数字金融能够促进企业绿色投资吗？——基于中国重污染行业上市公司的实证研究

数字金融实现了金融资源的高效配置,为重污染企业实现绿色转型提供了新机遇。基于2011—2021年中国重污染行业沪深A股723家上市公司的面板数据,实证分析数字金融发展对重污染企业绿色投资的影响及其传导机制。研究结果证实,数字金融发展能够显著提高重污染企业绿色投资水平,并通过一系列稳健性检验后该结论仍然成立。作用机制检验结果表明,数字金融可以通过缓解融资约束、抑制企业金融化进而提高重污染企业绿色投资水平。进一步分析发现,环境规制、分析师关注度正向调节了数字金融对重污染企业绿色投资的促进效果;数字金融仅对重污染行业中国有企业和大规模企业的绿色投资水平存在显著作用。最后,基于研究结论,提出推动数字金融发展与企业绿色投资的相关建议。     

外商直接投资与经济增长:基于动态VAR模型的分析

外商直接投资与经济增长的关系一直是国内外学者研究的热点。本文运用向量自回归(VAR)模型、脉冲响应函数、方差分解等计量经济学方法,基于2002年至2011年的季度数据,对外商直接投资与经济增长的关系进行了实证研究。结果表明:从长期来看,外商直接投资的增加有助于促进经济增长,但是短期这种促进作用并不明显;经济增长有助于外商直接投资的增加。     

Energy Prices and Carbon Taxes under Uncertainty about Global Warming

This paper extends the strategic interactions between producers of fossil fuels concerned about their profits and a taxing government concerned about the consumers’ welfare for uncertainty: global warming follows an Itô -process. Stochasticity requires to differentiate between reversible and irreversible emissions in contrast to the deterministic version. The unconstrained (= reversible) case allows for a closed form solution but not the more realistic and constrained case. Nevertheless interesting analytical properties (e.g. about when to stop emissions, implicit conservation due to monopolistic supply) are derived and complemented by a numerical example.     

TS模糊模型在个股股价预测中的应用研究

个股价格短期内的变化量一般可通过股票技术指标间接反映出来,且这些指标间有着一定的相关性;另外,股票价格模型具有Takagi-Sugeno(TS)模糊模型所研究问题的非线性、时变性特点,基于此,本研究将TS模糊模型与分析出的股票常用技术指标相结合进行股价预测。结果显示预测出的价格与股票实际价格近似一致,精度高,因此研究具有一定的实用价值。     

"穷人经济学"的信贷革命新命题

“穷人”和“穷企业”都是市场经济的弱势群体。要在“穷人经济学”的命题下,在适宜的信贷文化氛围中, 实现兼顾公平的小额信贷管理的商业性的可持续成长的新革命。     

内外融资对企业不同阶段创新投资的异质性效应——基于中国制造业上市公司的数据

根据创新价值链理论,将企业创新活动分为研究阶段(R)与开发阶段(D),探究内外源融资方式对企业不同创新阶段投资的异质性效应,为企业选择创新活动的融资渠道和政府设计精准支持企业创新政策提供参考。基于中国制造业上市公司数据实证研究发现:内源融资对企业研究投资有显著促进效应,对开发投资未产生显著促进作用;债权融资对研究投资和开发投资的作用均不显著;股权融资对研究投资的影响不显著,但对开发投资具有显著影响。内源融资对债权融资与研究投资、债权融资与开发投资的关系不具有调节效应;内源融资对股权融资与研究投资关系具有正向显著调节效应,对股权融资与开发投资的关系具有正向调整作用但不显著。     

Optimal investment and production decisions and the value of the firm

We explore the effects of uncertainty on a firm that can respond by modifying its investment or production schedule (or both simultaneously) to variations in output price. Investment may increase capacity and/or reduce costs. We consider a firm with finite resources.Our model uses option theory instead of the more traditional net present value framework. One of the early papers using this approach is Brennan and Schwartz (1985) in which an investment project to extract a finite natural resource is valued. In that paper, the value of the firm is a function of two state variables, the finite resource to be extracted (output to be produced in the future) and the commodity spot price. In order to maximize firm value, the manager can respond by modifying one control variable, the production level. In our model we handle instead three state variables (spot price, resources, accumulated investment) and two control variables (production rate and investment rate), and solve numerically.We obtain both the value and the optimal policy of a firm that has investment projects that increase capacity and/or reduce costs and illustrate optimal policies as resources and available investments decrease over the life of the firm. Firms may start by only investing, then invest and produce, to end only producing.We thank Scott Wo, the referee and the editor for their comments and suggestions. Cortázar and Lowener acknowledge the financial support from FONDECYT and FONDER.