TY - UNPD A1 - Gomber, Peter A1 - Sagade, Satchit A1 - Theissen, Erik A1 - Weber, Moritz Christian A1 - Westheide, Christian T1 - Competition/fragmentation in equities markets: a literature survey : [version november 2013] T2 - SAFE working paper series ; No. 35 N2 - Advances in technology and several regulatory initiatives have led to the emergence of a competitive but fragmented equity trading landscape in the US and Europe. While these changes have brought about several benefits like reduced transaction costs, regulators and market participants have also raised concerns about the potential adverse effects associated with increased execution complexity and the impact on market quality of new types of venues like dark pools. In this article we review the theoretical and empirical literature examining the economic arguments and motivations underlying market fragmentation, as well as the resulting implications for investors' welfare. We start with the literature that views exchanges as natural monopolies due to presence of network externalities, and then examine studies which challenge this view by focusing on trader heterogeneity and other aspects of the microstructure of equity markets. T3 - SAFE working paper - 35 KW - Market Structure KW - Competition KW - Fragmentation KW - Liquidity KW - Market Quality Y1 - 2013 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/32479 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-324797 UR - http://ssrn.com/abstract=2362216 IS - version november 2013 PB - SAFE CY - Frankfurt am Main ER -