Entrepreneurship takes a big jump at age 65. Guess Why?

[mythology]

55. Considering that most small businesses take a while to turn a profit

the ability to use Social Security to help cover the gap in income is a smart idea.

I don't think that there's a way to estimate exactly what factors influence people to start a small business at a particular age. There are a lot of potential factors to consider and at least the summary article doesn't actually really consider any of them because they have a conclusion and are crafting the story around the conclusion rather than the conclusion around the evidence.

For example, they talk about how you shouldn't consider the additional revenue streams such as Social Security, pensions, 401ks etc because that money would possibly make the person retire and do nothing. But there's no actual evidence presented either way to support or disprove the theory.

Or in the section where they note that people in their 40s and 50s are least likely to start a business they chalk it up to note wanting to risk a child's health insurance. But they don't talk about the fact that small businesses often don't create a profit in the first year or two. It's hard to feed your kids on just future potential profits. Additionally most people have taken on mortgages and are in their relatively highest income growth levels at that point.

There are plenty of good reasons to support single payer universal health care. Unfortunately this article doesn't actually go into them.