补贴对中国企业出口行为的影响——基于配对倍差法的经验分析

文章利用配对倍差法控制内生性后,基于新新贸易理论,利用1999-2007年中国工业企业微观数据,经验分析了补贴对企业是否出口及出口规模的影响。分析结论是,补贴显著提升了企业的出口可能性和出口规模;相对于未补贴企业,补贴企业出口概率增长率高出30%-110%,出口规模增长率高出30%-50%;对外资企业的影响大于本土企业,对私营企业的影响大于国有企业;但补贴对出口规模的影响在入世后特别是近年来才显现。这意味着补贴对出口的影响可能存在门槛效应。从政策层面看,尽管政府可以通过补贴等政策手段帮助企业走出国门,但要在国际市场实现持续增长仍要靠企业自身的核心竞争力。     

科技金融发展与高新技术企业劳动力需求

高新技术企业是高质量充分就业的重要经济主体,其发展离不开科技金融的有效支持。基于此,采用2010—2022年省级面板数据,探究科技金融发展对高新技术企业劳动力需求的相关影响。研究发现:科技金融发展对高新技术企业劳动力需求具有显著的正向推动作用,技术进步、广延边际和集约边际为其有效传导渠道。同时,该作用呈现出显著的异质性特征,具体表现在高技能和低技能劳动力、科技企业孵化器发展程度较高地区、技术市场较活跃地区及知识产权政策支持地区四个方面。此外,还发现科技人才供给和企业家精神的正向调节作用,以及政府罚没行为的负向调节作用。鉴于此,应强化科技金融投入力度,推动技术创新、提高创业水平和助力企业成长,发挥各类政策和制度的激励作用,以此实现金融助力高质量就业     

贸易自由化是如何影响我国出口产品质量的？*--基于贸易政策不确定性下降的视角

传统理论认为贸易自由化会促进出口产品的质量升级,但我国加入W TO后的情况却并非如此。文章基于贸易政策不确定性的视角,利用我国加入W TO前后美国对我国产品进行关税调整这一自然实验,通过倍差法分析了贸易自由化对我国出口产品质量的影响。研究表明：（1）在贸易自由化的过程中,贸易政策不确定性的下降会拉低我国的出口产品质量,且这一结论在改变质量测度方法、控制成本效应以及使用不同的产品属性、贸易对象和样本的情况下依然稳健;（2）贸易政策不确定性主要是通过广延边际上的质量调整降低了我国出口产品的总体质量,即在贸易政策不确定性下降幅度越大的产品中,有越多的生产低质量产品的企业进入出口市场;（3）在集约边际上,存续企业并未针对贸易政策不确定性的下降做出及时的产品质量调整,从而无法改变我国的产品质量在短期内下降的趋势。文章为我国如何在推行贸易自由化的同时实现出口产品质量升级提供了启示。     

Financial development,economic growth and convergence clubs

To study the role of financial development in economic growth, we apply an array of convergence tests designed to capture nonlinear transitional dynamics to real outputs per capita. Strong evidence of multiple convergence clubs is observed, implying that the clubs are formed based on the initial level of real output per capita and average growth rate. Our empirical results show that the stage of economic growth of each country plays an important role for the composition of the convergence clubs. Furthermore, financial development emerges to be a significant determinant, albeit plays differently in the economic growth of each convergence club.     

Reopening the convergence debate: A new look at cross-country growth empirics

There are two sources of inconsistency in existing cross-country empirical work on growth: correlated individual effects and endogenous explanatory variables. We estimate a variety of cross-country growth regressions using a generalized method of moments estimator that eliminates both problems. In one application, we find that per capita incomes converge to their steady-state levels at a rate of approximately 10 percent per year. This result stands in sharp contrast to the current consensus, which places the convergence rate at 2 percent. We discuss the theoretical implications of this finding. In another application, we perform a test of the Solow model. Again, contrary to prior reults, we reject both the standard and the augmented version of the model.     

Is food consumption a good proxy for nondurable consumption?

This paper examines whether there is a discrepancy in estimating the elasticity of intertemporal substitution using food consumption instead of nondurable consumption data. We show that a discrepancy exists and that the discrepancy increases as nondurable consumption increases.     

Dynamic panel data models: a guide to micro data methods and practice

This paper reviews econometric methods for dynamic panel data models, and presents examples that illustrate the use of these procedures. The focus is on panels where a large number of individuals or firms are observed for a small number of time periods, typical of applications with microeconomic data. The emphasis is on single equation models with autoregressive dynamics and explanatory variables that are not strictly exogenous, and hence on the Generalised Method of Moments estimators that are widely used in this context. Two examples using firm-level panels are discussed in detail: a simple autoregressive model for investment rates; and a basic production function.JEL Classification: C23This paper is prepared for a special issue of the Portuguese Economic Journal. My understanding of this subject has benefitted immeasurably from the input of colleagues, notably Manuel Arellano, Richard Blundell, Costas Meghir, Steve Nickell and Frank Windmeijer. I thank Joao Santos Silva, Frank Windmeijer and other participants at the Cemmap/ESRC Econometric Study Group workshop in London on 22 February 2002 for detailed comments on an earlier draft. Financial support from the ESRC Centre for the Microeconomic Analysis of Public Policy is gratefully acknowledged.     

中国债券市场的可预测性和分割性研究

本文研究了中国债券市场综合收益、长短期债券收益差异、银行间市场和交易所市场收益差异的样本内和样本外可预测性。本文选取宏观、中观（市场）、微观3个层面27个变量以及利用主成分分析法生成6个主成分变量作为预测变量,发现中国债券市场综合收益率在剥离了特殊品种债券之后具有一定的样本内和样本外可预测性。基于主成分提取的预测变量的预测能力更强,部分宏观经济指标和市场层面指标都可以预测债市风险溢价。基于27个指标提取的第一主成分对期限溢价、场所溢价在样本内均有较强的预测能力,而样本外可预测性较差。本文结论表明,我国债券市场容易受到宏观经济影响,银行间市场和交易所市场在市场功能上并没有很大的差异,两个市场的分割随着债券市场的波动而加剧。     

地方政府经济干预行为的经济学解释

以往分析地方政府干预经济行为的研究较多关注于地方政府的意识形态偏好.文章通过构建以中央政府行为为外生变量的地方政府行为模型,对在中央政策给定的情况下,地方政府的种种政策选择做出分析.对地方政府以优惠政策招商引资、对垄断部门实施保护以及民营企业对地方官员的\"公关\"、民企参与国企改组迟缓等现象做出了解释.借助地方政府和中央政府的动态博弈模型,分析了中央政策对地方政府行为的影响.     

The Effect of Protest Votes on the Estimates of WTP for Use Values of Recreational Sites

Contingent valuation studies are often characterized by a considerable number of protest responses, which may cause selectivity bias on the final estimates for WTP. Sample selection models can detect and – if necessary – correct selectivity bias. In economic applications where the relevant dependent variable is continuous, sample selection models are generally estimated using Heckman's 2-step method rather than the FIML estimator. Either method has its own drawback: computational complexity for the FIML method, susceptibility to collinearity problems for the 2-step method. Using data on valuation of forest resources for recreational use, we analyse the performance of the two estimators. In this application, given the presence of some collinearity, the FIML is preferred to the 2-step method. A procedure is outlined to deal with selectivity problems in similar settings.     

融资、融券交易及其波动对股价稳定性的影响一致吗*

本文区分并讨论了融资交易、融券交易及二者的波动对标的股价稳定性影响的不一致性。研究表明,融资交易提高了标的股价的整体稳定性却加剧了股价异常下跌频率,而融券交易对股价整体稳定性及异常下跌频率并不存在显著影响。更重要的是,融资交易的异常波动加剧了股价的不稳定,而融券交易的异常波动则有助于提高股价稳定性。本文的政策启示在于,应采取比较“温和”的方式调控融资交易以避免融资交易的过度波动加剧标的股价的不稳定。     

股市人口和股市信息来源:北京分层抽样调查研究

以在证券交易部散户大厅进行交易的北京股民群体为研究对象,采用分层调查分析、统计推断的方法就其群体特征和媒介接触行为展开研究。不同年龄层次、文化程度、收入水平,及不同城区和性别的股市人口在报刊杂志、广播电视、网络和股民交流等信息渠道的选择上表现出一定的倾向性。以人口学背景变量为主的非行为因素的解释能力强于行为因素。     

教育工资升水率的微观计量分析

文章运用现代微观计量经济学的分析方法,估计了我国大学教育的工资升水率。文章在研究中从选择偏差及异质性着手,论证了OLS与传统IV估计量的非一致性,进而采用了平均政策效应以弥补两者缺陷。研究结果表明,我国劳动力市场上大学教育的工资升水率已经比20世纪80年代与90年代有显著提高。