From Reuters comes an article published by the Dutch Centre for Insurance Statistics showing that fewer accidents and reports of fire and theft occur when the 13th falls on a Friday than on other Fridays. From the article:
“I find it hard to believe that it is because people are preventatively more careful or just stay home, but statistically speaking, driving is a little bit safer on Friday 13th,” CVS statistician Alex Hoen told the Verzekerd insurance magazine.
In the last two years, Dutch insurers received reports of an average 7,800 traffic accidents each Friday, the CVS study said. But the average figure when the 13th fell on a Friday was just 7,500.
You can see the article here on the Reuters website.