Numbers

Clarification Appended: April 23, 2008

DOMESTICITY

7 Number of extra hours of housework per week performed by married women in the U.S., compared with single women. According to a new study, the overall amount of housework done by women dropped 35% between 1976 and 2005

1 Number of extra hours of housework per week that single men do, compared with married men

FOOTWEAR

$79 Average cost of a pair of Crocs footwear in Israel

$3.60 Cost of a pair of pirated, Chinese-made Crocs being sold to Palestinians

HIGHER EDUCATION

100 years Age of the world's first formal master's of business administration program. Harvard started offering its first M.B.A. courses in 1908

500,000 Expected number of M.B.A. graduates globally in 2008. In China, the number has gone from zero to 30,000 in the past decade

INTERNET

$2.6 million Amount paid to 43-year-old Maryland resident Chris Clark for the domain name Pizza.com Clark bought it for $20 in 1994

2,156 Number of "cybersquatting" complaints a U.N. intellectual-property watchdog agency received in 2007, up nearly 50% since 2005. These complaints charge some domain owners with abusing online trademark registration

Sources: University of Michigan Institute for Social Research (2); International Herald Tribune (2); Financial Times (2); BBC; Reuters

The original version of this article referred to Harvard as having "the world's oldest master's of business administration program," dating back to 1908. While Harvard was the first institution to offer a graduate business degree formally known as an MBA, the Tuck School of Business at Dartmouth is in fact the oldest graduate business school, having first offered a degree in what it called administration and finance back in 1900 (the school began referring to its degree as an MBA in 1941).