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Quantitative Techniques for Competition and Antitrust Analysis by Peter Davis and Eliana Garcés_10

Tham khảo tài liệu 'quantitative techniques for competition and antitrust analysis by peter davis and eliana garcés_10', khoa học xã hội, kinh tế chính trị phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 338 6. Identification of Conduct econometric model but it can also be helpful when collecting other evidence in a given case e.g. documentary evidence . On the other hand such at observatton may concern US since we noted earlier that on occasion cartels have often resulted in relatively less variation in prices perhaps because ofstability concerns.AsCorts 1999 noted a different model of collyctonwoulChaeedifferent imeticationsCos observed collusive prices. Ổ.2.4.2 Identification ofPricingandDemandEoACtions inDiffoAeeSiaSeOMorCeSa In a fashion entirely analogous toccefemegeeeous products case the identification of conduct generally requires that the parameters of the demand and pricing equations are identified. Even if demand rotation canalso be usedtoidentifyconduct in differentiated industries in the same way as tee aicioi-lsoiDoronnoiriweolicSc. demand does need to be estimatoA tooaeb rmoet íìlidaeĩstsunanS oi í . TStsereeeets a challenge because a differentiatodproeuatinOuelry has one demand sCiiycoiibroiy pricing function for each of the proaAA-sbeiynsotd.Snconerast ic lie homogyeeeus product case there is only one merkol aomaddanC cee market suppidcurve that need to be estimated. Now we winnieo to e-eire-e as iniiiio demaTdauentioas as there are products and also as manogAcíng cdAOticysasthnceacaproducis. eoea-tification naturally becomes moreasescuiein rille ccsoeeddemesestrlctieydwiil have to be imposed in order to make filo ccaiysirircatablo. We dincusddiafesentiated product demand estimation extenetveSyinchasbae y. A general principle for identificetittoofync iineacsystem oioquationsis toat the number of parameter restrictions on ocsSi equaCansC01Cd oe equarto orgreater than the number of endogenous vcrlcbSesiechlaee te tht eqeation. Ano dlirizTSSen restriction is always imposed in AesdecifiTatienof ceoeduatiynso in deacdey the number of additional restriotiensmust WsWuIos eemeseihaotCynumber ol endogenous variables less one 4rThsrtsceuicaSentia saymctfwt