Poverty Reduction Effects of Agricultural Technology Adoption: The Case of Improved Cassava Varieties in Nigeria

We use DNA‐fingerprinting to estimate the poverty reduction effect of adoption of improved cassava varieties in Nigeria. We estimate the counterfactual household income distribution of cassava producers by combining farm‐level treatment effects with a market‐level model. Our results suggest that adoption of improved cassava varieties has led to a 4.6 percentage point reduction in poverty, though this is sensitive to the measurement of adoption status. Therefore, accurate measurement of adoption is crucial for a more credible estimate of the poverty reduction effect of adoption. Our analysis also suggests that farmers who are more likely to be adopters are also likely to face higher structural costs. Addressing structural barriers that make improved technologies less profitable for the poor would therefore be important to increase the poverty reduction effect of improved cassava varieties.     

The moderation influence of warranty on customer satisfaction’s antecedents: an empirical evidence from automotive dealerships

The purpose of this article is to investigate the differential influence of product quality and service quality on customer satisfaction (CS) along with the interaction role of warranty presence in the context of automotive dealerships. Survey-based research methodology is adopted in which the population are the car owners who perform repair and maintenance jobs in authorized service centres. It is found that the warranty moderation role is supported wherein the relationship between service quality and CS is strengthened by the warranty presence, contrary to the insignificant relationship between product quality and CS influenced by the warranty moderator; besides, the empirical results provide an evidence that the CS value relies on metrics comprising operational measures for service quality and product quality. The outcome of this study contributes to sensitizing the decision makers from manufacturing and service disciplines to the interdependencies and the prerequisite for overall collaborative development. This study presents the first systematic approach that differentiates the influence of product quality and service quality on CS, wherein the warranty service is primarily introduced as a moderator affecting the antecedent relationship in the context of automotive dealerships.     

GRAPHICAL MODELS FOR CORRELATED DEFAULTS

A simple graphical model for correlated defaults is proposed, with explicit formulas for the loss distribution. Algebraic geometry techniques are employed to show that this model is well posed for default dependence: it represents any given marginal distribution for single firms and pairwise correlation matrix. These techniques also provide a calibration algorithm based on maximum likelihood estimation. Finally, the model is compared with standard normal copula model in terms of tails of the loss distribution and implied correlation smile.     

Optimal money growth in a limited participation model with heterogeneous agents

This paper studies optimal money growth in a cash-in-advance production economy with heterogeneity in patience levels and know-how. We show that the rate of deflation suggested by the Friedman rule is limited by the subjective discount rate of the most patient agent in the economy. The output distortion due to cash-in-advance constraints on firms can completely be eliminated by means of the Friedman rule if and only if firms are run by the most patient agents.Received: 16 August 2003, Accepted: 22 March 2005, JEL Classification: D52, D90, E21, E41, E52Parts of this paper were completed while the first and second authors were visiting the University of York and Princeton University respectively. We are thankful for the hospitality of these institutions. The second author also acknowledges the hospitality and support of Bilkent University that he is currently visiting, the support from the Turkish Academy of Sciences in the framework of the ‘Distinguished Young Scientist Award Program’ (TUBA-GEBIP/2004), the grant awarded by the Scientific and Technical Research Council of Turkey (TUBITAK) under the NATO Science Fellowship Program as well as the support from the Center for Economic Design of Bogaziçi University. This paper was presented in the ERC/METU Second International Conference on Economics, Ankara, September 1998, and at seminars in Bilkent, Bogaziçi and Ohio State Universities. We thank, in particular, Emre Alper, Sumru Altug, Huw Dixon, Tatsuro Ichiishi, Ivan Pastine, Murat Sertel and Alan Sutherland for useful comments. We also thank two anonymous referees for comments and suggestions. The views expressed in this paper are those of the authors and do not necessarily reflect that of the Central Bank of Republic of Turkey.     

Organizational leadership in Central Asia and the Caucasus: Research considerations and directions

This paper reviews the organizational leadership literature in the post-Soviet countries of Central Asia and the Caucasus. More importantly, we issue a “Clarion Call” for leadership scholars to focus their attention on the region while also providing key considerations and directions for future leadership research in the region. To help encourage and guide future leadership research, the paper provides a comprehensive research framework that identifies factors that need to be incorporated in future research on leadership in the Central Asia and Caucasus countries. We conclude with a discussion of potential research challenges that can arise, as well as research opportunities that are available, as a result of the unique idiosyncrasies of the region known as Central Eurasia.     

Corporate governance and long run performance of seasoned equity issuers

This paper examines the effect of corporate governance on the likelihood of issuing Seasoned Equity Offerings (SEO) between 1990 and 2005. It also examines the long-run post-issue performance using operating and stock return measures. Our results suggest that well-governed firms are less likely to issue equity. Nevertheless, when they do so, they outperform both matching non-issuers and issuers with minimal shareholders’ rights from pre- to post-issue—with the highest operating out-performance occurring in the two post-issue years. A negative correlation exists between the post-issue performance and the anti-takeover measures, primarily, the protection associated with management entrenchment. Nonetheless, measures of board structure do not appear to affect the post-issue operating performance. Overall, corporate governance appears to be an effective internal control mechanism that restrains managers’ incentives to either take an SEO issuance decision that does not serve the interests of shareholders or invest the capital raised in value-destroying projects.     

Production function for wheat: a case study of Southeastern Anatolian Project (SAP) region

Functions for total wheat production, the major agricultural crop of Gaziantep, Sanliurfa, Diyarbakir, and Mardin provinces in Southeastern Anatolian Project (SAP) region in Turkey were developed by using annual data lor the 1963-1989 period. Regression analyses were carried out on the multiple-linear, quadratic, and Cobb-Douglas functional forms of total wheat production in the region effected by cultivation area, fertilizer usage, and rainfall. From the economical theories' point of view the model revealed good insight. The models were statistically significant at the 95% confidence level. Irrigation is valued quite substantially. Output elasticities of inputs are less than 1 and function coefficient is elastic. Thus input employment can be increased to increase wheat production. Further research based on factor analysis is recommended.     

The impact of racial diversity on intermediate and long‐term performance: The moderating role of environmental context

We conduct a firm‐level, 6‐year longitudinal analysis on the impact that racial diversity in human resources has on financial performance. When considering short‐term performance outcomes, we predict a curvilinear relationship between diversity and performance (i.e., firm productivity). Although we find evidence of a U‐shaped relationship between racial diversity and productivity, the relationship is stronger in service‐oriented relative to manufacturing‐oriented industries and in more stable vs. volatile environments. For longer‐term profitability, we propose and find support for more of a positive linear relationship between diversity and performance (i.e., Tobin's q) than a nonlinear one. This linear effect is stronger and more positive in munificent compared to resource‐scare environments. Thus, we aid in reconciling existing, often contradictory, studies by demonstrating the potential short‐term vs. long‐term impact of racial diversity on performance. We offer implications for future research on diversity considering the current and projected demographic landscape. Copyright © 2007 John Wiley & Sons, Ltd.