Ricardian productivity differences and the gains from trade

This paper evaluates the role of sectoral heterogeneity in determining the gains from trade. We first show analytically that in the presence of sectoral Ricardian comparative advantage, a one-sector sufficient statistic formula that uses total trade volumes as a share of total absorption systematically understates the true gains from trade. Greater relative sectoral productivity differences lead to larger disparities between the gains implied by the one-sector formula and the true gains. Using data on overall and sectoral trade shares in a sample of 79 countries and 19 sectors we show that the multi-sector formula implies on average 30% higher gains from trade than the one-sector formula, and as much as 100% higher gains for some countries. We then set up and estimate a quantitative Ricardian–Heckscher–Ohlin model in which no version of the formula applies exactly, and compare a range of sufficient statistic formulas to the true gains in this model. Confirming the earlier results, formulas that do not take into account the sectoral heterogeneity understate the true gains from trade in the model by as much as two-thirds. The one-sector formulas understate the gains by more in countries with greater dispersion in sectoral productivities.     

Monetary policy and speculative spillovers in financial markets

This paper examines the role of monetary policy (MP) as a driver of connectedness patterns in speculative activities in financial markets. Examining measures of speculation in four major markets including gold, equities, Treasury bonds and crude oil, we show that speculative activities can spill over across markets with the stock market generally serving as the main transmitter of speculative shocks. While unconventional MP is associated with greater connectedness of speculative activities in financial markets, we also find that unconventional (conventional) MP drives gold (financial assets) to serve as a net transmitter of speculative shocks to the other markets. The findings establish an important link between the monetary policy signals and trading behavior in financial markets with significant policy implications.     

Survival of the fittest: The impact of eco‐certification and reputation on firm performance

Owing to the increased trend for organic products and the concept of sustainable development, firms must invest in valuable and unique resources to achieve long‐term success and gain competitive advantages. Building on insights from the resource‐based view and natural‐resource‐based view of the firm, the study focuses on the contribution of corporate reputation and eco‐certification as intangible influences on corporate performance. Duration analysis is applied on a sample of 1,572 German wineries over the period 1994 to 2017. The results indicate that individual reputation and eco‐certification have a statistically significant and positively impact on corporate performance, whereas there is no clear evidence of this relationship for collective reputation. In addition, especially those firms with high individual reputation benefit most from eco‐certification. These results are robust across different parametric and semiparametric model estimations.     

经济环境、环境规制类型与省域节能减排技术创新——基于异质性科研主体的实证分析

采用模糊集定性比较分析法（fsQCA），以经济集聚、区域开放、研发主体构成、命令型环境规制、市场型环境规制为前因条件，评估2011-2018年中国内地（除西藏外）30个省市的节能减排技术创新情况。结果显示，省域节能减排技术创新绩效是由前因因素组合决定的，引致高绩效的路径不唯一；经济集聚、区域开放是产生高绩效的重要条件。省域节能减排技术创新绩效与研发主体构成密切相关，在公共研究机构占主导的省域，命令型规制的作用显著；在企业占主导的省域，命令型规制的效果取决于经济环境，而市场型规制总体上不利于节能减排技术创新。该研究结果有助于丰富节能减排技术创新理论，同时，为不同经济环境下的政策制定提供决策依据。     

关键研发者自我中心网络变化对企业创新绩效的影响:以整体网络为中介变量

关键研发者作为组织创新的重要参与者,对创新绩效具有显著影响,但其影响机制不明确。以整体网为中介变量,利用36家通讯制造企业专利数据,分两个步骤探究关键研发者对创新绩效的影响机制。第一步,探索关键研发者的个人网络特征、网络规模及网络密度变化对整体合作网络和知识网络中介中心势的影响;第二步,研究整体网络的中介中心势变化(正向和负向)与创新绩效的关系。结果表明:在合作网络中,关键研发者自我中心网络规模变化幅度增大会引起整体合作网络中介中心势变化幅度增大;关键研发者引起的合作网络中介中心势变小会使企业创新绩效显著降低;在知识网络中,关键研发者自我中心网络规模与网络密度变化幅度增加均会使整体知识网络中介中心势变化幅度显著增大。由关键研发者引起的知识网络中介中心势变小会使企业创新绩效显著提升。     

Sustaining Competitive Advantage Through Corporate Environmental Performance

This research investigates the relationship between a firm's environmental efforts and the sustainability of its competitive advantage by analyzing the effects of change in firm environmental performance on the persistence of profitability growth. We find that environmental resources allow a firm with superior financial performance to sustain its competitive advantage, and also complement the efforts of a poorly performing firm to hasten recovery from inferior financial performance. Our findings further indicate that firms attain such positive effects through enhanced profit margins resulting from improved environmental performance. Additionally, we observe that a corporate strategy of improving environmental performance demonstrates management's responsibility to maximize the shareholder wealth of a well‐performing firm. The results provide valuable insights to align environmental activities towards developing unique resources for sustaining the competitive advantage. The study provides an empirical support for creating economic value by benefiting the environment. Copyright © 2016 John Wiley & Sons, Ltd and ERP Environment     

Evaluating sponsorship through the lens of the resource-based view: The potential for sustained competitive advantage

The resource-based view (RBV) of the firm has become a prominent management theory that firms can use to analyze resources as potential sources of competitive advantage. Theorists have suggested sponsorship of sport properties as one such resource, yet specific cases of sponsorship's role in a firm's achievement of a sustained advantage over competitors have yet to be explored. This article illuminates the case of Visa's longstanding global sponsorship of the Olympic Games, which was initiated and leveraged to counteract competitor American Express’ advantage with global business travelers. Evidence is presented that supports Visa's achievement of a competitive advantage during the term of the sponsorship. The case is then used to develop a conceptual model based on the RBV to identify the key characteristics of sponsored properties capable of assisting the sponsoring firm in achieving a sustained competitive advantage. From a managerial perspective, the model is designed to assist marketing managers tasked with the identification and evaluation of potential sponsorship properties.     

La medición del capital intelectual y su impacto en el rendimiento financiero en empresas del sector industrial en México

Currently knowledge is considered an essential resource to contribute to the creation and generation of competitive advantage in organizations. The human factor as an intangible resource of a company has become a main value generator, and even though both knowledge management and intellectual capital are intangibles that can be measured in the financial reports of companies, their position as main value generators is not reflected in financial information. In Mexico, industrial sector companies need to promote the creation of intellectual added value based on its own abilities, which reside on their intellectual capital. The value added intellectual coefficient (VAIC?), with its components, is a tool that contributes to achieving this goal, and helps to identify the positive impact on key factors such as financial profitability, market capitalization and level of share value.     

浅谈多媒体技术在计算机教学中的应用

简述了多媒体技术在教学中的优势,并就其存在的问题提出相应的改进建议。     

DO WATER-RICH REGIONS HAVE A COMPARATIVE ADVANTAGE IN FOOD PRODUCTION? IMPROVING THE REPRESENTATION OF WATER FOR AGRICULTURE IN ECONOMIC MODELS

With growing demand for fresh water and uncertain supplies, there is an increasing concern about future water scarcity. Since most freshwater withdrawals are for agriculture, reliance on water embodied in imported food (trade in ‘virtual water’) is a possible strategy to provide food to water-stressed regions while conserving their scarce supply for other purposes. To evaluate this proposition, we extend a model of interregional trade by (1) defining endowments of water that cannot be exceeded, (2) allowing simultaneous operation of rainfed and irrigated agriculture, and (3) distinguishing sub-regional endowments within a larger economic region. An application to the Mexican economy compares region-specific water abundance with economic comparative advantage under alternative scenarios. We conclude that the water-rich regions of Mexico are relatively high-cost producers of food and that they do not pick up the slack even when the lowest-cost Mexican regions are constrained by binding water constraints.