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Web"],"published-print":{"date-parts":[[2018,8,31]]},"abstract":"<jats:p>In location-based social Q8A services, people ask a question with a high expectation that local residents who have local knowledge will answer the question. However, little is known about the locality of user activities in location-based social Q8A services. This study aims to deepen our understanding of location-based knowledge sharing by investigating the following: general behavioral characteristics of users, the topical and typological patterns related to geographic characteristics, geographic locality of user activities, and motivations of local knowledge sharing. To this end, we analyzed a 12-month period Q8A dataset from Naver KiN \u201cHere,\u201d a location-based social Q8A mobile app, in addition to a supplementary survey dataset obtained from 285 mobile users. Our results reveal several unique characteristics of location-based social Q8A. When compared with conventional social Q8A sites, users ask and answer different topical\/typological questions. In addition, those who answer have a strong spatial locality wherein they primarily have local knowledge in a few regions, in areas such as their home and work. We also find unique motivators such as ownership of local knowledge and a sense of local community. The findings reported in the article have significant implications for the design of Q8A systems, especially location-based social Q8A systems.<\/jats:p>","DOI":"10.1145\/2983645","type":"journal-article","created":{"date-parts":[[2018,7,17]],"date-time":"2018-07-17T12:45:12Z","timestamp":1531831512000},"page":"1-33","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":4,"title":["Localness of Location-based Knowledge Sharing"],"prefix":"10.1145","volume":"12","author":[{"given":"Sangkeun","family":"Park","sequence":"first","affiliation":[{"name":"KAIST, South Korea"}]},{"given":"Mark S.","family":"Ackerman","sequence":"additional","affiliation":[{"name":"University of Michigan, USA"}]},{"given":"Uichin","family":"Lee","sequence":"additional","affiliation":[{"name":"KAIST, South Korea"}]}],"member":"320","published-online":{"date-parts":[[2018,7,17]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.1145\/1367497.1367587"},{"volume-title":"Urban Land Use Planning","author":"Berke Philip","key":"e_1_2_1_2_1","unstructured":"Philip Berke and Edward John Kaiser . 2006. 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