• 75% of millennials age 25-34 years old work 31-50 hours a week, with 16% working 51 or more hours.
• Similarly, 74% of those 35-64 years old work 31-50 hours a week, with 17% working 51 or more.
• Americans aged 25-34 year old spend an average of 4.93 hours each day on work or work-related activities. That's versus 5.22 hours for ages 35-44 years old and 4.97 hours for ages 45-54 years old, according to the Bureau of Labor Statistics.

Between the lines: A number of other factors, including student debt, job insecurity and low pay may contribute to millennial stress and anxiety.

Another takeaway: Anecdotally, millennials are thought to be distinct in frequently blurring the lines between their work and personal lives.

• But over 70% of people polled found it important to have friends at work — across all age demographics.

Go deeper: Why are millennials so obsessed with how much they work? (Daniel Engber — Slate)

The big picture: Apps are the new norm in dating. But the hyper-personalized and endless choices enabled by technology may actually be making it more difficult to meet “the one.”

Gamification is now built into dating:

• TV series like "The Bachelor," China's "If You Are the One" and Britain's "Love Island" have played off cultural courting traditions to create popular, dramatic and competitive game shows.
• In apps, the format of swiping can intensify pleasurable chemical reactions in the brain, and the “infinite scroll” persuades users to continue swiping into perpetuity.
• With almost endless options for partners, dating has become about "fast sex, slow love," Helen Fisher, chief scientific adviser for Match.com told Axios.

"The mechanics of the swipe feature: It's fun, it's a yes or no game."

By the numbers: Millennials spend 10 hours per week on dating apps, according to Badoo, the world’s most popular dating platform with more than 400 million users in 190 countries.

• And almost one in six singles (15%) say they feel addicted to the process of looking for a date, per a 2017 Match survey.

Why it matters: Part of playing the game is to make yourself as desirable as possible, which can lead to high, unmet expectations.

• "We’re showing people this near perfect version of ourselves. It is highly tailored," Ohio State University's Jesse Fox told Axios. "You build up your hopes and expectations and then you meet — and it's awkward."
• Many dating app executives who spoke with Axios are wary to call the platforms a game. "People are trying to maximize to find the ideal," Bumble's in-house sociologist, Jessica Carbino, suggests, "which is the sort of market nature of love."
• "People are able to go on more dates, find more people and, as a result, they're actually waiting longer to get married than ever before, but they're also, I think, choosing the best partner for them," McLeod said.

The bottom line: In 2017, 39% of U.S. heterosexual relationships and 65% of same-sex relationships began online. And apps aren't going away.

• For some, "it's a form of work, not just a game anymore," says Stephanie Tong of Wayne State University.
• A cottage industry of services to write profiles, tend to matches and get swipes is popping up. Some, like Relationship Hero, have coaches around the world, available 24/7 to text, call or even video chat through a user's dating woes.
• Now, Tong says, it isn't about projecting confidence face-to-face but about how to write a fancier profile.

Go deeper: Read the special report on the future of dating

• The new rite of passage: Young, busy and still single
• By the numbers: Online dating is losing its stigma
• Facebook wants to be your matchmaker
• The loneliness epidemic: Singles turn to matchmakers for help
• The price we'll pay for a date
• Online dating can expose users to privacy breaches
• The inhumanity of automated matchmaking
• What dating apps are doing to fight bias
• You're most likely to get "ghosted" in Austin