后危机时代我国工业优势产业评价研究

本文运用比较优势和竞争优势理论,采用带动优势、贡献优势、需求收入弹性以及加权综合法等方法对后危机时代我国工业的不同产业进行定量化评价,确定我国工业发展的优势产业,为产业发展政策的制定提供理论依据,并提出提升优势产业竞争力的对策建议。     

基于DEA—Tobit的我国药品流通企业效率影响因素分析

针对我国药品流通业存在“多,散,小”、效率低、流通费用高的问题,当前的主流观点是提高行业集中度、退出国有股份等.本文首先通过Pastor筛选法筛选出投入变量,构建DEA模型。并计算样本企业的效率。再用Tobit模型分析影响DEA效率的因素。结果发现：（1）企业规模与综合效率、纯技术效率正相关,但与规模效率负相关,因此在提高行业集中度的同时应当注意规模效率的提高;（2）产商一体化的混业经营比专业化经营更有效率;（3）国有股份的存在有利于效率的提高,同时由于药品的特殊性,应适度保留国有股份。     

银行效率实证研究的投入产出指标选择

评述了近年来有关重点文献中银行效率测算时投入产出指标选择的共性问题,如指标的重复与遗漏、对应股东权益的资本价格统计口径偏误等;与大多数文献一样依据中介法的思想,针对不同的测算目的建立了相应的投入产出指标体系,并明确了各项指标在财务报表中对应的项目;对我国全部16家上市银行近6期数据的实证表明使用三套评价指标体系测算的效率结果大体上一致。     

Natural selection and rational decision: two concepts of optimization

There are two different kinds of optimization: “selection” and “rationality” optimization. Selection optimization characterizes competition in human and nonhuman societies sharing the same market or niche. “Rationality optimization”, on the other hand, characterizes human and nonhuman decision making processes. The two kinds of optimization generate the same result: agents end up behaving efficiently. Nonetheless, we should not downplay the differences between the two kinds of optimization. Otherwise, we would fail to capture the role of rationality in the development of the organism and possibly its implication for evolution.

Out of sight but not out of mind: Why failure to account for left truncation biases research on failure rates

We note at least three major issues in entrepreneurship theory that can be clarified by studying the survival chances of new ventures: the extent to which entrepreneurs are so constrained by initial founding conditions that they are unable to learn; the degree to which heterogeneity and innovative capabilities are lost due to the failure of new ventures; and the imprinting effects of new ventures' early days on their subsequent development. However, previous research on these issues has been inconclusive because of problems in research design and data analysis. In this paper, we shed light on new venture failure rates by assessing the validity and generalizability of previous findings. We argue that research using registration data to study new ventures is very likely to generate biased results and that research attempting to track new ventures from a very early stage can still suffer from selection bias due to left truncation. Using a sample of new ventures from the Panel Study of Entrepreneurial Dynamics II, we provide evidence for the extent of such biases. We offer a statistical solution to left truncation that can be easily applied in widely used statistical programs.     

国家基础设施投资与区域发展战略耦合——一项抵御国际金融危机冲击的经济增长策略

为应对1997年东南亚金融危机冲击,我国政府把西部地区作为基础设施投资重点,取得了加快西部地区发展,同时刺激全国经济持续增长的成功经验。这证明,国家基础设施投资与区域发展战略耦合是一项值得重视的抵御国际金融危机冲击的经济增长策略。当前,为抵御新的国际金融危机冲击,我国政府实施了大规模的基础设施投资计划。国家宜把中部地区作为这轮基础设施投资的重点区域,以收到加快中部地区崛起步伐、营造区域热点、刺激全国经济持续增长的效果。 ?     

公私合作伙伴:城市治理的新模式

随着经济全球化、市场化、信息化和网络化的发展,传统的城市管理模式被现代城市治理模式所替代,而全面构筑公私伙伴关系,又成为城市治理的新模式.本文重点对城市公私合作伙伴治理进行了理论和案例分析,并简要提出了构筑我国城市公私合作伙伴治理体系的政策选择.     

天津中小企业的成长性与区域选择

合理的区域选择是影响中小企业成长性的重要因素。结合中小企业区域选择的理论与原则,针对天津市中小企业的区域分布现状及特点,提出要增强天津市中小企业的成长性,就必须在进行行业定位时突出区域特色和优势,根据企业类型合理选址,充分发挥中小企业的区域联动作用,加快城市化进程。     

连续进化金融模型与全局渐进化稳定策略

本文运用达尔文生物进化论思想研究连续交易金融市场选择的动态变化及一般均衡规律。本文发现并证明了:金融资产“赢利”的充要条件是该资产相对股息大于相对股价;投资比例等于股息分发比例的简单混合策略是全局渐近进化稳定策略;在均衡条件下,对应的金融资产价格等于该资产股息占总股息的比例的数学期望;市场变异或金融创新是有效市场形成的动力;全局渐近进化稳定策略业绩可能在某些时候不是最好的,但只要其初始财富大于零,最终将控制市场上的所有财富,而简单混合策略,可能在某个时候业绩优良,然而,在市场存在全局渐近进化稳定策略的条件下,只要其初始财富份额小于1,最终控制的财富趋向于零,从而被市场所淘汰。     

Wheat variety yield data: Do commercial and public performance tests provide the same information?

Wheat yields from reported performance test results are of economic importance to wheat producers, since their profits depend on selecting the optimal variety for their location. However, our data shows differences in absolute and relative wheat yields between commercial and public wheat breeding program's performance test data in Kansas. Newly available data are used to test if the difference in yields arose from potential selectivity bias, and to determine the contribution of private and public wheat breeding programs to varietal yield improvement during 2007–2012. Both Heckman selection models and multiple regression showed no statistical evidence of the potential presence of selectivity bias rather, managerial practices, agronomic conditions, field location, and inherent genetic traits of the seed variety were identify as the source of yield differences.