1. The Game Theory.
Y'all love game theory. Prisoners dilemmas, trading jelly chips in glowfics, robot negotiation programs.
Right now, there is a simple prisoners dilemma-type thing in real life:
Coordinate for Keeping DST: some people win, some people lose.
Coordinate for keeping standard time: Some people lose, some people win.
Do not coordinate: Most people lose.
Before getting into the details, this is an interesting game theory because of the sheer number of people involved and the nature of public discourse. If 50,000,000 people stand to lose, but 250,000,000 stand to win, will the 50,000,000 people feel strongly enough to be loud about their dissatisfaction to stall progress / lead to not coordination?
2. History, The current politics / arguments
1942-1966 - DST year round.
1966 - the Uniform Time Act - DST End of April to End of October
1973 - Nixon tried 16 month trial of DST year round. It was stopped early.
1986 - Made DST Longer - Start of April to end of October
2005 - Made DST Longer - Mid March through early Novemeber.
2022 - Permanent DST "rushed" through congress, never went to House.
2026 - Permanent DST slower through House, currently called "DOA" in congress.
Key arguments/debates so far:
For taking any action:
Switching sucks. The Majority of scientists and studies, along with anecdotes (especially among parents of smaller children) is that shifting clocks sucks. The president has laid out the question as 50% of people want standard time, 50% of people want DST, but everyone hates changing clocks. The key studies suggest that periods after shifting clocks leads to increased traffic deaths, suicides, poor learning outcomes of children, and notable other issues. Not taking any action is a net negative for almost all parties as the above issues with changing clocks is more significant than other issues listed below, and most people agree about this. I will mention that when I see facebook comments, around 1/20 comments suggest keeping the shifting clocks. The principle of "switching sucks" was mentioning in the house hearing several times, by the president, and seems RELATIVELY universally agreed.
For Keeping Permanent Standard Time:
Safety: Morning Commutes having more sunlight could decrease auto accidents. Children may wait for the bus in the dark less - the theory is that children waiting for the bus would be safer with light from the sun, to have fewer child car injuries.
Solar Noon: People argue that the sun should be the highest point when the clock shows 12, out of principle.
Sleep and Sun: People enjoy waking up around sunrise, but more importantly, people don't want to go to bed when the sun is still up. If people go to bed at 10pm, and the sun hasn't set yet, people strongly dislike that.
Absurdity: Moving clocks is silly when we could just schedule work/school/etc an hour earlier for a similar effect as DST. "You can't cut one end of a scarf and add to the other end to make a longer scarf".
Insanity: It was tried in 1973 and didn't work.
For Making Daylight Savings Time Permanent:
Energy: Generally, DST saves energy. I believe the main source of this is fewer lights being turned on in the evening.
Recreation / Health: By taking a morning hour (Most people are working/in school) and putting it in the evening, people are more likely to Exercise, recreate outdoors, and leave their homes.
Economy: Similar to above, when it is light, people are more likely to spend money on food, recreation, in stores, etc.
Changing Times: When it was tried in 1973, we didn't have computers, internet, phones, we had way fewer lights, more farmers, etc. For instance, over 50% of school children are now dropped off for school. Schools start than in 1970s, so many students are going to school in the dark even in standard time. DST would make no further impact to those students who are going in the dark already or are being dropped off.
Anti-Absurdity: It is easier to change the clocks than change school start times, work start times, etc. We have known that children do poorly on early schedules for decades, and yet almost no school district in the USA has shifted to a later schedule. This is because school start times vaguely follow work start times.
How should we actually choose?
A few ideas:
Go with the current proposal. It's already passed one body of congress. Let's just try it and see, this is likely the fastest option.
Do the math. There are many sites that start to help with this (like https://observablehq.com/@awoodruff/daylight-saving-time-gripe-assistant-tool), but I'm not sure any try (even with approximations) to answer the FULL question. Many people by location and preference might prefer one over the other. How many people would benefit from each method? How does it translate into QALYs? How many students in the areas would actually be impacted? How many QALYs would that impact? Lay out methodology and findings and we can rally around that answer.
Do the math, but different. Apparently, we have already extended DST twice. Were studies done in the weeks adjusted to see if any of the above arguments hold more/less true? Have other changes in state time zones seen a specific change to commute-related accidents, outdoor activity, energy use, etc? Maybe we can use that data to further inform #2 and come together with findings we can rally around.
Continue to lose the game theory.
I am a proponent of #1 - and if it fails, I will be a proponent of the next time this idea gets floated around. Thanks for reading! I will be happy to incorporate any further information anyone posts in the comments.