Changes
Jump to navigation
Jump to search
→Analyis Calculations and Notes
*Year x anaic2 (2 digit acquiror naic) fixed effect indicators were created
*CARM variables (Market Model CAR) were created for the 7 day window for the figures
*Vscore variables were created for the significance tests on CARS using the RMSE from the estimation window: <math>vscore = \abs\left(\frac{carm}{\left(\frac{rmse}{\sqrt{n}}\right)}\right)</math>. This was done on a per group basis, using the variable names xgroupvar, where group=it or itvc or null.
*Year range variables from 1 to 6 were created for years 1985-1989, ... , 2005-2009, 2010-2011.
*In the regression analysis we clustered standard errors on acqno (the cusip-announceday pair that could have multiple acquisitions, marked with ''sameday''=1), using STATA's vce(cluster ''clustvar'') documented here: http://www.stata.com/support/faqs/stat/robust_ref.html
