Tham khảo tài liệu 'quantitative techniques for competition and antitrust analysis by peter davis and eliana garcés_6', khoa học xã hội, kinh tế chính trị phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 198 4. Market Definition To help inform the analysis of the large amount of survey evidence considered in that case a summary of tire evidence is presented in table . In particular note that the results of four separate surveys are reported. The surveys are called respectively Swift 1 ORC Swift 2 and GfK after the survey companieswhichundertookthem. The first two surveys were addrensaPShwarhyysPoeea-swho huarecenttysaopped playing with a provider lapsed auatomrrsi whilrtnnseuonOOwo cuaveysinuhlved current customers. In terms of the latter pair of Mine vs. the Swifto eurveyaslhhtcoiisumCTn direcsle how they would respond to a 10 peiar ivcrense29 whttethe GfK swvey usrd vhow-cards to allow consumers to comoarehypotyetiral product offerings. The cc has found that directly asking consumes oyoutwtlai-huy woutd doit prices nvviil up by 10 can sometimes lead to retvlltfiiat hedtffinuletomteiT et. Showd-dt van also sometimes produce surprisingtrseltp. hv ceaihkk. rne aartnCtheGfKeurvey used show-cards and suggested ihfehastno demand nchaduies Surveys aimed at capturing diversion rntiotkimtkdinuntlyeotimase the nobttiiUi tion effect between two produc-niTresemkthodshhvu fiiemrsit ttiasthry addrect directly the issue of interest in msadeSdefini-ior nah makeSew leaoscll er hasymp-tions. But they are heavily reliant onfood-qnality dataobf ained tio-ouihi htpli-quality surveys. Survey design in this area remainiunVsudovelopmeni. Wherever our information on i ubsniietieh pattered comusfram poruehsoedsmane estimation we will of course stilleaed thueu e-at ieSnrmetiosta evaruatdthfimeor-tance of rival products as constrhĩosson priau-shSting set-ion wh discuss strategies that can be used beUlquontìtatidely whenwrhavegsee-qualiiy data but also sometimes qualitativkly Wkdo setveOiiai turn briefly to ono additional tochihqdk somntimhsusnSui for peorreehto aaaskei definition. Using Shipment Data foa GeiigeaphreMarke ohekmn Elzingkr and Hogarty
