In a letter to the Center for Reproductive Rights denying the petition, the FDA disclosed for the first time that Teva would have had three years of exclusivity for full non-prescription sales of Plan B One-Step if the application had been approved.

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But B-to-B business decisions involve huge price points, long sales cycles, and can make or break careers.

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Form 1099-B, long used to report stock and mutual fund-sales prices, will be expanded in 2011 (2012 for mutual-fund shares) to include the cost or other basis of stock and mutual-fund shares sold or exchanged during the year.

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While sales of A-B's core brands are down 1% year-to-date, they've edged up in May, just ahead of the important summer selling season.

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Teva Women's Health, which makes Plan B, said it would begin over-the-counter sales in a few months.

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And Congress is likely soon to require brokers to report to the Internal Revenue Service and to you not just the gross proceeds of securities sales (as they do now on form 1099-B) but also your cost basis.

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But with B-share holders calling the shots, such firms tend to underinvest, leading to lower sales growth and valuations than with single-share-class firms, according to a study by Harvard Business School's Paul Gompers, Stanford's Joy Ishii and Wharton's Andrew Metrick.

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Those include forms 1099-B (for reporting of proceeds from brokers and barter exchanges), 1099-S (for reporting real estate sales) and the ever popular 1099- MISC (if amounts are reported in boxes 8 or 14).

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