The Twenty-Niners

By David Henderson of EconLog.

""We're Hiring Economics Writers," says the headline of a post at the web site FiveThirtyEight.
Good for them.
Then they write:

This is a part-time staff position (up to 29 hours per week) and does not offer benefits.

Any idea why they chose 29 hours? Answer: Obamacare.
Here's how a video at Prager University puts it:

This is Kelly. She's a hard-working, independent college student. To pay for school, she works between 35 and 39 hours a week at her local grocery store. But today's been rough for Kelly. She has just been told that she's now part of a new group of Americans: the "29ers"...
Starting in 2015, the Affordable Care Act requires many companies to offer health insurance to employees who work 30 hours or more a week. As you may have guessed, the grocery store Kelly works for is one of these companies."