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排序方式: 共有394条查询结果,搜索用时 15 毫秒
81.
We examine the impact of the Nigerian government’s Treasury Single Account (TSA) policy to withdraw the funds of Ministries, Departments and Agencies from commercial banks. Following the economic policy uncertainty theory, we use an event study methodology to measure the impact of the TSA policy on the shareholders’ wealth. Our results reveal that the announcements and subsequent final implementation of the TSA policy caused negative abnormal returns and losses on the wealth of the commercial banks’ shareholders. This article contributes to the literature on stock market reaction to policy announcements and the unintended consequences government policy can have in an emerging economy.  相似文献   
82.
金融市场有效性争议至今没有定论,中国股票市场有效性判断仍有争议。本文从突发性重大污染事件冲击角度,通过行业板块受突发事件冲击后股票价格在H股与A股两个市场应急反应的对比分析,考察我国股票市场的有效性状况,发现H股表现出的反应不足甚于A股,表明我国股票市场已存在短期动量效应,能在一定程度上对当前公开信息作出反应;但这种反应是不足和滞后的,还未达到半强式有效。可见,我国股票市场处于发育初期,公司治理结构政府主导和环境管制不力等综合因素导致了行业板块股价的特殊走势。  相似文献   
83.
通过理想气体反应等温方程和标准态转换,给出了摩尔反应热力学能、摩尔反应焓、标准摩尔反应亥姆霍兹函数和标准摩尔反应吉布斯函数在等温、等客条件下使用不同标准态时的另一组转换关系式,加上已经给出的在等温、等压条件下使用不同标准态时几个热力学函数间的转换关系式,使这类关系式更全面、完整.对这些关系式的应用条件以及在热化学和基元...  相似文献   
84.
股指期货减弱了A股市场股价同步性了吗?   总被引:2,自引:0,他引:2  
本文在考察A股市场股价同步性与沪深300股指期货推出公告的市场反应的相关关系基础之上,检验了沪深300股指期货对股价同步性的影响。发现证监会批准沪深300股指期货前股价同步性越高的股票对沪深300股指期货批准公告的市场反应越好。基于股指期货通过机构投资者和上市公司市值管理影响上市公司股价同步性的推理,本文进一步的实证发现,机构持股比例越高股价同步性越低,并且这种关系随着股指期货的推出得到加强。  相似文献   
85.
王涛  韩士田 《河北工业科技》2007,24(3):206-208,221
研究了meso-四(4-甲氧基-3-磺酸钠基苯基)卟啉与铅的显色反应:不需加热即可完成络合,表观摩尔吸光系数为2.11×105L·mol-1·cm-1,线性范围为0~1.1μg/mL,抗干扰能力强。应用该方法首次测定实际样品(松花蛋、头发、茶叶、白酒、树叶、河水、工业废水、大米、食品包装袋、罐头盒、韭菜)中痕量铅的质量浓度,结果令人满意。  相似文献   
86.
    
Abstract

The paper specifies and estimates a hybrid McCallum–Taylor monetary policy reaction function for the Dominican Republic (DR). The estimated reactions suggest that the Central Bank of the DR has been biased towards targeting the exchange rate. These findings are in line with the evidence on the fear-of-floating characteristic of developing countries. An evaluation of the estimated rule's historical performance shows that monetary base growth below (above) that implied by the ‘average’ policy reaction is associated with better (worse) macroeconomic performance.  相似文献   
87.
研究了以1,8-辛二醇为原料,用二氢吡喃作单边保护,在Tempo催化剂下用NaClO氧化,再与丙二酸发生kaoevenaglel反应来合成王浆酸的新路线.结果表明:该路线具有原料易得,各步反应条件温和,分离简单,路线短等特点,为王浆酸的新工业化生产提供了科学依据和理论基础.  相似文献   
88.
裘敏达  于鑫州  张春牛 《价值工程》2010,29(31):261-262
报道了本文报道了1-(4-硝基苯基)-3-(4-硝基-噻唑)-三氮烯(NPNTT)的合成及其与铜的显色反应。在TritonX-100存在下,pH11.0的Na2B4O7-NaOH缓冲溶液中,该试剂能与铜发生显色反应,铜与NPNTT形成摩尔比为1:2型的配合物,在460nm处有一最大正吸收,在540nm处有一最大负吸收。以460nm为参比波长,540nm为测量波长进行双波长测定,表观摩尔吸光系数为2.68×105L·mol-1·cm-1,铜的浓度在0~480μg/L范围内符合比尔定律。用拟定方法测定人发中的微量铜,结果满意。  相似文献   
89.
    
Supply chain and reputational risks are often assumed to motivate firms to source production in developed, high-cost countries rather than developing, low-cost countries. To examine this assumption, we provide evidence from the collapse of the Rana Plaza building on April 24, 2013, which with its 1133 fatalities and 2438 injuries is seen as one of the worst industrial accidents in history. Do markets reactive negatively enough to such events to motivate firms to shift their sourcing strategy? We analyze the stock market reaction to the Rana Plaza disaster in the Bangladeshi ready-made garment industry to address this question. Our analysis is based on a sample of 39 publicly traded global apparel retailers with significant garment sourcing in Bangladesh. Stock market reaction to retailers on the day of the Rana Plaza disaster is negative, but its magnitude and significance dissipate by the following day. We find no evidence of significant stock market reaction during the 11 trading days (approximately two weeks in calendar time) following the disaster. Retailers responded to the disaster by developing two different agreements to improve factory and worker safety in Bangladesh – the Accord on Fire and Building Safety in Bangladesh (AFBSB), and the Alliance for Bangladesh Worker Safety (ABWS). We find no evidence of significant stock market reaction to the announcements of the AFBSB and the ABWS. The insignificant negative economic impact from the Rana Plaza disaster suggests that retailers have little economic incentive to move sourcing out of Bangladesh or other low-cost countries so as to reduce the risk of being involved in such events. We discuss the implications of our results for retailers, non-governmental organizations (NGOs), garment factory owners in Bangladesh, the Bangladeshi government, and academic researchers.  相似文献   
90.
    
This study examines the effect of macro‐economic shocks on asymmetric investor reactions to earnings announcements. Specifically, we focus on a small range around the earnings benchmark and find a disproportionately large market penalty for firms with small negative earnings surprises (ESs) following an increase in macro‐uncertainty. By contrast, we find no evidence of an asymmetric market reaction to firms with small negative ESs following a decrease in macro‐uncertainty. While prior empirical research failed to document the large penalty for small negative ESs, our findings suggest macro‐economic shocks as a factor that explains the asymmetric pricing effect.  相似文献   
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