共查询到20条相似文献,搜索用时 31 毫秒
1.
2.
3.
4.
经历了近十年的磨砺后,创业板终于千呼万唤始出来。《首次公开发行股票并在创业板上市管理暂行办法》于2009年5月1日起正式实施,中国证监会自7月26日起开始受理创业板发行上市申请,9月17日,证监会创业板发审会审核首批7家企业首次公开发行申请,7家公司全部通过审核。自此,创业板市场正式启动。 相似文献
5.
6.
7.
8.
9.
10.
数千万中小投资者是支撑我国股市的基石,其利益应当得到尊重和保护。现实是我国股票市场重融资、轻回报,长期投资收益率偏低,呈现“熊长牛短”的局面,中小投资者损失惨重。 相似文献
11.
12.
13.
14.
古代,有位富甲一方的财主,想为自己的独生女儿选丈夫,为此制订了“权、财、貌、德、才”等N个方案和标准,试图百里挑一,找到一位“他”称心如意,“鱼和熊掌”都可兼得的贤婿。于是乎,张榜天下纳贤婿,应者芸芸,经过层层筛选,入围者众多,财主也不知选哪一位合适,看入围者都似完美,却总感觉有少许遗憾。 相似文献
15.
Fragkiskos Filippaios Constantina Kottaridi 《Review of urban and regional development studies : RURDS : journal of the Applied Regional Conference》2004,16(2):93-112
This paper aims at mapping and analyzing the determinants of industrial activity in Greek regions in order to assess current investment patterns. For this purpose, we estimate a conditional logit model of 226 new established firms for 1996 and 1997. Results give interesting insights that are likely of particular importance to regional policy makers. Noteworthy is the spatial concentration of firms in different prefectures while the large metropolitan cities, Athens and Thessalonica, although with declining shares, prevail as the dominant hosts. European regional policy seems to enhance firms'entry via its effect on economic development variables, in contrast with the Greek Development Law, which turns out non-influential. 相似文献
16.
17.
18.
19.
Abstract Propensity score matching (PSM) has become a popular approach to estimate causal treatment effects. It is widely applied when evaluating labour market policies, but empirical examples can be found in very diverse fields of study. Once the researcher has decided to use PSM, he is confronted with a lot of questions regarding its implementation. To begin with, a first decision has to be made concerning the estimation of the propensity score. Following that one has to decide which matching algorithm to choose and determine the region of common support. Subsequently, the matching quality has to be assessed and treatment effects and their standard errors have to be estimated. Furthermore, questions like ‘what to do if there is choice‐based sampling?’ or ‘when to measure effects?’ can be important in empirical studies. Finally, one might also want to test the sensitivity of estimated treatment effects with respect to unobserved heterogeneity or failure of the common support condition. Each implementation step involves a lot of decisions and different approaches can be thought of. The aim of this paper is to discuss these implementation issues and give some guidance to researchers who want to use PSM for evaluation purposes. 相似文献