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12
Introduction
theytakeanyaccountoftheefectsofaccession(theeliminationofbarriersinthe
singlemarket)onintra-industrytrade.Tepresentedanalysismayallowtobridge
thoseimportantgapsinpriorresearchinvestigations.
Inansweringthequestionwhyanalysesofintra-industrytradeareconducted
itmustbepointedoutthatthephenomenonissignificantlylinkedwiththepro-
cessesoftradeliberalisation,regionalintegrationandstructuraleconomicreforms
incountriesintransition.Asdemonstratedbythemainapproachestothefun-
damentalsofeconomiccompetitivenesstheory,intra-industrytradeindicesrank
amongvitalquantitativemeasuresofthecompetitiveposition(Misala,Pluciński
2000).Temodernworldeconomyfacilitatesstructuralchangesandcompetitive-
nessimprovementswhencountriesimplementpoliciesofeconomicliberalismand
theopeningupofeconomies(Ozawa1992).Tradeliberalisationtriggersstructural
transformations,whereasintra-industrytrademeasuresthescopethereof.Such
structuralchangesseemtoberelativelylesscostlywhentradeowscreatedare
intra-ratherthaninter-industryinnature(Balassa1966).Itmayreflectthecrucial
importanceoftwo-waytradeasanindicatorofthedegreeofnecessarystructural
transformationsintradeliberalisation(Bijak-Kaszuba2003).Teintra-industry
tradeindexmayalsobeamajorfactorreflectingthedegreeofrealadjustmentsto
therequirementsofthesinglemarket(Molendowski2007).Furthermore,analysing
thetypesofintra-industryspecialisations,thusthepriceandqualitystructureofIIT
(ofverticalandhorizontaltrade),mayhelpassessthecompetitivenessdevelopment
stageofaneconomy(Porter1990).
Inrecentyears,thebaseforthedevelopmentofforeigntradehasshifedtowards
IRSandadvantagesinproductioncostsofdiferentiatedgoodsinconditionsof
factormobility(Bożyk,Misala2003).TeshareofIITintotaltradecanbetreated
asanempiricaldeterminantoftheprevailingtypeoftrade,withinthemeaningof
theH-OtheoryorinaccordancewithIRS.Inaddition,IITindicescanbeusedto
measurethedevelopmentlevelofcountriesengagedintwo-waytrade.
Intra-industrytradehasconsiderablygainedinimportanceinindustrialised
countriessincethephenomenonwasdescribedbyB.Balassa(1966)andP
.Verdoorn
(1960)fortheEECcountriesinthe1960s.Terefore,itseemsvitaltoobservethe
processesoftheadaptationoftheNMS(theEU-10)totheinternalsinglemarket
oftheEUwithregardtotheintensificationoftheintra-industrydivisionoflabour.
Tisisofimportance,asthereisarelationshipbetweentheintensityofthepar-
ticipationoftheeconomyofacountryoragroupofcountriesintheinternational
divisionoflabourmeasuredbythelevelofintra-industrytradeandtheefciency
ofallocatedfactorsofproduction.Exportsandimportsbasedonthecomplemen-
tarityofeconomies(RCA)mayimposenaturalself-limitationsonthedevelopment
ofmutualtradeand,consequently,maybethemaincauseoftheopportunitycost
intheenlargedEUmarket.Greatersubstitutionexpressedintheintensification
ofIITshouldstrengthenthepositiveefectsobtainedbythecountriesinvolved
inthemostadvancedstageofintegration.Itmayalsobeconductivetoincreased