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  • Wang, Qi  (2)
  • Economics  (2)
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  • Economics  (2)
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  • 1
    Online Resource
    Online Resource
    SAGE Publications ; 2019
    In:  Production and Operations Management Vol. 28, No. 10 ( 2019-10), p. 2533-2551
    In: Production and Operations Management, SAGE Publications, Vol. 28, No. 10 ( 2019-10), p. 2533-2551
    Abstract: This study investigates a novel mechanism—multiple‐winner award rules—that are widely used in e‐procurement auctions and crowdsourcing sites. In many e‐procurement auctions, the auctioneer (i.e., the buyer) specifies three rules before the auction starts: (i) the size of the finalist set (from which the winner[s] will be chosen); (ii) the number of winners; and (iii) the allocation of the contract among the winners. We examine how these three rules affect auction performance using a dataset of online procurement auctions across a variety of product categories. We find that the multiple‐winner award rules significantly impact the suppliers’ participation decisions, which is an important factor in determining the economic performance of the auction (i.e., buyer's savings). Most interestingly, these three rules systematically induce opposite effects on auction participation for two types of suppliers: experienced and inexperienced bidders. For example, increasing the number of winners encourages experienced suppliers, but discourages inexperienced suppliers from participating in the auction. On the other hand, raising the disparity in the contract allocation among winning bidders (e.g., from 50/50 to 90/10 split) deters experienced suppliers, but motivates inexperienced suppliers to participate. These findings provide guidelines for industrial buyers and crowdsourcing hosts on how to effectively make use of multiple‐winner design levers to promote suppliers’ participation when designing procurement auctions and crowdsourcing contests.
    Type of Medium: Online Resource
    ISSN: 1059-1478 , 1937-5956
    RVK:
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2151364-8
    detail.hit.zdb_id: 1108460-1
    SSG: 3,2
    Location Call Number Limitation Availability
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  • 2
    Online Resource
    Online Resource
    Wiley ; 2016
    In:  Mobile Information Systems Vol. 2016 ( 2016), p. 1-11
    In: Mobile Information Systems, Wiley, Vol. 2016 ( 2016), p. 1-11
    Abstract: Recently, Bluetooth-based indoor positioning has become a hot research topic. However, the instability of Bluetooth RSSI (Received Signal Strength Indicator) promotes a huge challenge in localization accuracy. To improve the localization accuracy, this paper measures the distance of RSSI vectors on their low-dimensional manifold and proposes a novel positioning method IWKNN (Isomap-based Weighted K -Nearest Neighbor). The proposed method firstly uses Isomap to generate low-dimensional embedding for RSSI vectors. Then, the distance of two given RSSI vectors is measured by Euclidean distance of their low-dimensional embeddings. Finally, the position is calculated by WKNN. Experiment indicates that the proposed approach is more robust and accurate.
    Type of Medium: Online Resource
    ISSN: 1574-017X , 1875-905X
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2249294-X
    detail.hit.zdb_id: 2187808-0
    Location Call Number Limitation Availability
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