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Variables & Where to Find Them:{| class="wikitable sortable" style="border: 1px solid darkgray; bgcolor: #f9f9f9"| '''Variable''' || '''Location'''|-| Actual Return || CRSP|-| Abnormal Return || CRSP|-| Average Return || CRSP|-| Weighted Average Return || CRSP|-| Cumulative Ab. Return || CRSP|-| Boom || SDC|-| Competition || Compustat|-| Distance || SDC + google maps|-| IT Fixed Effect || SDC|-| Idiosyncratic Volatility || CRSP (Calculated)|-| Industry Fixed Effect || SDC|-| Momentum || CRSP (Calculated)|-| Private Financial Data || CRSP|-| Percent Cash || SDC|-| Previous Acquisitions || SDC|-| Sales || Compustat|-| Tobin's Q || Compustat|-| Turnover || CRSP|-| VC Fixed Event || SDC & VentureXpert|-| Governance || Compustat|-| Friendly vs. Hostile || SDC|}
List of variables in the CRSP-oct10.txt(For description of variables see E:\McNair\Projects\Winner's Curse\Data\SQL\oct10 CRSP.txt * PERMNO* date* EXCHCD * SICCD*NCUSIP *TICKER *COMNAM*NAICS*PRIMEXCH*PERMCO*CUSIP*PRC*VOL*RET*SHR*OUT*NUMTRD*vwretdPE*ewretd CREATE TABLE CRSP (
The We have unexpected data file, crsp-oct10.txt, has a header types in the first linefew columns. I couldn't find an argument for copy from function to account for this. So, IWe'll just delete the first line from the file and try again to copy the start by copying data into the crsp a table. tail -n +2 CRSP-oct10.txt > CRSP-oct10NH.stdout I renamed the output to CRSP-NH, NH named CRSPtmp with varchar type for no header. Let's take a look if most of the header is actually removed. head -2 CRSP-NHfields.txt
output:10000 1986/01/06 7952 68391610 -0.000138 0.00192610000 1986/01/07 3 3990 68391610 OMFGA OPTIMUM MANUFACTURING INC Q 7952 68391610 -2.56250 1000 C 3680 0.013809 0.011061 Now, let's copy the data from CRSP-NH.txt into the CRSP table. \COPY crsp FROM '/bulk/WinnersCurse/CRSP-NH.txt';ERROR: invalid input syntax for integer: ""CONTEXT: COPY crsp, line 1, column excode: "" To avoid problems such the one above, I'll just copy all the variables as varchar. CREATE TABLE CRSPtmp (
\COPY CRSPtmp crsptmp FROM '/bulk/WinnersCurse/CRSP-NHoct10.txt'WITH DELIMITER AS E'\t' HEADER NULL AS '' CSV -- COPY 64614281 Next, to create an index on CUSIP: CREATE INDEX CUSIPIndex ON crspfinal(CUSIP);===CRSP2 Variable Issues (Jake)=== permno- date- excode - sic - letter "Z", value 711 (most are 4 digits), ncusip - ticker - name - naics - primex - permco - cusip - Price - Null values, negative numbers, vol - null values ret - null values, letter "B" as value multiple times, letter "C", shout - null values trade - null values eqret - vret - ==Importing SDC Data into Winner Database== Session Details --------------- Request Hits Request Description 0 - DATABASES: Domestic Mergers, 1979-Present (MA, OMA) 1 - Date Announced: 1/1/1985 to 10/11/2016 (Custom) (Calendar) 2 300400 Target Nation : US 3 257952 Acquiror Nation : US 4 127865 Acquiror Public Status : P 5 98108 Target Public Status : V, P 6 63732 Deal Status : C 7 52746 Percent of Shares Owned after Transaction: 100 to 100 8 Custom Report: SDC_MA_Oct10v4 (Columnar) - Save As: E:\McNair\Projects\Winner's Curse\Data\SDC_MA_Oct10v4.txt Billing Ref # : 1962461 Capture File : riceuniv.1962461 Session Name : SDC_MA_Oct10v4.ssh We encountered an issue with the variable Purpose Code in our most recentSDC pull. Purpose Code can carry multiple values, so we had extra lineswith blanks for every value other than Purpose Code. Rather than doing another SDC pull, we used the following regular expressions to solve: Find : ^[\s}.* Replace : Directly below is the original SDC file prior to our fix E:\McNair\Projects\Winner's Curse\Data\SDC_MA_Oct10v4 -raw Directly below is the SDC file post-fix E:\McNair\Projects\Winner's Curse\Data\SDC_MA_Oct10v4 11332 rows were removed as a result of our regular expression use. === Normalizing SDC data ===Make sure that the first line of the data file starts with the column names and column name are not preceded by empty lines. Also, remove the summary/report lines at the bottom of the text file. A copy of the normalizer is save here E:\McNair\Projects\Winner's Curse\Data\NormalizeFixedWidth.pl Follow these steps:# Activate the Komodo license.# Open Komodo IDE 9, there should be a shortcut on your desktop# Drag and drop NormalizeFixedWidth.pl in Komdo# Click on the start or continue debugging# Type : -file=SDC_MA_Oct10v4.txt in Script Arguments textbox. # Click on OK# Enter the number of last line of the header and press return. This should be the line immediately followed by the first row of data. ########################################################## # NormalizeFixedWidth.pl # # v0.01 # # (c)Ed Egan, 2010 # ########################################################## Starting the program... [Done] Your run options are: File to read from... [SDC_MA_Oct10v4.txt] File to write to... [SDC_MA_Oct10v4-normal.txt] Opening the input file to read... [Done] ########################################################## Choose the last line of the header (inc. blanks): 0 Date Date Target Name 1 Announced Effective 2 3 4 5 6 01/01/85 01/01/85 Gladieux Corp 7 01/02/85 01/02/85 STG Electrosystems Inc 8 01/03/85 01/03/85 American Title Co 9 01/04/85 01/04/85 Bee Chemical Co Your Choice: 5 Thank you - Proceeding now... ########################################################## Determining markers... [Done] Processing the header... [Done] Processing the body... [Done] Removing dead columns... [Done] ########################################################## Choose any columns you want repeated down (e.g. 0,1,2): 0 Date Announced 1 Date Effective 2 Target Name 3 Target Industry Sector 4 Target Nation 5 Acquiror Name 6 Acquiror Industry Sector 7 Acquiror Nation 8 Pc of Shares Acq 9 Pc Owned After Transaction 10 Value of Transaction mil 11 Enterprise Value mil 12 Equity Value mil 13 Acquiror CUSIP 14 Acquiror Immediate Parent CUSIP 15 Acquiror Ultimate Parent CUSIP 16 Target Immediate Parent CUSIP 17 Target Ultimate Parent CUSIP 18 Target CUSIP 19 Acquiror Primary Ticker Symbol 20 Acquiror Ultimate Parent Primary Ticker Symbol 21 Target Primary Ticker Symbol 22 Target Ultimate Parent Primary Ticker Symbol 23 Acquiror Primary NAIC Code 24 Acquiror Ultimate Parent Primary NAIC Code 25 Target Primary NAIC Code 26 Target s Ultimate Parent Primary NAIC Code 27 Number of Bidders 28 Status 29 Value Est 30 Value Amended Flag 31 Date Announced is Estimated 32 Consideration Structure 33 Number of Considerations Offered 34 Number of Considerations Sought 35 Consid Structure Description 36 Pc of Cash 37 Pc of Other 38 Pc of Stock 39 Pc of Unknown 40 Acquiror Full Name 41 Target Name 42 Acquiror City 43 Target City 44 Acquiror Zip Code 45 Target Zip Code 46 Acquiror State 47 Target State 48 Deal Currency Code 49 Target Bankrupt 50 Challenged Deal 51 Debt Restructuring 52 RecapDefense 53 Government Owned Involvement Flag 54 Joint Venture 55 Restructuring 56 Acquiror is a Leveraged Buyout Firm 57 LBO 58 IPO FlagY N 59 Target is a Leveraged Buyout Firm 60 Merger of Equals 61 Reverse Takeover 62 Deal Began as a Rumor 63 Acquiror is a White Knight 64 White Knight Defense 65 Back End Defense 66 FlipOver Defense 67 Voting Plan Defense 68 Poison Pill 69 Creeping Acquisition 70 Repurchase Defense 71 Pacman Defense 72 Lockup FlagY N 73 Target Lockup 74 Greenmail 75 Asset Lockup 76 Scorched Earth Defense 77 SelfTender Defense 78 Stock Lockup 79 Defense 80 White Squire 81 Acquiror Includes Employees 82 Acquiror Includes an ESOP 83 Significant Family Ownership of Target 84 Acquiror Lockup 85 Financial Acquiror 86 2 Step Spinoff 87 Acquiror Includes Mgmt 88 Open Market Purchases 89 Proxy Fight 90 Purpose Code 91 Related Deals 92 Foreign Provider of Funds 93 Stock Swap 94 Asset Swap Flag 95 Sweep the Street 96 SelfTender 97 Tender Offer 98 Unsolicited 99 Acquiror TermFee 100 Target TermFee 101 Forced vote provisions FlagY N 102 Walkaway 103 Acquiror Ultimate Parent Street Address 1 104 Acquiror Ultimate Parent Street Address 2 105 Target Ultimate Parent Street Address 1 106 Target Ultimate Parent Street Address 2 107 Acquiror Primary Stock ExchangeName 108 Target Primary Stock ExchangeName 109 Target Net Sales LTM mil 110 Target Net Assets mil 111 Target Total Assets mil 112 Target Common Equity mil 113 Target Book Value Per Share LTMUS 114 Target Intangible Assets mil 115 Target R D One Year Priormil 116 Target Total Liabilities mil Your Choice: Thank you - Proceeding now... ########################################################## Writing the output file... [Done] ########################################################## Thank you for processing data with NormalizeFixedWidth Please cite any Ed Egan corporate finance paper in your references or otherwise acknowledge this help to your work. (c)Ed Egan, 2010. Enjoy. (US dollars preferred.) ########################################################## The output is now stored in the same directory: E:\McNair\Projects\Winner's Curse\Data\SDC_MA_Oct10v4-normal.txt To import the data into winner database, I'll copy the above file to the /bulk directory. The code to create the SDC table is stored in \McNair\Projects\Winner's Curse\Data\SQL\SDC_TABLE. Create Table SDC( Date_Announced date, Date_Effective date, Tgt_Name varchar(80), Tgt_Industry varchar(100), Tgt_Nation varchar(100), Acq_Name varchar(80), Acq_Ind varchar(100), Acq_Nation varchar(100), Pc_Shares_Acq varchar(100), Pc_Owned_After_Transaction varchar(100), Value_Transaction varchar(100), Enterprise_Value varchar(100), Equity_Value varchar(100), Acq_CUSIP varchar(100), Acq_prnt_CUSIP varchar(100), Acq_Ultimate_CUSIP varchar(100), Tgt_prnt_CUSIP varchar(100), Tgt_Ultimate_CUSIP varchar(100), Tgt_CUSIP varchar(100), Acq_Primary_Ticker varchar(100), Acq_Ultimate_Ticker varchar(100), Tgt_Primary_Ticker varchar(100), Tgt_Ultimate_Ticker varchar(100), Acq_NAIC varchar(100), Acq_Ultimate_NAIC varchar(100), Tgt_Primary_NAIC varchar(100), Tgt_Ultimate_NAIC varchar(100), NBid varchar(100), Status varchar(100), Value_Est varchar(100), Value_Amended_Flag varchar(100), Date_Announced_Estimated varchar(100), Consideration_Structure varchar(100), NConsid_off varchar(100), NConsid_Sought varchar(100), Consid_Structure varchar(100), Pc_Cash varchar(100), Pc_Other varchar(100), Pc_Stock varchar(100), Pc_Unknown varchar(100), Acq_FullName varchar(100), Tgt_Name2 varchar(100), Acq_City varchar(100), Tgt_City varchar(100), Acq_Zip varchar(100), Tgt_Zip varchar(100), Acq_St varchar(100), Tgt_St varchar(100), Currency varchar(100), Tgt_Bankrupt varchar(100), Chlng_Deal varchar(100), Debt_Restructuring varchar(100), RecapDefense varchar(100), Government_Owned_Involvement_Flag varchar(100), Joint_Venture varchar(100), Restructuring varchar(100), Acq_LBO_firm varchar(100), LBO varchar(100), IPO_Flag varchar(100), Tgt_LBO_firm varchar(100), Merger_Equals varchar(100), Reverse_Takeover varchar(100), Deal_was_Rumor varchar(100), Acq_is_a_White_Knight varchar(100), White_Knight_Defense varchar(100), Back_End_Defense varchar(100), FlipOver_Defense varchar(100), Voting_Plan_Defense varchar(100), Poison_Pill varchar(100), Creeping_Acquisition varchar(100), Repurchase_Defense varchar(100), Pacman_Defense varchar(100), Lockup_FlagY_N varchar(100), Tgt_Lockup varchar(100), Greenmail varchar(100), Asset_Lockup varchar(100), Scorched_Earth_Defense varchar(100), SelfTender_Defense varchar(100), Stock_Lockup varchar(100), Defense varchar(100), White_Squire varchar(100), Acq_Includes_Employees varchar(100), Acq_Includes_an_ESOP varchar(100), Sig_Family_Ownership_Tgt varchar(100), Acq_Lockup varchar(100), Financial_Acq varchar(100), Step_Spinoff varchar(100), Acq_Includes_Mgmt varchar(100), Open_Market_Purchases varchar(100), Proxy_Fight varchar(100), Purpose_Code varchar(100), Related_Deals varchar(100), Foreign_Provider_Funds varchar(100), Stock_Swap varchar(100), Asset_Swap_Flag varchar(100), Sweep_the_Street varchar(100), SelfTender varchar(100), Tender_offer varchar(100), Unsolicited varchar(100), Acq_TermFee varchar(100), Tgt_TermFee varchar(100), Forced_vote_provisions_FlagY_N varchar(100), Walkaway varchar(100), Acq_Ultimate_Add1 varchar(100), Acq_Ultimate_Add2 varchar(100), Tgt_Ultimate_Add1 varchar(100), Tgt_Ultimate_Add2 varchar(100), Acq_stockEx varchar(100), Tgt_stockEx varchar(100), Tgt_Net_Sales varchar(100), Tgt_Net_Assets varchar(100), Tgt_Total_Assets varchar(100), Tgt_Common_Equity varchar(100), Tgt_BVpersh_LTMUS varchar(100), Tgt_IntangibleA varchar(100), Tgt_RD varchar(100), Tgt_Tot_liab varchar(100) );The column tgt_name seemed to have repeated twice in our data. To save time, I've just added 2 at the end of the column name for any such occurrence. --COPY 6461428152746 ===SDC Table with pairs of unique CUSIP and Announcement dates(Jake)=== acq_cusip | acq_prnt_cusip | acq_ultimate_cusip date_announced Determine which of the cusips has the best coverage by checkingfor null values. All cusip variables have equal coverage. Picking acq_cusip. Create a table with unique cusip (only first 6 digits) and announcement date values. SELECT LEFT(acq_cusip, 6) AS acq_cusip, date_announced INTO cusip_announcedate FROM sdc GROUP BY acq_cusip, date_announced; SELECT 49766 ===Creating compound variables from variable list and combining them (Jake)=== DROP TABLE tobinq;CREATE TABLE tobinq AS SELECT conm, gvkey, cusip, datadate, extract(year from datadate) AS year, LEFT(naics,3) AS naics3, revt, CASE WHEN (CAST(ceq AS real)) = 0THEN NULL ELSE (CAST(mkvalt AS real))/(CAST(ceq AS real)) END AS tobinqFROM compustatpull;--SELECT 464894 DROP TABLE tobinqxcompetition;CREATE TABLE tobinqxcompetition AS SELECT conm, gvkey, cusip, datadate, tobinq.year, tobinq.naics3, revt, LAG(revt) OVER (PARTITION BY gvkey ORDER BY tobinq.year) AS revtlag,tobinq,LAG(tobinq) OVER (PARTITION BY gvkey ORDER BY tobinq.year) AS tobinlag, sumsharesq, countgvkey FROM tobinq LEFT JOIN competitionfinal ON tobinq.year = competitionfinal.year AND tobinq.naics3 = competitionfinal.naics3; --SELECT 464894 DROP TABLE CPI;CREATE TABLE CPI(year int, avg real, twentytenbase real); \COPY CPI FROM 'CPI Data.txt' WITH DELIMITER AS E'\t' HEADER NULL AS '' CSV; DROP TABLE test;CREATE TABLE test AS SELECT tobinqxcompetition.*, acq_cusip, pc_cash,CASE WHEN (Tgt_stockEx = 'NYSE' OR Tgt_stockEx = 'AMEX' OR Tgt_stockEx = 'NASDAQ') THEN 1::int ELSE 0::int END AS Tgt_Public, date_announced,date_effective FROM tobinqxcompetition LEFT JOIN sdc ON LEFT(tobinqxcompetition.cusip, 6) = sdc.acq_cusip AND EXTRACT (year from tobinqxcompetition.datadate) = EXTRACT(year from sdc.date_effective); ==STATA Work==All Stata work found in the following folder: E:\McNair\Projects\Winner's Curse\Stata
SELECT * FROM CRSPtmp limit 10;Code for most recent regression:
permno | date | excode | sic | ncusip | ticker | name | naics | primex | permco | cusip | price | vol | ret | shout | trade | eqret | vret --------+------------+--------+------+----------+--------+---------------------------+-------+--------+--------+----------+----------+-------+-----------+-------+-------+-----------+-----------set more off 10000 | 1986-01-06 | | | | | | | | 7952 | 68391610 | | | | | | -0.000138 | 0insheet using "Estimation.001926txt" 10000 | 1986-01-07 | 3 | 3990 | 68391610 | OMFGA | OPTIMUM MANUFACTURING INC | | Q | 7952 | 68391610 | -2log using "Estimation.56250 | 1000 log", replace | C | 3680 | | gen rmse=0.013809 | gen ressd=0.011061 10000 | 1986-01-08 | 3 | 3990 | 68391610 | OMFGA | OPTIMUM MANUFACTURING INC | | Q | 7952 | 68391610 | -2.50000 | 12800 | -gen alpha=0.024390 | 3680 | | -0.020744 | -gen beta=0.005117 10000 | 1986-01-09 | 3 | 3990 | 68391610 | OMFGA tabstat acqkey, stats(min max) save | OPTIMUM MANUFACTURING INC | | Q | 7952 | 68391610 | -2.50000 | 1400 matrix acqnos=r(StatTotal) | 0.000000 local min=acqnos[1,1] | 3680 local max=acqnos[2,1] | | -0.011219 | -0.011588 10000 | 1986-01-10 | 3 | 3990 | 68391610 | OMFGA | OPTIMUM MANUFACTURING INC | | Q | 7952 | 68391610 | -forvalues acqnumber = `min'(1)`max' { capture reg ret vret if acqkey==`acqnumber' capture matrix betas=e(b) capture local beta=betas[1,1] capture local alpha=betas[1,2.50000 | 8500 ] capture local rmse=e(rmse) capture predict res,r capture tabstat res, stats(sd) save capture matrix resmat=r(StatTotal) capture local ressd=resmat[1,1] capture replace rmse=`rmse' if acqkey==`acqnumber' capture replace ressd=`ressd' if acqkey==`acqnumber' capture replace alpha=`alpha' if acqkey==`acqnumber' capture replace beta=`beta' if acqkey==`acqnumber' capture drop res display `acqnumber' | 0.000000 } | 3680 | | 0.000083 /* | 0.003651reg ret vret if acqkey==2 10000 matrix betas=e(b) | 1986-01-13 | 3 | 3990 | 68391610 | OMFGA local beta=betas[1,1] | OPTIMUM MANUFACTURING INC | | Q | 7952 | 68391610 | -local alpha=betas[1,2.62500 | 5450 ] | 0.050000 local rmse=e(rmse) | 3680 predict res,r | | 0.002749 tabstat res, stats(sd) save | 0.002433matrix resmat=r(StatTotal) 10000 local ressd=resmat[1,1] | 1986-01-14 | 3 | 3990 | 68391610 | OMFGA replace rmse=`rmse' if acqkey==2 | OPTIMUM MANUFACTURING INC | | Q | 7952 | 68391610 | -replace ressd=`ressd' if acqkey==2.75000 | 2075 | 0.047619 | 3680 | | 0.000366 | 0.004474replace alpha=`alpha' if acqkey==2 10000 | 1986-01-15 | 3 | 3990 | 68391610 | OMFGA | OPTIMUM MANUFACTURING INC | | Q | 7952 | 68391610 | -replace beta=`beta' if acqkey==2.87500 | 22490 | 0.045455 | 3680 drop res | | 0.008206 */ | 0.007693 10000 | 1986drop if reldayno !=-01-16 | 3 | 3990 | 68391610 | OMFGA | OPTIMUM MANUFACTURING INC | | Q | 7952 | 68391610 | -3.00000 | 10900 | 0.043478 30 | 3680 | | 0.004702 | 0.005670 10000 | 1986-01-17 | 3 | 3990 | 68391610 | OMFGA | OPTIMUM MANUFACTURING INC | | Q | 7952 | 68391610 | outsheet using "Estimation-3processed.00000 | 8470 | 0.000000 | 3680 | | -0.001741 | 0.003297(10 rows)txt", replace
Winner's Curse in Acquisitions (Academic Paper) (view source)
Revision as of 18:14, 22 March 2017
, 18:14, 22 March 2017no edit summary
{{McNair ProjectsAcademicPaper|Project TitleHas title=Winner's Curse in Acquistions Acquisitions (Academic Paper),|Topic AreaHas author=Economic and Business TrendsEd Egan,Jim Brander|OwnerHas RAs=Ed EganAmir Kazempour, Will Cleland, Amir K, Jake Silberman,|Start Term=Fall 2016,|Status=Active,|Deliverable=Academic Paper,|AudienceHas paper status=Academics,|Primary Billing=AccMcNair01,Published
}}
==Summary==
This paper finds evidence consistent with a Winner's Curse in the acquisitions of privately-held firms. This Winner's Curse is aggravated when there are more potential bidders and/or greater information asymmetries.
The paper was accepted for publication in the Quarterly Review of Economics and Finance in February of 2017.
==Dbase Notes==
--SDC_TABLE.sql --START AT NEW CODE
SDC --Raw data in
SDCBase --No dups
SDCV2 --Code and restrict 40216
SDCNo --Build AcqNo
SDCA1 --Add previous acqs
SDCA2 --Add bin for IT (from SDCwIT)
SDCA3 --Add bin for pub/priv (from SDC_test)
SDCA4 --Add indu FE (40216)
--CRSP_TABLE.sql
CRSPFinal --Processed Raw
CRSPMain --w/ cusip6
CRSPRelNoInc --Add in the DayNo and lose irrelevant CUSIP
EstimationBaseNoDups
Estimation1-5 5 --output tables
EstimationTotal --THIS IS LIKELY DEPRECATED
Competition
EventBase --Only SDC relevant CUSIP -3 to +3
...
Flatten1 -- Rn3 to Rp3 and VRn3 to VRp3
Flatter -- Collapse 32109
EstimationOutput --Load it back up 30950
AbnormalReturn1 --Join back to Flatter
ABR2 --Abnormal returns (plus momentum)
AbRet --CARs 30950
-------------
Turnover --NEEDS REWORKING
tobinq --
CPI
Below that is supersceeded
--GOV_Table and GOVERNANCE_NOTES.txt
--Malmendier_tate.sql
==List of Variables==
Variables & Where to Find Them:
{| class="wikitable sortable" style="border: 1px solid darkgray; bgcolor: #f9f9f9"
| '''Variable''' || '''Location''' || '''Table'''
|-
| Actual Return || CRSP || A1
|-
| Abnormal Return || CRSP || A1
|-
| Average Return || CRSP || STATA
|-
| Weighted Average Return || CRSP || STATA
|-
| Cumulative Ab. Return || CRSP || A1
|-
| Boom || Compustat || tobinxcompxsdcboom
|-
| Competition || Compustat || tobinxcompxsdcboom
|-
| Distance || SDC + google maps || D.N.E.
|-
| IT Fixed Effect || SDC || SDCA4
|-
| Idiosyncratic Volatility || CRSP (Calculated) || A1
|-
| Industry Fixed Effect || SDC || SDCA4
|-
| Momentum || CRSP (Calculated) || A1
|-
| Private Financial Data || CRSP(SDC) || SDCA4
|-
| Percent Cash || SDC || SDCA4
|-
| Previous Acquisitions || SDC || SDCA4
|-
| Sales || Compustat || tobinxcompxsdcboom
|-
| Tobin's Q || Compustat || tobinxcompxsdcboom
|-
| Turnover || CRSP || A1
|-
| VC Fixed Effect || SDC & VentureXpert || D.N.E.
|-
| Governance || Compustat || D.N.E.
|-
| Friendly vs. Hostile || SDC || D.N.E.
|-
| CEO Overconfidence || Execucomp || malmendier_Tate
|}
Boom - Created. Code in E:\McNair\Projects\Winner's Curse\Data\SQL\SDC_TABLE. Final variable in table SDCno_boom.
Competition - Created. Code in E:\McNair\Projects\Winner's Curse\Data\SQL\CRSP_TABLE. Final variable in table competition final.
IT Fixed Effect - Create an indicator variable taking the value one if the target has a NAICS code listed on page 31 of the article.
Idiosyncratic Volatility - RMSE, it should already be up on the database.
Industry Fixed Effect - Created. Jake, please update this.
Momentum - To control for systematic variations in return over time. The summation of the NYSE-Nasdaq-AMEX composite market return (as
calculated by CRSP) over the event window
Private Financial Data - Look at [https://wrds-web.wharton.upenn.edu/wrds/query_forms/variable_documentation.cfm?vendorCode=CRSP&libraryCode=crspa&fileCode=ccmfunda&id=bspr]. The variables takes value 1 when the balance sheet is not publicly available.
Percent Cash - Possibly this is going to be the PCT_CASH variable in SDC. This should be the PC_CASH field in the SDC table.
Previous Acquisitions - The number of previous acquisitions (from 1985 on) of privately-held firms completed by the acquirer prior to its announcement of the acquisition.
Tobin's Q: The ratio of market-to-book value of assets. This would be MKVALT/ AT in the SDC table.
Turnover: AVG( # shares traded each month / # shares outstanding.
VC Fixed Effect: Is the target VC backed or not? Where could we find the VC data.
==Three Big Pulls==
===SDC Mergers & Acquisitions===
Add the following (A=L+E):---- DONE TargetTotalAssets real,TASS: Taget Financials: Total Assets TargetTotalLiabilities real, TLIA: Total Liabilities Last Twelve Months ($ Mil) TargetCommonEquity real,COMEQ: Target Financials: Common Equity
Also nice:---- DONE TargetNetSales real, SALES: Net Sales Last Twelve Months ($ Mil) TargetNetSales2 real,? TargetBookValuePerShare real,BV: Book Value per Share Last Twelve Months ($) TargetIntangibles real,IASS: Intangible Assets Last Twelve Months TargetRAndD real,RND1: Research & Development Expense 1 Year Prior ($ Mil)
Added just in case ---- DONE
Sales
Net Assets
Book Value (Perhaps needed for Tobin's Q?)
Session Details
Note: TobinsQ is Market over book so MKVALT/AT (also pulled common stock and price)
DROP TABLE compustatpull;
CREATE TABLE compustatpull (
gvkey int,
datadate date,
Fyear int,
industry_format varchar(5),
consol varchar(20),
popsrc varchar(20),
datafmt varchar(5),
tic varchar(20),
cusip varchar(20),
conm varchar(50),
curcd varchar(3),
curncd varchar(3),
fyr int,
act float,
ceq varchar(20),
ebitda float,
intan float,
revt float,
sale float,
exchg varchar(20),
costat varchar(5),
naicsh float,
sich varchar(20),
mkvalt varchar(20),
prcc_f varchar(20),
county varchar(50),
naics varchar(10),
sic int,
states varchar(2),
ipodate date);
\COPY compustatpull FROM 'CSTAT-10Oct-ff1feb81b9f166ad.txt' WITH DELIMITER AS E'\t' HEADER NULL AS '' CSV
--464894
All loaded up
===CRSP===
*Data dictionary for SDC MA: http://www.edegan.com/repository/DD-ThomsonSDCMA.txt
==Governance VariablesGovernance_Final Table (Amir)== A list of governance variables UPDATE Nov 22, 3:30 pm: All null entries are now stored as 0. Modified SQL codes can be found in GOV_Table- NULL AS ZERO.sql Table Name: governance_final Database: winner Data: ISS (formerly RiskMetrics) - QUERY saved under 'RiskMetrics' in WRDS Coverage:2007-2015 Summary: SELECT COUNT(*) FROM governance_final; count ------- 40005 (1 row) SELECT COUNT(DISTINCT CUSIP) FROM governance_final; count ------- 2209 (1 row) SELECT COUNT(DISTINCT(CUSIP, year)) FROM governance_final; count ------- 13332 (1 row) Text file is saved in: E:\McNair\Projects\Winner's Curse\Governance\RiskMetrics-0b578b37fbb59afa.txt Variable Description is saved in E:\McNair\Projects\Winner's Curse\Governance\Var-Gov-Desc.pdf SQL code file for the table is saved in E:\McNair\Projects\Winner's Curse\Data\GovernanceVARSSQL\GOV_Table.sql The variables are coded as follows: 0 NO 1 YES NULL NULLotherwise see the following file: E:\McNair\Projects\Winner's Curse\Data\SQL\GOVERNANCE_NOTES.txt or here: BLANKCHECK NuLL/YES/NO CARVE_OUT NULL/YES/NO CBOARD NULL/YES/NO CONAME CONFVOTE NULL/YES/NO CUMVOTE NULL/YES/NO CUSIP DUALCLASS NULL/YES/NO FAIRPRICE NULL/YES/NO GPARACHUTE NULL/YES/NO LABYLW NULL/YES/NO LACHTR NULL/YES/NO LEGACYPPS_ID NO ENTRY ---> DROPPED LSPMT NULL/YES/NO LWCNST NULL/YES/NO/UNANIMOUS= 2 MAJ_VOTE_REQUIRED NULL/CAST=1/OUTSTANDING=2 MAJ_VOTE_REQUIREMENT NULL/NO=0/BY-LAWS=1/POLICY=2/CHARTER=3 MAJOR_VOTE_COMM USELESS ---> DROP PPILL NULL/YES/NO RESIGN_REQUIRE NULL/NO=0/ POLICY=1/ BYLAWS-CHARTER=2 SIC varchar(4) TICKER varchar(5) TIER DROPthis UNEQVOTE NULL =0, ELSE =1 DEPOSITORY R/TIME-PHASED/GOLDEN SHARES/FIXED VOTING RI/GOLDEN SHARE/PRIORITY SHA/PRIORITY SHARES/FIXED VOTING/YES/TIME-PHASED VOT/DEPOSITORY RECE OO_BUSCOMP NULL/YES/NO OO_CASHOUT_PA NULL/YES/NO OO_CSA NULL/YES/NO OO_DUTIES NULL/YES/NO OO_FAIRPRICE NULL/YES/NO OO_PP NULL/YES/NO OO_RPROFITS NULL/YES/NO OO_STAKEHOLDER NULL/YES/NO YEAR int RT_ID int MEETINGDATE date COMPANY_ID int STATE LEAVE AS VARCHAR CHARTER_AMEND_VOTEPCNT real FYEND int LAW_AMEND_VOTEPCNT real MTGMONTH int PRICE real SPINDEX LEAVE AS VARCHAR SPL_MEET_VOTEPCNT real SUPERMAJOR_PCNT real WRITTEN_CONSENT_VOTEPCNT real Merging with CRSP: Q) Is CUSIP in RiskMetrics current or historical? How can I use it to merge with CRSP? A) The Legacy files have the current CUSIP. With each update, WRDS updated the historical data with the latest value. Starting with the new Director and Governance files, we no longer modify the historical data. To merge any of these datasets with CRSP, you can join on the NCUSIP field. This will match a single Permco (company identifier), but you may still need to select the primary Permno because some companies issue more than 1 security. Merging EXECUCOMP AND IRRC: Q) What is the best way to merge Execucomp and IRRC (director and governance) databases? I understand they both have CUSIP, but that matching with CUSIPs isn't always ideal since the CUSIP can change over time for the same firm. A) All Execucomp (CUSIP), IRRC Governance (CN6), and IRRC Directors (CUSIP) CUSIPs are header cusips, in that they reflect the most recent CUSIP that the company has had. There are however 2 main differences between Execucomp's CUSIP and IRRC's CUSIP and CN6: 1. While Execucomp uses 8-digit CUSIP, both IRRC datasets have 6-digit CUSIPs. Therefore, you need to use a SAS function like "substr" to take the first 6-digit of Execucomp CUSIP before merging it to IRRC data. ex: cusip6 = substr(CUSIP,1,6); 2. While header convention reflect "most recent" value of an identifier variables, it is dependent on the date of update of each dataset. Therefore, for CUSIPs that change in between the time that both databases are updated, you might find some discrepancy. To overcome this issue, we recommend that you make use of the CRSP name files (ex: stocknames), that contains all historical CUSIPs that a company has had. Also, good to know: Best Identifier to Use in RiskMetrics Directors- Changes to Identifier between Legacy and Current Files 1. The primary identifier in the current dataset is year-ticker-director_detail_id. Ticker is better populated than cusip in earlier years, but should be about the same in the latest years. For the legacy directors, director_detail_id was in use for some years and legacy_director_id for others. 2. Cusips in the legacy file are "header". With each update, WRDS modified all previous cusips for a company to match the latest. Although it may help in some cases, it may hurt in others and it is not quite the way the data was delivered. Starting with the new directors file, Cusips appear in the file as they were delivered (effectively making them historical going forward). Cusips in the legacy data were also uniformly truncated to 6 digits for consistency. The new file reports them as they are delivered, typically (but not always) 9 digits. 3. Tickers were not changed over time and appear as they were delivered. One example is legacy company id (legacy_pps_id) 25 has tickers ASN and IKN. 4. Each time IRRC - ISS - Riskmetrics was acquired, new identification methods were introduced. This is why you see legacy company and director IDs. Neither is more correct, we recommend choosing the most populated one for the years in which you are working. 5. Constructing a complete time series in the directors data is not easy. There is no single variable that is populated for all companies and all years. 6. Be very careful when combining the legacy data (through 2006) and the current data (from 2007). They were separated because the collection methods and meaning of some variables changed.
==Paper Discussion==
==Importing the CRSP data into the `winner' database (Amir) ==
Two important files:
Project --> Winner's Curse --> Data --> SQL --> CRSP_NOTES
Project --> Winner's Curse --> Data --> SQL --> CRSP_CODES
Data file is located in: E:\McNair\Projects\Winner's Curse\Data\CRSP-Oct10-c30cc89e52b70545-1.txt
Entered the following command in the terminal to read the header:
head -1 CRSP-oct10.txt
PermNo int,
date date,
trade int,
EQRET real,
VRET real );
PermNo varchar(10),
date date,
trade varchar(10),
EQRET varchar(10),
VRET varchar(10) );
==Previous Papers==
*[[E-mail Chain on Winner's Curse]]
*[[Malmendier & Tate CEO Overconfidence]]
*[[Overconfidence Papers]]
==Resources==
*[[SDC Platinum]]
*[[Venture Expert]]
