Weak Disposability in Nonparametric Production Analysis: Reply to Färe and Grosskopf

Färe and Grosskopf (this issue) claim that a single abatement factor suffices for modeling weak disposability in nonparametric production models, and that the Kuosmanen (2005) technology that uses multiple abatement factors is larger than necessary. This article demonstrates by a numerical example that a single abatement factor does not suffice to capture all feasible production plans, and that its use leads to the violation of convexity, one of the maintained assumptions of the model. We also prove that the Kuosmanen technology is the correct minimum extrapolation technology under the stated axioms.     

Field publishing performance of U.S. economics departments

Conclusion The purpose of this study is to reduce information costs in the market for graduate education in economics and the market for Ph.D. economists by providing information on research concentration in each of 19 fields for 1980–1986. Some variation in publishing performance across fields is found in highly regarded universities. Unexpected faculty strength is discovered in some middle level departments for particular fields. Among middle- and lower-ranked departments, substantial publishing diversity across fields is evident.     

Innocents Abroad: Attitude Change toward Hosts

The purpose of this study was to examine the role of social distance, prior expectations, and trip experience on post-trip attitudes in multiple destinations. This study is based on surveys conducted with two groups of students: 1) a group participating in a summer study abroad program to the South Pacific or to Europe, and 2) a control group. The results show that attitude changes were positive towards Europeans, negative towards Australians, and mixed towards Fijians. This study supports the expectation value theory, but contradicts the cultural distance theory of attitude change. Further, the results show that experience with non-tourism related services played an important role toward attitude change.     

Informational Contagion of Sudden Stops in a Global Games Framework

This paper highlights the cross-country spread of self-fulfilling financial crises through an informational channel. It sets up a two-country framework of investment with strategic complementarities and incomplete information about economic fundamentals. Each market may be subject to sudden stops, triggered by agents preemptively withdrawing their investments for fear others do so. After observing a massive capital outflow from one country, agents downgrade common fundamentals, and therefore have higher requirements regarding factors specific to the other country. This in turn may induce a crisis in the latter, which is not justified by idiosyncratic events or economic interdependence.     

Disease management programs: program intervention, behavior modification, and dosage effect

Disease management programs provide highly personalized self- management support to consumers afflicted with chronic illnesses. Program interventions include the provision of health information, ongoing motivation, and support for behavior change, adherence to pharmacotherapy, development of self-efficacy, and the distribution of self-care tools. Interactions between program and patients are structured and repetitive over time. Consumer behavior change can result in measurable improvements in quality and medical cost savings from postponement or avoidance of preventable complications. We evaluated the impact on cost and quality of a comprehensive Diabetes Disease Management Program (DDMP) across ten US urban markets. A staggered implementation allowed for ten pre–post and five pair-wise comparisons. The DDMP demonstrated significant improvements in six diabetes-related quality indicators, lower cost, and a dose-response with greater than 6 months participation. We conclude that a DDMP improves quality of care and reduce overall medical costs.     

Information systems project management decision making: The influence of experience and risk propensity

Managing information systems (IS) projects is a notoriously difficult task. The project manager is a crucial player in a successful IS development project. This research examines how a project manager's prior experience and risk propensity influence his or her decision making. An experiment was conducted that showed that both experience and risk propensity have significant influence on the decisions made.     

From Birth through Transition to Maturation: The Evolution of Technology‐Based Alliance Networks

This article considers the evolution of interfirm networks within a context of technological change. More specifically, it studies the evolution of structural and positional embeddedness in a network of technology‐based alliances when it moves from an early period of invention creation to a subsequent period of new product development and commercialization. Empirically, we study the evolution of technology‐based alliance networks in the biopharmaceutical industry over a period of about 25 years, from 1975 until 1999. Examining interorganizational networks over such an extended time period allows us to move beyond more static approaches that have characterized most network studies until now, and consider network evolution along its various phases of birth, growth, and early maturation instead. Our findings indicate that the evolution of both structural and positional embeddedness does not follow the common idea of a path of linear progression, but instead strongly exhibits nonlinearity by resembling a sigmoid pattern. These findings have a number of implications. First, the break in the process of linear progression contrasts with the standing literature that (implicitly) assumes the informational and resource value of a network structure to remain constant over time or to evolve linearly from carrying low value to progressively higher value. Instead, our finding that the evolution of structural and positional embeddedness is nonlinear echoes the speculative idea, as expressed by Gulati and Garguilo, that network change may possibly be nonlinear when seen over the long run. A second implication concerns the validity of standing insights from the social network literature such as Coleman's theory of social capital and Burt's theory of structural holes. These theories may not apply to the extent that there are strong changes in environmental conditions like environmental uncertainty and/or munificence, such as during a transition phase as considered in this study.