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The announcement day, t = 0, is defined as the first identifiable date in the WSJI or the Dow Jones News Retrieval Service Data Base.
We create a clean sample by excluding competitors and their corresponding initiation announcements contaminated by other WSJI events within the (-3, +3) window.
We develop the clean sample by excluding rivals and their corresponding initiation announcements contaminated by other WSJI events within the (-15, +15) window.
The difference from existing, standalone research services is, of course, that on the Internet, WSJI has a potential audience of millions, rather than hundreds or thousands.
Next, for each firm we obtain the stock price for the two days around the call date or the redemption date (day - 1 and day 0, where day 0 is the call or redemption date as reported in the WSJI), to calculate the bond's conversion value.
We use the WSJI to obtain the date of initial announcement for each convertible bond issue.
Market model parameters are estimated using continuously compounded returns for the 200-day period starting 250 days before the announcement date (for transactions reported in the WSJI) or the transaction date (for transactions not reported in the WSJI).
The length of this event window depends on the type of transaction and on WSJI information.
We report data on all the transactions and on the subset of transactions with WSJI information.
We also find that the returns are higher in those cases where WSJI information is available (column (4)).(12)
The WSJI was also searched over a longer time period, from 1962 to 1989, to similarly identify announcements of foreign lending agreements by the sample USBHCs.
To investigate this result, we partition our sample into mergers (304), tender offers (155), comprehensive acquisitions of assets (93), and other acquisitions (746) that cannot be assigned to any of the three preceding categories on the basis of information reported in M&A or in the WSJI.(9)
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