Vertical restraints and exclusivity纵向约束与垄断.ppt

Vertical restraints and exclusivity纵向约束与垄断.ppt

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CompetitionPolicyinTwo-SidedMarkets

-SomebriefremarksDrAmeliaFletcherChiefEconomistOfficeofFairTradingLEARConference

7thJune2007NBTheviewsexpressedherearemyown,andnotnecessarilythoseoftheOFT

Whatdocertainkeyfactorsof2-sidedmarketsmeanfor:Marketdefinition?Predation?Collusion?Exclusivecontracts?Mediaregulationandmergers?

2-sidedmarkets:FirstkeyfactorInatypical2-sidedmarket:DAisfunctionnotonlyofpAbutalsoofqBDBisfunctionnotonlyofpBbutalsoofqAWhatdoesthismeanformarketdefinition?

MarketdefinitionSSNIPtest:Couldahypotheticalmonopolistprofitablysustainasmallbutsignificantandnon-transitoryincreaseinprice?Ifno,therelevantantitrustmarketmustbewiderIfyes,themarketisnotanywider(butcouldbenarrower)Keyquestionfor2-sidedmarkets:Whichfeedbackloopsshouldbetakenintoaccount?

Marketdefinition:FeedbackloopspA↑qA↓πA↑πA↓πA↑NormalMarket:DoestotalπA↑?Ifyes,marketnowider?

Marketdefinition:FeedbackloopspA↑qA↓DB↓qB↓πA↑πA↓πB↓ForgivenpBπA↑NormalMarket:DoestotalπA↑?Ifyes,marketnowiderFeedbacktomarketB

Marketdefinition:FeedbackloopspA↑qA↓DB↓qB↓πA↑πA↓πB↓ForgivenpBπA↑NormalMarket:DoestotalπA↑?Ifyes,marketnowiderFeedbacktomarketBShouldwe

takethisintoaccount?

Marketdefinition:FeedbackloopspA↑qA↓DB↓qB↓DA↓qA↓πA↑πA↓πB↓πA↓ForgivenpBForgivenpAπA↑NormalMarket:DoestotalπA↑?Ifyes,marketnowiderFeedbacktomarketAFeedbacktomarketB

Marketdefinition:FeedbackloopspA↑qA↓DB↓qB↓DA↓qA↓πA↑πA↓πB↓πA↓ForgivenpBForgivenpAπA↑NormalMarket:DoestotalπA↑?Ifyes,marketnowiderFeedbacktomarketAFeedbacktomarketBShouldwe

takethisintoaccount?

Marketdefinition:FeedbackloopspA↑qA↓DB↓qB↓DA↓qA↓πA↑πA↓πB↓πA↓ForgivenpBForgivenpAπA↑NormalMarket:DoestotalπA↑?Ifyes,marketnowiderpB↓qB↑πB↓ProfitsdissipatedinmarketBFeedbacktomarketAFeedbacktomarketBShouldwe

takethisintoaccount?

Marketdefinition:FeedbackloopspA

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