Để examinethisempiricalissue,wecollectinterimreportingfrequencydataforthetimeperiod1951–1973.TheSEC
required annualfinancialreportingin1934andraisedtherequiredreportingfrequencytosemi-annualreportingin1955.
không until1970didtheSECmandatequarterlyreporting.However,priorto1970asubstantialproportionoffirmsreported
more frequentlythanrequiredbytheSEC.1 ví dụ, Butler etal.(2007) tài liệu thatatleast70% offirmsreported
intheperiodweexamine hàng quý.Byofferingsubstantialcross-sectionalandtime-seriesvariationinreporting
tần số, oursampleperiodprovidesanidealsettingtoinvestigateourresearchquestion.Itisdifficulttostudyour
nghiên cứu questionusingmorerecentdataintheU.S.because,since1970,almostallfirmshavefollowedtheSEC's
requirement ofquarterlyreporting,resultinginalackofvariationinreportingfrequency.
trong oursampleperiod, asignificantproportionoffirmsvoluntarilychoosetoreportmorefrequentlythantheSEC
đòi hỏi. Theirdecisiononreportingfrequencyisnotlikelytoberandom.Thus,itispossiblethatsomeunobservablefirm
characteristics, suchasthefirm'sriskiness, affectbothobservedreportingfrequencyandinformationasymmetry/costof
vốn chủ sở hữu, givingrisetoanendogeneityconcern.Toalleviatethisconcern, inadditiontoasimpleOLSregression, weusethe
sau threeapproaches — một firmfixedeffectsmodel, atwo-stageleastsquaresestimationprocedure (2SLShereafter),
và amatchedcontrolsample.
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