英文文献：ICT, Information Asymmetry and Market Power in the African Banking Industry-ICT、信息不对称和非洲银行业的市场力量
英文文献作者：Simplice Asongu,Nicholas Biekpe
英文文献摘要：
This study assesses how market power in the African banking industry is affected by the complementarity between information sharing offices and information and communication technology (ICT). The empirical evidence is based on a panel of 162 banks consisting of 42 countries for the period 2001-2011. Four estimation techniques are employed, namely: (i) instrumental variable Fixed effects to control for the unobserved heterogeneity; (ii) Tobit regressions to control for the limited range in the dependent variable; and (iii) Instrumental Quantile Regressions (QR) to account for initial levels of market power. Whereas results from Fixed effects and Tobit regressions are not significant, with QR: (i) the interaction between internet penetration and public credit registries reduces market power in the 75th quartile and (ii) the interaction between mobile phone penetration and private credit bureaus increases market power in the top quintiles. Fortunately, the positive net effects are associated with negative marginal effects from the interaction between private credit bureaus and mobile phone penetration. This implies that mobile phones could complement private credit bureaus to decrease market power when certain thresholds of mobile phone penetration are attained. These thresholds are computed and discussed.

本研究评估了信息共享办公室与信息和通信技术(ICT)之间的互补性如何影响非洲银行业的市场力量。实证证据是基于2001-2011年由42个国家的162家银行组成的小组得出的。采用了四种估计技术，即(i)工具变量固定效应来控制未观察到的异质性;(ii) Tobit回归以控制因变量的有限范围;(iii)工具分位数回归(QR)来解释市场力量的初始水平。虽然固定效应和Tobit回归的结果并不显著，但QR: (i)互联网普及率和公共征信登记机构之间的相互作用降低了75分位数的市场力量，(ii)移动电话普及率和私人征信机构之间的相互作用增加了排名前五分位数的市场力量。幸运的是，积极的净效应与负面的边际效应之间的互动，私人信贷机构和移动电话的渗透。这意味着，移动电话可作为私人信用机构的补充，在达到一定的移动电话渗透门槛后降低市场力量。对这些阈值进行了计算和讨论。