Selection of influential variables in ordinal data with preponderance of zeros

Presence of excess zero in ordinal data is pervasive in areas like medical and social sciences. Unfortunately, analysis of such kind of data has so far hardly been looked into, perhaps for the reason that the underlying model that fits such data, is not a generalized linear model. Obviously some methodological developments and intensive computations are required. The current investigation is concerned with the selection of variables in such models. In many occasions where the number of predictors is quite large and some of them are not useful, the maximum likelihood approach is not the automatic choice. As, apart from the messy calculations involved, this approach fails to provide efficient estimates of the underlying parameters. The proposed penalized approach includes ?₁ penalty (LASSO) and the mixture of ?₁ and ?₂ penalties (elastic net). We propose a coordinate descent algorithm to fit a wide class of ordinal regression models and select useful variables appearing in both the ordinal regression and the logistic regression based mixing component. A rigorous discussion on the selection of predictors has been made through a simulation study. The proposed method is illustrated by analyzing the severity of driver injury from Michigan upper peninsula road accidents.     

Resource saving and productivity enhancing impacts of crop management innovation packages in Ethiopia

Crop management innovations are often not discrete fixed stand‐alone options—and their adoption may imply various combinations and adaptations. This potentially confounds their impact assessment. This article assesses the resource saving and productivity enhancing impacts of a crop management package revolving around minimum tillage in maize‐based farming systems in northwest Ethiopia. An endogenous switching regression model was applied to plot‐ and household‐level survey data collected from 290 rural households operating 590 maize plots during the 2012 production year. Controlling for variations in plot and household characteristics, the average effect of minimum tillage package (minimum tillage package) on maize productivity is 0.44 t/ha. Compared to conventional practice (CP), adoption of the MTP decreased the average male and female labor use in maize production by 14.4 and 8.2 person‐days per ha, respectively. Similarly, MTP adoption decreased draft power use for land preparation by 13.2 pair of oxen‐days per ha. Compared to CP, in general, there is a considerable short‐run maize productivity gain and reduction in labor and draft power use under MTP.     

Current account dynamics and capital mobility in the newly industrialized countries

This paper examines the current account dynamics in a group of ten newly industrialized countries (NICs) during the period 1980–2012 using a panel error-correction model. The model is also used to empirically test whether the degree of capital mobility is positively related to financial openness. The Chin-Ito (2006, 2008) financial openness index is used to classify the countries into different groups, and we place the countries in one group that are similar to each other in terms of their financial openness. Furthermore, to evaluate the extent of capital mobility over the different period from 1980 to 2012, the total period under study is divided into three sub-periods. The estimation results indicate that there exist long-run equilibrium relationships between domestic saving, investment, and current account in all groups regardless of their degree of financial openness. We find that more openness in terms of the capital account is associated with a higher degree of capital mobility in the case of NICs. The empirical result also indicates that the degree of capital mobility is higher in the first and third sub-period.     

Shaping of Moral Intensity Regarding Software Piracy: A Comparison Between Thailand and U.S. Students

Software piracy is a major global concern forbusinesses that generate their revenues throughsoftware products. Moral intensity regardingsoftware piracy has been argued to be relatedto the extent of software piracy. Anunderstanding of the development of moralintensity regarding software piracy inindividuals would aid businesses in developingand implementing policies that may help themreduce software piracy. In this research westudied the similarities and differences indevelopment of moral intensity regardingsoftware piracy among university students intwo different cultures, the U.S. and Thailand. In particular, we studied the influence of theimmediate community of individuals, such asother students, faculty, and other universityemployees, on the development of moralintensity regarding software piracy of the twogroups of students. Results indicate that, ingeneral, there are significant differences inmoral intensity regarding software piracybetween students from the US and Thailand, andthat gender differences also exist. Though theeffect of the immediate community on theself-perception of moral intensity regardingsoftware piracy of students was significant,there appears to be very little significantdifferences in this effect between the studentsin the two different countries studied. Thefindings have implications for teachingbusiness ethics, and for developing andimplementing policies to curb global softwarepiracy.     

Are there monitoring benefits to institutional ownership? Evidence from seasoned equity offerings

We provide new evidence on the monitoring benefits from institutional ownership by analyzing the impact of institutional ownership on stock price and operating performance following seasoned equity offerings, a setting where the effects of monitoring are likely to be especially important. We find that announcement returns are positively and significantly related to total and active institutional ownership levels and concentration. Post-issue stock returns are positively and significantly related to the contemporaneous post-issue changes in total and active institutional ownership and the concentration of their shareholdings. Operating performance improvements are also related to institutional monitoring in the one, two, and three years following the equity issue. Our results continue to hold even after accounting for the possibility that institutional investors have an informational advantage that enables them to identify and invest in subsequently better performing firms. We also empirically eliminate the possibility that our findings are driven by institutions buying past winners and selling past losers as a way to window-dress their portfolio holdings.     

Principal Theory and Principle Theory: Ethical Governance from the Follower’s Perspective

Organizational governance has historically focused around the perspective of principals and managers and has traditionally pursued the goal of maximizing owner wealth. This paper suggests that organizational governance can profitably be viewed from the ethical perspective of organizational followers – employees of the organization to whom important ethical duties are also owed. We present two perspectives of organizational governance: Principal Theory that suggests that organizational owners and managers can often be ethically opportunistic and take advantage of employees who serve them and Principle Theory that focuses on guiding principles that are sometimes taken too far in organizations. In introducing these two new organizational governance perspectives, we offer insights into the value of rethinking ethical duties owed to organizational followers. Cam Caldwell received his Ph.D. from Washington State University where he was a Thomas S. Foley Graduate Fellow. Dr. Caldwell is Editor of the Academy of Management Ethics website and a member of the Academy’s Ethics Committee. His research is primarily in the areas of ethical leadership, organizational governance, and developing organizational trust. Prior to obtaining his Ph.D., Caldwell worked for 25 years as a city manager, human resource director, and management consultant. Ranjan Karri is Assistant Professor of Management at Bryant College. He received his Ph.D. in strategic management from Washington State University. His research interests include corporate and business strategies, ethical leadership and corporate governance. Pamela Vollmar is an undergraduate student at the University of Houston – Victoria majoring in Business Management. She has worked for 25 years as an electrical specialist for a major engineering firm.     

An empirical assessment of the value of irrigation water: the case study of Murrumbidgee catchment*

Evaluation of value of irrigation water is essential for supporting policy decision making relating to investments in the irrigation sector, efficient allocation of irrigation water and water pricing and for crafting policies to compare the variable impacts of water reform within and across sectors of the economy. This paper asks the question of how much an established irrigator would pay for water and at what price farmers planning to expand the area they have under irrigation would consider paying for the right to access water. An analytical framework is developed to estimate the net present value of both annual and perennial agricultural activities in the Murrumbidgee catchment. Using these estimates the total value of water used in Murrumbidgee catchment is estimated. An aggregate water supply curve is derived for the catchment from where water may be acquired from irrigators for environmental flows.     

An analysis of delayed formal and interlinked informal credit in agriculture

A model of interlinked credit-product contracts between small farmers and large farmers when the small farmer faces delay in getting formal credit and the large farmer does not, has been developed. The small farmer remains on the reservation income level, and his reservation income is inversely related to the length of the delay. However, this does not hamper the productivity of the small farmer. The large farmer extracts the surplus through the interlinked contract and this surplus is positively related to the length of the delay. Interlinkage and non-inter-linkage equilibria become identical if the small farmer gets the formal credit at the beginning of the crop cycle. Various subsidy policies worsen the distribution of formal credit.     

Regional foreign direct investment and technology spillover: evidence across different clusters in India

This paper examines whether there exist productivity spillovers from foreign direct investment (FDI) to domestic firms at the regional level, using firm-level panel dataset covering 22 manufacturing industries in India from 2000 to 2012. In order to estimate the productivity spillovers from FDI at the regional level, we select 10 industrial clusters across 4 regions in India. In estimating productivity, we control for a possible simultaneity bias by using semi-parametric estimation techniques. We find that local firms benefit from horizontal and vertical FDI, but the benefits from the latter are found to be substantially stronger. The absorptive capacity of domestic firms is highly relevant to harvest the spilled technology from foreign-owned firms. Furthermore, we find that domestic firms belonging to high-technology industries benefit more from FDI at the regional level. We also find that market concentration is a crucial conduit for firm innovation, technological upgradation, and having a direct effect on local firm total factor productivity.     

Offshoring and unemployment: The role of search frictions labor mobility

In a two-sector, general-equilibrium model with labor-market search frictions, we find that the wage increases and sectoral unemployment decreases upon offshoring in the presence of perfect intersectoral labor mobility. If, as a result, labor moves to the sector with the lower (or equal) vacancy costs, there is an unambiguous decrease in economywide unemployment. With imperfect intersectoral labor mobility, unemployment in the offshoring sector can rise, with an unambiguous unemployment reduction in the non-offshoring sector. Imperfect labor mobility can result in a mixed equilibrium in which only some firms offshore, with unemployment in the offshoring sector rising.