By John Tozzi

The Kauffman Foundation reports that very few VC firms deliver the outsized returns that investors expect from the asset class. Our chart from their data, in last week’s magazine, shows how dismal it is. The full report is here.

In other recent research, Kauffman shows that a widely cited number for how many jobs IPOs create is misleading.

Earlier this month in Bloomberg Businessweek, I wrote about venture capital firms from China that invest in American startups and help them do business on the mainland.

In this week’s Bloomberg Businessweek: a look at how one electronic health records company is using its data to get a broader understanding of public health trends.

Also online: more questions about what happens if small businesses shift to self-insurance; freelancers want to get paid too; and how new laws might pave the way for local investing.

This week in the magazine: how MIT engineers made solar cells out of paper, Saran wrap, and fabric.

Also online: a brief history of the home office tax deduction, a look at the SEC’s coming task in regulating crowdfunding, and a conversation with a food truck entrepreneur.

How one company’s software helps citizens get around censorship, in Iran and elsewhere, at least for now.

Some of my recent health care stories from Businessweek:

Health Reform’s Small Business Confusion: Many companies still don’t know how the law will affect them.

Getting a Grip on Medicine’s Slippery Price Tag: How the cost of basic tests can vary widely depending on what doctor you see.

Small Business Makes a Risky Bet on Health Care: Why more small companies are dropping traditional insurance to go it alone, and how that could threaten the effectiveness of health reform.

Yelp went public this week. Yesterday we looked at it’s local advertising business, which accounts for 70 percent of its revenue.

The fastest growing jobs in the U.S. are home care workers who assist the elderly or infirm who can’t take care of themselves. The government is reviewing laws that exempt some of those workers from certain overtime and minimum wage requirements and could force the industry to raise pay.

(Also, another piece in Bloomberg Businessweek last year examined the patchwork of regulation in the home care business.)

This week on (the new) Businessweek.com, my piece on what it takes to get into the TED conference. One attendee applied eight years in a row before she got the nod.

Here’s my story from Bloomberg.com about On Demand Books, which makes a machine to print paperbacks on-site at bookstores and libraries. Originally conceived to give bookstores limitless inventory, it’s now used largely by self-published authors.

Two other recent stories about the publishing business: The NYT on Barnes and Noble’s digital efforts, and Businessweek’s Brad Stone on Amazon’s publishing venture.