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→Introduction of Compustat and Preparation for Stata
===Introduction of Compustat and Preparation for Stata===
See script for exact work: <code>E:\McNair\Projects\LBO\LBO academic paper script post compustat</code>
Create tables as follows:
*sdc '''SDC''' with SDC data imported from the initial LBO data.
*'''LBOCOMPUSTAT4 ''' with Compustat data imported.
*'''dealnumbxgvkey ''' selecting deal numbers and gvkeys from table sdc.
*'''compustatnamematch ''' with compustat names matched against themselves imported
*'''stdcompnamestdorgnamematched ''' with standardized compustat names matched against stdorgname
*'''matchedlbocompnames ''' with standardized original lbo names matched to standardized compustat names
*'''compnamematchlbocompnames ''' with standardized compustat names, compustatnames, and standardized original lbo names
*'''stdcompnamepatentjoin ''' with variables standardized compustat names and patent numbers
*'''compustatpatentinfo ''' with variables standardized compustat names, patent numbers, and grant dates
*'''stdcompnamexgvkeycleaned ''' with variables standardized compustat names and gvkeys
*'''ALLGVKey ''' with all distinct gvkeys from stdcompnamexgvkeycleaned
*'''AllYears ''' with all years from 1970 to 2016
*'''KeysXYears ''' with variables gvkey and year. Each gvkey corresponds to 47 years.
*'''keysxyearsxstdcompname ''' with variables gvkeys, years, and standardized compustat names
*'''compupatentyearsummary ''' with variables standardized compustat names, gvkeys, years, and number of patents per year
*'''dealnumbxgvkeyxlboyeartemp ''' with variables deal numbers, gvkeys, LBO years, and exit years
*'''dealnumbxgvkeyxlboyear ''' with variables deal numbers, gvkeys, lbo years, exit years, entry year 1, entry year 2, exit year 1, and exit year 2
*'''compupatentlboyearsummary ''' with variables standard compustat names, gvkeys, years, number of patents per year, and lbo entries/exits in each year
*'''statastaging ''' with all variables from compupatentlboyearsummary in addition to all the pulled compustat variables
*'''sicnaicsconversion ''' with sic codes and naics codes as a conversion table for adding naics that correspond to the sic codes in blank rows
*'''statastagingnew ''' with two extra columns, concordsic and concordnaics, then export to stata
===Stata Work===
