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Introduction
17
theverificationoftheresearchhypothesesputforward.Teconductedstudyallows
tocorroboratethemainhypothesisaswellasalltheancillaryhypotheses.
Datasource
Teapplicationoftheresearchmethodsdescribedintheintroductionandemployed
inthepresentedanalysisencounteredanumberoflimitations.Tosecanbelisted
i.a.intothefollowingcategories:sourceofdata;levelofdataaggregation;result
calculationmethodology-researchtechniquesandmethods;timeseries;adopted
simplifications.
Temainsourceofprimarydataforthestatisticalanalysisdescribedinthe
empiricalpartofthethesiswastheEuropeanStatisticalOfce(Eurostat).Tatana-
lyticalbodyoftheEUoperatesonthebasisoftheprinciples,rulesandguidelines
establishedundertheSingleEuropeanActin1987.Teauthoritypreparesforecasts
andstatisticalanalysesconcerningtheEUMemberStatesandtheEFTA,whichare
vitalformakingdecisionsbytheCommunityauthorities,coordinatesandmonitors
activitiesofnationalstatisticalofcesinordertounifythesurveymethodsused
bythem,andconsolidatesnationalstatisticsofMemberStates.Tepowersofthe
EurostatalsocompriseanalysingandforecastingdevelopmenttrendsintheEU.
TeBrusselsdataportaloftheEurostatpublishestheonlinedatabaseEasyC-
omext(http://epp.eurostat.ec.europa.eu/newxtweb),whichservedasthefundamental
sourceofdataforthemainstatisticalanalysis,i.e.theexaminationofchangesin
intra-industrytradeintensity(theGrubel-Lloydindex)andthestudyoftheprice
andqualitystructureofintra-industrytrade,i.e.theanalysisofparticulartypesof
two-waytrade(GHMindicesreflectingsharesofspecificIITtypesintotaltrade).
Additionaldatausedparticularlyintheanalysisofthemaintrendsinthe
EU-10foreigntrade,withtheresultspresentedinChapter3,wereretrievedfrom
theEurostat-DataExplorer(http://ec.europa.eu/eurostat/data/database).
Relyingonthemethodologicalguidelinesdescribedinsub-chapter2.5with
regardtomethodsforthemeasurementofintra-industrytradeandtakingaccount
ofthescopeandobjectivesoftheanalysisconducted,thestudyofintra-industry
competitiveness(Chapters4and5)wascarriedoutbasedonIITandGHMindi-
cescalculatedonthebasisofdataregardingthevalueandvolumeofexportsand
importsatthelevelof6-digitCNcodes.Itcorrespondstothetheoreticalnotionofan
industryandsatisfiestheconditionthatonlythedeepestpossibledisaggregationof
dataensurescomparabilityofthesameproductsandcanestablishtheactualdegree
ofmatchingexportsandimports,i.e.thereallevelofintra-industrytradeintensity.
AdvancedMicrosofOfceEXCELformulaswereusedforthecomputationof
IITandGHMindices.Teresearchmethodsandtechniquesnecessarytoappropri-
atedataprocessinghavebeendevelopedinthecourseoftheauthor’sprofessional
andscholarlyexperiencegainedintheimplementationofanalyticalprojects,in