Approximate equilibria in markets with indivisible commodities

This paper presents results on the existence of approximate equilibria in large but finite exchange economies in which all the traders have non-convex consumption sets. As such, the paper gives a natural extension, to the finite economy, of Mas-Colell's results on existence with indivisible commodities and a continuum of agents. It also presents an approximate equilibrium theorem without any assumption of compactness or bounded non-convexity of preferences.     

Cannibalism and the Optimal Sharing of the North-East Atlantic Cod Stock: a Bioeconomic Model

This paper shows how intra-stock relations such as cannibalism and growth enhancement, determine the economically optimal sharing of a fish resource between heterogeneous harvesting agents. The sharing of resources between different vessel groups is often left for political decision making. Nonetheless, such decisions may have both biological and economic consequences. This becomes quite clear when different harvesting groups exploit different sections (age groups) of a stock that has intra-stock interactions in the form of cannibalism. A two-agent bioeconomic model with cannibalism is developed and used to determine (i) optimal annual harvest sizes (TACs) for cod, and (ii) the optimal proportion of the TAC that should be harvested by the different vessel groups in the fishery. Applying biological and economic data in a numerical procedure, and comparing the results obtained to previous studies, it is shown that intra-stock interactions such as the presence of cannibalism has a significant impact on who should take what proportion of the TAC, and hence, the standing stock size and discounted economic rent achievable. In contrast to other studies, we find that the optimal harvest requires that both trawlers and coastal vessels should harvest the fish resource. In addition, the results indicate that, from a bioeconomic perspective, the existing trawler fleet’s harvest share in the cod fishery is too high. This revised version was published online in August 2006 with corrections to the Cover Date.     

Enhancing food security in South Sudan: the role of markets and regional trade

South Sudan faces serious problems of food insecurity due to low levels of domestic food production, periodic droughts, widespread poverty, and since late 2013, renewed armed conflict. This article explores market price behavior using cointegration analysis and estimates the effects of production and trade shocks through multimarket model simulations. We show that market prices in the capital city, Juba, of both maize and sorghum are cointegrated with import parity prices of these cereals sourced from Uganda, consistent with observed trade flows. Model simulations, using econometrically estimated demand parameters, suggest that private sector imports of maize and wheat would greatly mitigate the potential fall in consumption in the case of a decline in domestic cereal production. Other simulations indicate that if total imports of cereals are reduced by one‐third (still more than two times the levels of food aid in 2013) because of disruptions to private market flows, domestic prices of cereals could rise by 45% or more. The article concludes that whatever measures are taken involving national food security reserves, it is crucial that government policy serves to maintain incentives for private sector imports to avoid destabilizing market supplies, domestic prices, and ultimately, food consumption of the poor.     

Exchange rate fluctuations,firm size,and export behavior: an empirical investigation

In this paper, we examine how changes in the exchange rate and its volatility affect the export behavior of manufacturing firms. We also investigate whether both exchange rate changes and exchange rate volatility affect firms of different sizes differently. Applying the two-step system generalized method of moment estimator on our data for a sample of 221 Pakistani manufacturing firms, we find that the real exchange rate depreciation has positive impacts, whereas the exchange rate volatility has negative impacts on firms’ exports. We also find that compared to large-sized firms, small- and medium-sized exporting firms are more likely to benefit from currency depreciations. Yet, regarding the effect of exchange rate volatility, we find that the adverse impact of exchange rate volatility is weaker for large-sized firms as compared to small- and medium-sized firms. Our findings confirm the presence of nonlinearity in export-deterring (favoring) effects of exchange rate volatility (depreciation) on exporting behavior depending on firm size. Pakistan should design and implement export-favoring preferential policies by emphasizing on real exchange rate stabilization and providing incentives to large firms to come into being. Small- and medium-sized enterprises should develop such export strategies that help reduce their size disadvantages, particularly in managing exchange rate risks.     

Economic impact of ocean fish populations in the global fishery

Our goal in this paper is to estimate the total output in an economy that is currently dependent (at least partially) on current fisheries output. We therefore applied the Leontief technological coefficients at current production and then estimate total output supported throughout the economy at the current level of production. Estimates of gross revenue from capture fisheries suggest that the direct value of output for this sector is US $80–85 billion annually (Sumaila et al., Journal of Bioeconomics 9(1):39–51, 2007; Willmann et al., The Sunken Billions, World Bank, FAO, Washington DC, Rome, 2009). However, as a primary or a potential economic base industry, there are a vast number of secondary economic activities—from boat building to international transport—that are supported by world fisheries, yet these related activities are rarely considered when evaluating the economic impact of fisheries. This study applies an input–output methodology to estimate the total direct, indirect, and induced impact of marine capture fisheries on the world economy. While results suggest that there is a great deal of variation in fishing output multipliers between regions and countries, when we apply the output multipliers to the capture fisheries sector at the global level, we find that significant indirect and induced effects place the impact of this sector to world output nearly three times larger than the value of landings at first sale, at between US $80–85 billion annually (Sumaila et al., Journal of Bioeconomics 9(1):39–51, 2007; Willmann et al., The Sunken Billions, World Bank, FAO, Washington DC, Rome, 2009). However, as a primary or a potential economic base industry, there are a vast number of secondary economic activities—from boat building to international transport—that are supported by world fisheries, yet these related activities are rarely considered when evaluating the economic impact of fisheries. This study applies an input–output methodology to estimate the total direct, indirect, and induced impact of marine capture fisheries on the world economy. While results suggest that there is a great deal of variation in fishing output multipliers between regions and countries, when we apply the output multipliers to the capture fisheries sector at the global level, we find that significant indirect and induced effects place the impact of this sector to world output nearly three times larger than the value of landings at first sale, at between US 225 and 240 billion per year.     

Consumer-based brand equity (CBBE) and the role of social media communications: Qualitative findings from the Malaysian automotive industry

Previous studies on consumer-based brand equity (CBBE) have maintained that CBBE is a multidimensional construct which reflects both consumers’ perceptions and attitudes. However, only few of the extant CBBE models emanate from the context of automotive brands. As such, this present study employs a qualitative approach using a semi-structured face-to-face interview among 11 informants, to explore the concept of CBBE in the context of automotive brands. Also, this study explores the role of social media communications in developing CBBE for automotive brands. The findings of this research demonstrate that CBBE is a valid concept which reflects consumers’ perception and mindset towards their knowledge, which are reflected through brand awareness, hedonic brand image, functional brand image, and brand sustainability of automotive brands. Additionally, the marketing activities and communication contents on social media play an important role in improving the perception of automotive brands in consumers’ minds, hence the development of automotive CBBE. The theoretical implications of these research findings are that this study provides an insight into the feasibility of developing a specific CBBE model for automotive brands. Practically, this study presents insights for brand manager on the importance of developing CBBE through social media communications.     

Sustainability Practices and Corporate Financial Performance: A Study Based on the Top Global Corporations

Sustainability is concerned with the impact of present actions on the ecosystems, societies, and environments of the future. Such concerns should be reflected in the strategic planning of sustainable corporations. Strategic intentions of this nature are operationalized through the adoption of a long-term focus and a more inclusive set of responsibilities focusing on ethical practices, employees, environment, and customers. A central hypothesis, that we test in this paper is that companies which attend to this set of responsibilities under the term superior sustainable practices, have higher financial performance compared to those that do not engage in such practices. The target population of this study consists of the top 100 sustainable global companies in 2008 which have been selected from a universe of 3,000 firms from the developed countries and emerging markets. We find significant higher mean sales growth, return on assets, profit before taxation, and cash flows from operations in some activity sectors of the sample companies compared to the control companies over the period of 2006–2010. Furthermore, our findings show that the higher financial performance of sustainable companies has increased and been sustained over the sample. Notwithstanding sample limitation, causal evidence reported in this paper suggests that, there is bi-directional relationship between corporate social responsibilities practices and corporate financial performance.     

Corporate governance and corporate social responsibility (CSR) reporting: an empirical evidence from commercial banks (CB) of Pakistan

The aim of this paper is to explore Pakistani listed commercial banks corporate social responsibility (CSR) reporting information along with the probable effects of different corporate governance (CG) elements on CSR disclosures. Furthermore, the relevance of different theories in explaining the results of this study is also provided. For analyzing the banks’ CSR reporting practice, which was done using content analysis, the annual reports for the years 2005–2010, of all the commercial banks were examined. Non-executive directors and foreign directors which are elements of CG were considered and multiple regression analyses were carried out to check the impact of CG elements on banks’ CSR reporting initiatives. The results of the study reveal that even though reporting of CSR is voluntary in Pakistan, the participation of Pakistani commercial banks in different CSR activities is not low. Furthermore, the level of CSR activities performed by the banks is impressive. The results displayed that non-executive directors have a positive impact on the CSR reporting supporting stewardship theory in CB of Pakistan. The major limitation of this study is that the data is only based on annual reports of commercial banks of Pakistan. It is therefore, not easier to generalize the findings of this research to other corporate sectors. Secondly the annual reports of commercial banks for the years 2005–2010, a time period of just 6 years were analyzed as access to data before and after the specified years was not readily available. This paper relates CSR disclosure with possible impact of CG in the particular perspective of a transitional economy’s banks such as Pakistan. By providing empirical facts of the effect of CG structure on the CSR activities practices in developing countries’ banking sector setting, this paper provides novel contribution to the current CSR literature.     

Economy-wide benefits from water-intensive industries in South Africa: Quasi-input-output analysis of the contribution of irrigation agriculture and cultivated plantations in the Crocodile River catchment

A quasi-input-output framework was employed to measure and compare economy-wide benefits from irrigated crops and cultivated plantations in the Crocodile River catchment. The results of the analysis showed that it makes a huge difference to consider not only direct economic benefits from water-using activities, but also their economy-wide benefits and multisector linkages for evaluating water allocation regimes and policies. A completely opposite ranking of the compared activities was obtained when economy-wide effects (including indirect multipliers) were taken into account, compared with considering only direct benefits.