Heteroskedasticity-consistent covariance matrix estimators for spatial autoregressive models

In the presence of heteroskedasticity, conventional test statistics based on the ordinary least squares (OLS) estimator lead to incorrect inference results for the linear regression model. Given that heteroskedasticity is common in cross-sectional data, the test statistics based on various forms of heteroskedasticity-consistent covariance matrices (HCCMs) have been developed in the literature. In contrast to the standard linear regression model, heteroskedasticity is a more serious problem for spatial econometric models, generally causing inconsistent extremum estimators of model coefficients. This paper investigates the finite sample properties of the heteroskedasticity-robust generalized method of moments estimator (RGMME) for a spatial econometric model with an unknown form of heteroskedasticity. In particular, it develops various HCCM-type corrections to improve the finite sample properties of the RGMME and the conventional Wald test. The Monte Carlo results indicate that the HCCM-type corrections can produce more accurate results for inference on model parameters and the impact effects estimates in small samples.     

Persistence in Portuguese mutual fund performance

Recent evidence suggests that future performance is predictable from past performance, that is, funds with superior (inferior) performance in the past are likely to remain good (bad) performers in the future. This research addresses the persistence of mutual fund performance in a European regional market (the Portuguese equity fund market). Some of the problems in evaluating fund persistence are identified in the context of limited sample size and using the peer group median as a benchmark for contingency table analysis of performance persistence. The criteria for assessing performance persistence based on the contingency table methodology of repeated winners and losers are presented in terms of significance statistics, adjusted for small sample bias. The adjustments are accomplished through the Yates continuity correction and Fisher's exact p-value. The appropriateness of each criteria under different circumstances is also discussed. The analysis of the returns of all Portuguese domestic equity funds, since a representative number was established, shows some performance persistence (on a quarterly basis). The persistence, however, is reduced when the returns are controlled for the various dimensions of risk. Significant risk persistence has been documented. Furthermore, for more or less frequent intervals of measurement, the industry persistence is rejected, although individual funds exhibit superior/inferior performance.     

Trade, inequality, and the political economy of institutions

This paper investigates the relationship between international trade and the quality of economic institutions. We model institutions as fixed costs of entry, in a framework that has two key features. First, preferences over entry costs differ across firms and depend on firm size. Larger firms prefer to set higher costs of entry, in order to reduce competition. Second, these costs are endogenously determined in a political economy equilibrium. Trade opening can lead to higher entry costs when it changes the political power in favor of a small elite of large exporters, who in turn prefer to install high entry barriers.     

The Buyer–Supplier Relationship: An Integrative Model of Ethics and Trust

Dialogues between companies and actors of society often start as a result of a public scandal or in a situation of crisis. They can lead to short-term public relations activism or to long-term reputation gains. On the basis of cases and of a typology of forms of dialogues, the author develops ethical criteria and conditions for a successful dialogue – the ethical basis for such criteria being values such as equality, freedom and participation. A special focus is put on challenges that often result from dialogues such as the ethical judgment of compromises. This article proposes ethical criteria to evaluate compromises. This leads to a model of ethical dialogue.     

Developing a quality prioritization procedure for IPTV service

This study developed a procedure to determine the quality priorities of the internet protocol television (IPTV) service. First, a set of key elements of IPTV service quality was developed based on a literature review and a focus group interview. Second, analytic hierarchy process and the Kano model were applied to identify the requirements of experts and customers, respectively. The experts measured the importance and difficulty of management, whereas the customers measured the satisfaction level and importance of each quality element. Third, quality priorities were calculated through the entropy principle and scenario-based analysis. The proposed procedure is illustrated with a case study of a telecommunications company in Korea.     

The Effects of Four Dimensions of Strategic Orientation on Firm Innovativeness and Performance in Emerging Market Small- and Medium-Size Enterprises

We investigate the effects of technology, entrepreneurial, market, and learning orientations on firm innovativeness, and the mediating effect of firm innovativeness on these relationships, using a survey of 374 small- and medium-size enterprises in Korea. The results reveal that, while technology, entrepreneurial, and learning orientations significantly influence firm innovativeness, firm innovativeness has a significant effect on firm performance. We also find that firm innovativeness has a statistically significant mediating role in the relationships of technology, entrepreneurial, and learning orientations to firm performance. Our study contributes to strategic management and emerging market literature by identifying the pivotal role of innovativeness for firms that seek to benefit from various types of strategic orientations.     

The Effect of Low‐ versus High‐Variance in Product Reviews on Product Evaluation

This research investigates whether the effect of low‐ versus high‐variance product reviews on the evaluation of a product about which consumers have favorable or unfavorable prior expectation can vary depending on product type, the argument quality of product reviews, and the number of reviewers. The data across three laboratory experiments demonstrate that high‐variance product reviews are more likely than low‐variance product reviews to undermine product evaluation when consumers have unfavorable prior expectation about a product. When consumers have favorable prior expectation, however, high‐variance product reviews can enhance or undermine product evaluation depending on product category, the argument quality of reviews, and the number of reviewers. The findings are explained by the type of causal attribution consumers make, such that high‐variance product reviews can allow consumers to make biased product evaluation consistent with their prior expectation when the causes of variance in the product reviews are attributed to the reviewers rather than to the product. However, when the causes of variance are attributed to the product rather than the reviewers, high‐variance product reviews can undermine product evaluation regardless of the favorability of prior expectation.     

Business responses to climate change: strategies for reducing greenhouse gas emissions in Vietnam

This study identifies the climate change strategies adopted by firms in developing countries to reduce their greenhouse gas (GHG) emissions. First, a framework is developed to classify and assess the GHG emission strategies of companies; second, it is then improved by using data on their implementation collected from 185 companies operating in 10 energy-intensive industries in Vietnam. We find that multinational subsidiaries engage in various climate change activities and have a higher level of implementation than those of domestic firms. Further, the most active and proactive companies are large in size and from Europe, the United States and Japan.     

Green financing for sustainable development: Insights from multiple cases of Vietnamese commercial banks

Although the public sector is seen as the main party responsible for taking action on climate change and sustainable development, private commercial banks are in a unique position to support or shift the funding focus on green investment. By employing a qualitative research approach based on six commercial banks, this paper aims to investigate the current practices of how commercial banks are contributing to advance green business initiatives. Accordingly, this research examines and identifies the facilitators and challenges in domestic and foreign commercial banks in Vietnam which support green business initiatives. In addition to addressing the recent calls for the investigation of the role of commercial banks in facilitating green finance, our study expands the emerging literature by demonstrating the current efforts of Vietnam's commercial banks in fostering green finance during the Covid-19 pandemic.