Real option valuation of public sector R&D investments with a down-and-out barrier option

This paper presents a real options approach for valuing public-sector research and development projects, using a down-and-out barrier option. Specifically, it considers the potential savings to the tax payer for investing in technology to be purchased by a national government. The valuation is performed with stretched trinomial lattices. Government-driven demand for this technology is equated with the underlying asset, and valuation measured in terms of potential government savings. Two variables, volatility of demand for the technology and unit cost, are treated as uncertain. A Monte Carlo simulation is performed to understand the effects of these variables on the valuation. Other variables are estimated, and a parametric analysis is performed to understand the effects of these variables. To illustrate how this approach could be used, the development of a new sensor, to be used in large networks that track greenhouse gas fluxes, is considered as an example.     

Exact linear rank tests for two‐sample equivalence problems with continuous data

The present paper introduces a methodology for the semiparametric or non‐parametric two‐sample equivalence problem when the effects are specified by statistical functionals. The mean relative risk functional of two populations is given by the average of the time‐dependent risk. This functional is a meaningful non‐parametric quantity, which is invariant under strictly monotone transformations of the data. In the case of proportional hazard models, the functional determines just the proportional hazard risk factor. It is shown that an equivalence test of the type of the two‐sample Savage rank test is appropriate for this functional. Under proportional hazards, this test can be carried out as an exact level α test. It also works quite well under other semiparametric models. Similar results are presented for a Wilcoxon rank‐sum test for equivalence based on the Mann–Whitney functional given by the relative treatment effect.     

中国企业的出口市场选择：事实与解释

本文基于2000~2006年中国海关数据库企业 出口市场对的贸易数据,采用条件Logit模型考察中国企业出口市场选择的空间模式。结果表明,中国企业的出口市场选择受企业以往出口经验的影响,存在明显的路径依赖。企业倾向于选择与老出口市场地理邻近或文化相似的出口市场建立新贸易关系,尤其是与前者。其中,外资企业和加工贸易企业的出口市场选择更加依赖于新老出口市场间的各种相似性关系。这提醒我们,企业应充分利用自身的出口经验,尤其是成功的出口经验在相似出口市场间的溢出效应以加强新市场开拓的针对性和有效性,形成结构合理的贸易网络以稳定出口。     

Der Lehrstuhl für Allgemeine Betriebswirtschaftslehre — insbesondere Rechnungswesen und Controlling — der Helmut-Schmidt-Universität,Universität der Bundeswehr Hamburg

Ohne Zusammenfassung     

平均工资、缴费下限与养老保险参保

研究目标：研究养老保险参保缴费逆向激励产生的原因、作用机制以及后果。研究方法：通过构建刻画参保者行为的生命周期模型,数值模拟分析平均工资增长对参保者效用的影响;借助自然实验构建固定效应工具变量回归,实证研究平均工资增长对参保行为的影响。研究发现：基于在岗职工平均工资的缴费下限设定,增加了低收入者的实际缴费负担,随着平均工资的提高,在借贷约束的限制下,为保障当期消费,低收入者会退出养老保险制度;平均工资上涨会显著降低参保职工人数,导致缴费遵从度下降。研究创新：通过研究平均工资变化对实际费率负担的影响,揭示低收入者的参保行为。研究价值：为养老保险制度改革,提供理解参保者微观行为的理论框架和实证依据。     

七大城市群创新能力的区域差距及其分布动态演进

研究目标：京津冀、长三角、珠三角、长江中游、成渝、中原以及哈长城市群创新能力的区域差距及其时空动态演进。研究方法：运用Dagum基尼系数、Kernel密度估计、空间Markov链进行实证研究。研究发现：七大城市群创新能力空间差距呈缩小趋势但依然显著,区域间差距是总体差距的主要来源;其创新能力分布呈不同的极化现象与趋势;其创新能力发展具有显著的空间依赖性,邻域创新环境的优劣对周边城市创新水平的向上转移产生非同步、差异化影响。研究创新：挖掘七大城市群创新能力区域差距来源,并通过科学揭示其时空演变规律为城市群创新差距提供空间解释。研究价值：对缩小城市群创新能力区域差距,构建创新驱动的区域经济发展支撑点具有重要的理论和现实意义。