CAN you write an Economist picture caption? The excellent standard of entries in our previouscompetitions suggests that many of you can: here's a fresh chance for you to see your wit in print.

The photo above will accompany an article in our Business section in this week's issue. Wikipedia, the user-generated encyclopedia, is ten years old. It has much to celebrate: its latest fund-raising campaign recently generated $16m from its readers, who coughed up the cash in record time. Key to the site's efforts were near-ubiquitous banner advertisements featuring Wikipedia's co-founder, Jimmy Wales (pictured), whose famous face proved to be more effective than many other images in persuading readers to open their wallets. (Or, to look at it another way, people were prepared to pay up to get the images of Mr Wales taken down.)

Mr Wales's picture has now been replaced by a "thank you" message on Wikipedia, but we will be giving it one more outing in the pages of The Economist. It's up to you to provide the caption: please leave your suggestions in the comments thread below. As before it should be as short and snappy as possible, and definitely no more than about 30 characters long. The best contribution will appear beneath the photo in this week's print edition, which is published on Friday morning. Entries close at midnight London time on Wednesday evening, so you've got a little more than 48 hours. The only reward is that the winner can then truthfully claim to have written (at least a few words) for The Economist. Over to you.

Update: Entries are now closed, and we have announced the results.