The economic production quantity (EPQ) with shortage derived algebraically

Previously, in several papers and textbooks, the classical economic order quantity (EOQ) and the economic production quantity (EPQ) formulas for the shortage case, have been derived using differential calculus and solving two simultaneous equations (derived from setting the two first partial derivatives to zero) with the need to prove optimality conditions with second-order derivatives. In a previous original piece of work, a new approach to find the EOQ with backlogging using some slight algebraic developments appeared. This paper extends the mentioned algebraic approach to the EPQ formula taking shortages into consideration within the case of only one backlog cost per unit and time unit. The final expressions provide the same formulas that are available in the classic textbooks on inventory theory.     

Performance Heterogeneity in Latin America: An Investigation into the Transient Effects of Country of Origin

The heterogeneity of firm performance has been studied from the perspective of factors, including the firm effect, the industry effect, and the country effect. This study emphasizes the importance of country transient effects in light of the volatility present in Latin American countries. Variance decomposition was carried out for the economic and operational performance of five countries in the period from 1998 to 2007. The results show that country effects matter for Latin America, its transient effects increase in periods of higher turbulence, and have a greater effect on a firms' economic performance than on its operational performance.     

Comprehensive Homeowners Microinsurance in Brazil: Estimation of Pricing and Market Potential

This study examines the question of comprehensive microinsurance for Brazilian homeowners. In particular, the study calculates (i) pricing for selected types of microinsurance homeowner's coverages and insured amounts and (ii) the estimated market potential of this product. The Brazilian agency charged with responsibility for regulation of private insurance, SUSEP, has determined that microinsurance should be aimed at families with a monthly per capita income of up to two minimum wages. According to this criterion, the study finds that there are more than 42 million households in Brazil eligible for microinsurance. The study also finds that microinsurance premiums for these households would be very low (US $0.97 to 2.03 per month)—less than 1% of average household income. This type of insurance would certainly be viable, considering the calculated market size of approximately US $780 million per year. These figures show that there is significant potential for the expansion of the microinsurance market in Brazil.     

A No‐Arbitrage Fractional Cointegration Model for Futures and Spot Daily Ranges

The no‐arbitrage relation between futures and spot prices implies an analogous relation between futures and spot daily ranges. The long‐memory features of the range‐based volatility estimators are analyzed, and fractional cointegration is tested in a semi‐parametric framework. In particular, the no‐arbitrage condition is used to derive a long‐run relationship between volatility measures and to justify the use of a fractional vector error correction model (FVECM) to study their dynamic relationship. The out‐of‐sample forecasting superiority of FVECM, with respect to alternative models, is documented. The results highlight the importance of incorporating the long‐run equilibrium in volatilities to obtain better forecasts, given the information content in the volatility of futures prices. © 2011 Wiley Periodicals, Inc. Jrl Fut Mark 33:77–102, 2013     

Brazilian Consumer Preferences for Processed Tomato Packaging Using Conjoint Analysis

Brazil is the largest producer and consumer of processed tomato products in Latin America. However, the consumption preferences related to this product are poorly studied. The aim of this study was to evaluate the influence of certain characteristics of processed tomato product packaging on Brazilian consumer preferences. The revised Personal Involvement Inventory (PII) and conjoint analysis (CA) were applied to 206 consumers in Brazil. Four packaging attributes were evaluated: colour (green, red, and yellow); material (sachets, tin, and brick carton packaging); the presence of additional information; and the presence of “easy-open” devices. The CA technique showed that in general, the Brazilian participants were influenced positively by red brick carton and sachet packaging and by the presence of additional information and a device that facilitated opening the package. The results presented in this study are useful for the food industry to develop packaging and marketing strategies using consumer profiles.     

Trade and the Effect of Public Investment on Regional Inequalities in Heterogeneously Integrated Areas

Regional integration, it is argued, challenges the distribution of economic activity among regions. However, the government role in shifting the patterns of regional inequalities is still under debate and has received small comprehensive empirical evidence. This paper examines the hypothesis of trade as channelling public investment and, thus, perpetuating regional inequalities. We argue that the interplay of public and private investment plays a key role in stimulating trade and economic activity. To avoid problems of cross‐country heterogeneity and comparability this study examines data for two countries; Mexico and Spain, both followers of trade integration arrangements. Findings indicate that regional inequalities in Mexico are significantly explained by differences in export capacity serving to boost private investment whereas inequalities in Spain are appreciably driven by previous endowments and private capital formation.     

Optimal close-to-home biases in asset allocation

This article studies optimal portfolio decisions with (long-term) liabilities for small open economy based investors, including the optimality of currency hedging (Walker (2008a). Chile is the home country of the representative investor, but results are likely to hold more generally. The problem is set up as in [Sharpe & Tint, 1990] and [Hoevenaars et al., 2007]. Hedging the liabilities and the consumption currency may imply optimal close-to-home biases, defined as overweighting asset classes which are highly correlated with local ones. The implementation challenges include: developing a methodology to estimate expected returns in local (real) currency; estimating the covariance matrix allowing for serial and crossed-serial correlations; and checking the results' robustness using a resampling method. The findings are: (i) portfolios always have optimal close-to-home biases, beyond the investment in local fixed income to hedge liabilities; (ii) currency hedging reduces investment in close-to-home asset classes, (iii) but has ambiguous effects on welfare — detected with the resampling method; (iv) currency hedged long-term US bonds are useful for hedging local interest rate risk; and (v) liabilities give access to high risk-return portfolios, not affecting otherwise the overall shape of the efficient regions. This article can be useful to investors based on small open economies, including pension funds, insurance companies, sovereign wealth funds and Central Banks.     

A New Scale to Measure Executive Servant Leadership: Development,Analysis, and Implications for Research

This article introduces a new scale to measure executive servant leadership, situating the need for this scale within the context of ethical leadership and its impacts on followers, organizations and the greater society. The literature on servant leadership is reviewed and servant leadership is compared to other concepts that share dimensions of ethical leadership (e.g., transformational, authentic, and spiritual leadership). Next, the Executive Servant Leadership Scale (ESLS) is introduced, and its contributions and limitations discussed. We conclude with an agenda for future research, describing ways the measure can be used to test hypotheses about organizational moral climate, ethical organizational culture, corporate responsibility, and institutional theory.     

An ethical argument for host country workforce training and development in the expatriate management assignment

This paper seeks to establish the ethical foundation of MNCs' responsibility for providing host country workforce (HCW) preparation and training attendant to the new expatriate management assignment. It argues that such moral responsibility arises from a set of correlative duties which MNCs acquire as business institutions. They include duties involving the expatriate manager, the HCW, and the host nation to (1) assist all employees, including the expatriate manager, in the successful execution of their assignments; (2) avoid the semblance of discriminatory treatment; (3) encourage full status integration into a global economy; (4) foster personal enlightenment and self-enrichment; (5) help individuals develop useful, marketable skills; (6) contribute to the development of a greater and more functional national labor skill base; and (7) encourage a long-term focus on creating enduring value for a maximum number of stakeholders, rather than upon short-term and shortsighted profit for only a few. Some important cautions and considerations related to HCW training implementation are then discussed.Charles M. Vance, associate professor of management at Loyola Marymount University in Los Angeles, has both a domestic and international focus on human resource management and learning system design to enhance organizational performance. He has several publications, and his new book,Mastering Management Education (Sage Publications), is to be published in 1993.Eduardo S. Paderon is the Associate Dean of the Hagan School of Business of Iona College in New Rochelle, New York. He teaches graduate courses on Business Policy and Business and Society. His writings and other scholarly activities, including presentations at national and international conferences, focus on business ethics and cross-cultural value studies.     

On the index tracking and the statistical arbitrage choosing the stocks by means of cointegration: the role of stock picking

In this paper, we propose a new methology for Index Tracking (IT) by means of cointegration which provides some significant improvements on that field. As the quality of the tracking portfolio (TP) depends highly on the stock selection procedure, we propose picking the stocks using a model selection technique based on optimizing the cointegration level of the TP and the benchmark index instead of selecting, as in previous papers the assets by ad hoc decisions. To illustrate an empirical application of these techniques we use daily closing prices in the Dow Jones Industrial Average (DJIA) index over two different periods; one period which goes from 1 January 1990 to 31 December 2001 previously used by other authors, and the bear and a turmoil period, which goes from January 2007 to May 2012, inside the current financial crisis. Using only five assets we are able to successfully track the DJIA index and our results improve the IT technique based on cointegration that chooses stocks with maximum capitalization level. We also have compared our results with a more traditional procedure based on correlation and again our results reveal superiority. The empirical illustration not only has been focused on the TP itself, but has also been extended to tracking the index with an added profitability of 5, 10, 15 or 20% and to long-short strategies, producing profitable results.