"Should directors be nervous?" (News: Analysis & Commentary, Mar. 6) incorrectly stated that Patrick McGurn, senior vice-president of Institutional Shareholder Services Inc., said ISS's proxy recommendations typically swing about 20% of investor votes. That estimate of ISS's influence came from other sources. "Low tide for Amazon?" (Inside Wall Street, Mar. 13) should have said that Amazon.com's (AMZN

) excess cash on the balance sheet, not free cash flow, is $4.24 a share. "Sony's iPod assault is no threat to Apple" (Global Business, Mar. 13) incorrectly stated that the new Walkman NW-A3000 would be the first Sony (SNE

) Corp. digital music player with a hard disk drive to be sold in the U.S. "Doll Wars" (Up Front, Mar. 13) should have noted that Mattel's (MAT

) claim that Barbie "continues to be the No. 1 girls' brand" is true if you include all Barbie-branded toys. "And baby makes...a market" (Books, Feb. 27) incorrectly stated that 30% of U.S. men are infertile. According to the Cornell University Center for Male Reproductive Medicine, 10% of all U.S. men attempting to conceive suffer from infertility, and in about 30% of couples who are trying to conceive, the man is the problem.