Showing papers in "ERIM report series research in management Erasmus Research Institute of Management in 2007"

VOS: A New Method for Visualizing Similarities between Objects

Abstract: We present a new method for visualizing similarities between objects. The method is called VOS, which is an abbreviation for visualization of similarities. The aim of VOS is to provide a low-dimensional visualization in which objects are located in such a way that the distance between any pair of objects reflects their similarity as accurately as possible. Because the standard approach to visualizing similarities between objects is to apply multidimensional scaling, we pay special attention to the relationship between VOS and multidimensional scaling.

The Debate on Influencing Doctors’ Decisions: Are Drug Characteristics the Missing Link?

Abstract: textDecision-making by physicians on patients’ treatment has come under increased public scrutiny. In fact, there is a fair amount of debate on the effects of marketing actions of pharmaceutical firms toward physicians and their impact on physician prescription behavior. While some scholars find a strong and positive influence of marketing actions, some find only moderate effects, and others even find negative effects. Debate is also mounting on the role of other influencers (such as patient requests) in physician decision-making, both on prescriptions and sample-dispensing. The authors argue that one factor that may tip the balance in this debate is the role of drug characteristics, such as a drug’s effectiveness and a drug’s side effects. Using a unique data set, they show that marketing efforts – operationalized as detailing and symposium meetings of firms to physicians – and patient requests do affect physician decision-making differentially across brands. Moreover they find that the responsiveness of physicians’ decision-making to marketing efforts and patient requests depends upon the drug’s effectiveness and side effects. The paper presents clear guidelines for public policy and managerial practice and envisions that the study of the role of drug characteristics – such as effectiveness and side effects – may lead to valuable insights in this surging public debate.

Entrepreneurial Diversity and Economic Growth

Abstract: textMost studies investigating the relationship between entrepreneurship and economic growth treat entrepreneurs as a homogeneous group. This study investigates the impact of entrepreneurial diversity on national economic growth. Using data for 36 countries participating in the Global Entrepreneurship Monitor we investigate whether the impact on growth depends on socio-demographic diversity in entrepreneurship (in terms of age, education and gender). We find that in less developed countries older and higher educated entrepreneurs are particularly important for stimulating economic growth, while for developed countries younger entrepreneurs are more important. Accordingly, policy should aim at stimulating particular groups of entrepreneurs, rather than just the number of entrepreneurs.

Strategic and Operational Management of Supplier Involvement in New Product Development: a Contingency Perspective

Abstract: This paper examines how firms succeed to leverage supplier involvement in product development. The paper extends earlier work on managing supplier involvement by providing an integrated analysis of results, processes and conditions both at the level of individual development projects and the overall firm. Following a multiple-case study approach with theoretical sampling, the study is carried out by examining eight projects in which four manufacturers from different industries involve multiple suppliers. The findings suggest that successful supplier involvement is dependent on the coordinated design, execution and evaluation of strategic, long-term processes and operational, short-term management processes and the presence of enabling factors such as a cross-functional oriented organization. The required intensity of these processes and enablers depends on contingencies such as firm size and environmental uncertainty. In contrast with previous research, we find no indications that managing supplier involvement requires a different approach in highly innovative projects compared to less innovative projects.

Developing and Testing a Measure for the Ethical Culture of Organizations: The Corporate Ethical Virtues Model

Abstract: textBased on four interlocking empirical studies, this paper initially validates and refines the Corporate Ethical Virtues Model which formulates normative criteria for the ethical culture of organizations. The findings of an exploratory factor analysis provide support for the existence of eight unidimensional subscales: clarity, congruency of supervisors, congruency of management, feasibility, supportability, transparency, discussability, and sanctionability. The findings of a confirmatory factor analysis show that the overall fit of the model is quite high. Evidence of convergent and discriminant validity is also found. The resulting 58-item self-reporting questionnaire is a useful tool that can be used in future research and by managers in assessing the ethical culture of their organization.

Flexible Decision Control in an Autonomous Trading Agent

Abstract: An autonomous trading agent is a complex piece of software that must operate in a competitive economic environment and support a research agenda. We describe the structure of decision processes in the MinneTAC trading agent, focusing on the use of evaluators – configurable, composable modules for data analysis and prediction that are chained together at runtime to support agent decision-making. Through a set of examples, we show how this structure supports sales and procurement decisions, and how those decision processes can be modified in useful ways by changing evaluator configurations. To put this work in context, we also report on results of an informal survey of agent design approaches among the competitors in the Trading Agent Competition for Supply Chain Management (TAC SCM).

From Closed-Loop to Sustainable Supply Chains: The WEEE case

Abstract: textThe primary objective of closed-loop supply chains (CLSC) is to reap the maximum economic benefit from end-of-use products. Nevertheless, literature within this stream of research advocates that closing the loop helps to mitigate the undesirable footprint of supply chains. In this paper we assess the magnitude of such environmental gains for Electric and Electronic Equipments (EEE), based on a single environmental metric of Cumulative Energy Demand. We detail our analysis for the different phases of the CLSC, i.e. manufacturing, usage, transportation and end-of-life activities. According to our literature review, within the same group of EEE, results greatly vary. Furthermore, based on the environmental hot-spots, we propose extensions of the existing CLSC models to incorporate the CED.

Appropriate Similarity Measures for Author Cocitation Analysis

Abstract: textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.

The Role of National Culture in Advertising’s Sensitivity to Business Cycles: An Investigation Across All Continents

Abstract: textCutting advertising budgets has traditionally been a popular reaction by companies around the globe when faced with a slacking economy. Still, anecdotal evidence suggests the presence of considerable cross-country variability in the cyclical sensitivity of advertising expenditures. We conduct a systematic investigation into the cyclical sensitivity of advertising expenditures in 37 countries across all continents, covering up to 25 years and four key media: magazines, newspapers, radio and television. While our findings confirm that advertising moves in the same direction as the general economic activity, we also show that advertising is considerably more sensitive to business-cycle fluctuations than the economy as a whole, with an average co-movement elasticity of 1.4. Interestingly, advertising’s cyclical dependence is systematically related to the cultural context in which companies operate. Advertising behaves less cyclically in countries high on long-term orientation and power distance, while advertising is more cyclical in countries high on uncertainty avoidance. Further, advertising is more sensitive to the business cycle in countries characterized by significant stock-market pressure and few foreign-owned multinationals. These results have important strategic implications for both global advertisers and their ad agencies.

Regional Opportunities and Policy Initiatives for New Venture Creation

Abstract: textThis paper investigates the determinants of new venture creation across industries and locations for 103 Italian provinces between 1997 and 2003. We allow for differences in regional opportunities across industries and investigate the impact of a range of factors on entrepreneurship in different industries: manufacturing, retailing and wholesaling, hotels and restaurants. Our results show that wage costs deter entry in manufacturing and that regions with industrial districts are characterized by higher start-up rates. Firm entry in commercial sectors appears higher in large cities and areas with strong economic progress. For hotels and restaurants we find that tourism positively influences new firm formation. In terms of policy we do not find a significant effect of recently introduced regional laws promoting new firm formation.

Marketing Communication Drivers of Adoption Timing of a New E-Service among Existing Customers

Abstract: textThe study investigates the effects of direct and mass marketing communications on the adoption timing of a new e-service among existing customers. The mass marketing communications concern both specific new service advertising and brand advertising from both the focal supplier and competitors. Using a split-hazard approach, the authors account for the fact that a significant part of the customer base will never adopt the new e-service. The empirical results show that service advertising shortens the time to adoption, even when it is initiated by competitors.

Organization and Strategy of Farmer Specialized Cooperatives in China

Abstract: How are the new farmer specialized cooperatives in China organized? This question is addressed by presenting data at three levels. First, data are presented regarding the historical development of farmer cooperatives in China. Second, data are presented regarding the membership composition of a sample of 66 farmer cooperatives in the Zhejiang province. Third, data are presented regarding the various attributes (governance, quality control system, and strategy) of a watermelon cooperative in this province. Many cooperatives are being transformed in organizations with a market orientation. The data indicate that cooperatives exhibit substantial heterogeneity, in terms of farmers being member and skewness in the distribution of control rights. Human asset specificity in terms of establishing and maintaining relations and access to markets seems to be more important than physical asset specificity in accounting for governance structure choice in the current institutional setting.

Peer Influence in Network Markets: An Empirical Investigation

Abstract: textWe analyze the effect of peer influence on the diffusion of an innovative network good. We argue that the adopters of a network good have an incentive to convince others to purchase the same product because their utility depends on the number of other users. This peer-effect influences individuals’ adoption decisions alongside the more familiar installed-base-effect, based on the individual’s own insight that a larger number of installed units increases his/her benefit of adopting. We test empirically which effect dominates with Instant Messaging, an innovative network good. We arrive at surprising results with far-reaching implications for research and management. The diffusion of Instant Messaging was to a large extent driven by the peer-effect, but the installed-base-effect seemed to play no role. We perform our estimation with a discrete time hazard rate model that controls for unobserved heterogeneity.

Some Comments on the Question Whether Co-occurrence Data Should Be Normalized

Abstract: textIn a recent paper in the Journal of the American Society for Information Science and Technology, Leydesdorff and Vaughan assert that raw cocitation data should be analyzed directly, without first applying a normalization like the Pearson correlation. In this report, it is argued that there is nothing wrong with the widely adopted practice of normalizing cocitation data. One of the arguments put forward by Leydesdorff and Vaughan turns out to depend crucially on incorrect multidimensional scaling maps that are due to an error in the PROXSCAL program in SPSS.

Individual Tariffs for Mobile Communication Services

Abstract: textThis paper introduces a conceptual framework and a computational model for individual tariffs for mobile communication services. The purpose is to provide guidance for implementation by communication service suppliers or user groups alike. The paper first examines the sociological and economic incentives for personalized services and individual tariffs. Then it introduces a framework for individual tariffs which is centered on user and supplier behaviours. The user, instead of being fully rational, has "bounded rationality" and his behaviours are subject to economic constraints and influenced by social needs. The supplier can belong to different types of entities such as firms and communities; each has his own goals which lead to different behaviors. Individual tariffs are decided through interactions between the user and the supplier and can be analyzed in a structured way using game theory. A numerical case in mobile music training is developed to illustrate the concepts.

Human Knowledge Resources and Interorganizational Systems

Abstract: textThis paper analyses how human knowledge resources affect capabilities and subsequently attainment of operational and strategic benefits. We test a conceptual model using data from two qualitative case studies and a quantitative field study. The findings indicate that human knowledge positively influences IOS capabilities related to cross-organizational business processes and transfer of knowledge. The data show that strategic benefits are the consequence of knowledge transfer, when the transfer supports business processes resulting in operational benefits.

Investigating the Development of the Internal and External Service Tasks of Non-executive Directors: The Case of the Netherlands (1997-2005)

Abstract: textDuring the last decade, globalization and liberalization of financial markets, changing societal expectations and corporate governance scandals have increased the attention for the fiduciary duties of non-executive directors. In this context, recent corporate governance reform initiatives have emphasized the control task and independence of non-executive directors. However, little attention has been paid to their impact on the external and internal service tasks of non-executive directors. Therefore, this paper investigates how the service tasks of non-executive directors have evolved in the Netherlands. Data on corporate governance at the top-100 listed companies in the Netherlands between 1997 and 2005 show that the emphasis on non-executive directors’ external service task has shifted to their internal service task, i.e. from non-executive directors acting as boundary spanners to non-executive directors providing advice and counseling to executive directors. This shift in board responsibilities affects non-executive directors’ ability to generate network benefits through board relationships and has implications for non-executive directors’ functional requirements.

Mass Customization in Wireless Communication Services: Individual Service Bundles and Tariffs

Abstract: textThis paper presents results on mass customization of wireless communications services and tariffs. It advocates for a user-centric view of wireless service configuration and pricing as opposed to present-day service catalog options. The focus is on design methodology and tools for such individual services and tariffs, using altogether information compression, negotiation algorithms, and risk portfolio analysis. We first analyze the user and supplier needs and aspirations. We then introduce the systematic design-oriented approach which can be applied. The implications of this approach for users and suppliers are discussed based on an end-user survey and on model-based calculations. It is shown that users can achieve desired service bundle cost reduction, while suppliers can improve significantly their risk-profit equilibrium points, reduce churn and simplify provisioning.

Strategic Debt: Evidence from Bertrand and Cournot Competition

Abstract: textWe investigate how competitive behavior affects the capital structure of a firm. Theory predicts that the impact of different types of output market uncertainty (in particular, unanticipated shocks in demand and costs) on a firm’s leverage depends on the type of competition in an industry. We test these predictions in a sample of U.S. manufacturing firms by classifying firms into Cournot competition (strategic substitutes), and Bertrand competition (strategic complements). We show that demand uncertainty is positively related to leverage for firms in both the Cournot and the Bertrand sample. Cost uncertainty has a significantly positive impact on the leverage of Cournot firms, but plays a negligible role for Bertrand firms. Our results support the strategic use of debt and highlight the role of firms’ competitive behavior in the product market in their capital structure decisions.

Extending the Managerial Power Theory of Executive Pay: A Cross National Test

Abstract: Contextual factors are typically neglected in both theorizing and empirical tests on executive pay. The fast majority of empirical investigations use data from U.S. based firms. Theoretical implications are typically developed, understood and tested on the basis of the U.S. context. However, the U.S. case is not the world wide standard. Pay in other countries is on average considerably lower and have a different pay mix. The puzzle that from the typical use of agency theory can’t be explained is the variance of pay practices that exist not only within countries but also across countries. This paper extends scholars renewed attention to managerial power theory on executive pay. It sets out how and why institutional theory must be included in explanations of executive pay. On the basis of a sample of executive pay packages from 17 different countries we test the theoretical extensions. Results indicate that institutions interact with firm level determinants of executive pay. Explanations for executive pay should therefore account for the variance of pay practices within and across countries. Highlighting that the institutional embeddedness of pay practices play an important role in finding conclusive explanations of current pay practices.

Business Strategies for Transitions towards Sustainable Systems

Abstract: textThis paper develops a strategic perspective for business to address persistent sustainability issues by contributing to the innovation of societal systems. Sustainability issues at the level of societal sectors or domains cannot be addressed by single organizations but require co-evolutionary changes in technology, economy, culture and organizational forms. We present the case of transition management in the Netherlands – an approach combining systems analysis with new modes of governance to influence the direction and speed of structural changes towards sustainability – and the activities of two firms working in this new context. From the two specific cases we conceptualize business strategies at different levels to advance sustainable development.

Postcards from the Edge: A Review of the Business and Environment Literature

Abstract: textEnvironmental issues, while of growing interest, have been outside the main focus of business scholarship. This position on the periphery may have been a good thing. It allowed scholars of business and the environment to consider unusual theories and evaluate overlooked phenomenon. In doing so, they created a body of research that provides new insights on two topics of mainstream interest -- the sources of competitive advantage and the origin and function of self-regulatory institutions.

Application of a General Risk Management Model to Portfolio Optimization Problems with Elliptical Distributed Returns for Risk Neutral and Risk Averse Decision Makers

Abstract: In this paper portfolio problems with linear loss functions and multivariate elliptical distributed returns are studied. We consider two risk measures, Value-at-Risk and Conditional-Value-at-Risk, and two types of decision makers, risk neutral and risk averse. For Value-at-Risk, we show that the optimal solution does not change with the type of decision maker. However, this observation is not true for Conditional-Value-at-Risk. We then show for Conditional-Value-at-Risk that the objective function can be approximated by Monte Carlo simulation using only a univariate distribution. To solve the equivalent Markowitz model, we modify and implement a finite step algorithm. Finally, a numerical study is conducted.

Emergency Messaging to General Public via Public Wireless Networks

Abstract: textWarnings to the broad population in an emergency situation, irrespective of location and condition, is a public policy responsibility. Public wireless networks offer now the opportunity to deliver emergency warnings in this way with explanations, because in many countries the mobile penetration rates are higher than any other access form .The paper summarizes the analysis of the selection process between Short messaging services (SMS) and Cell Broadcast messaging in the context of Denmark based on end user requirements and stakeholder roles. It demonstrates the many technical, cost-benefit and other trade-offs needed in supporting the population now with a dependable and wide-spread technology.

Clustering in ICT: From Route 128 to Silicon Valley, from DEC to Google, from Hardware to Content

Abstract: textOne of the pioneers in academic entrepreneurship and high-tech clustering is MIT and the Route 128/Boston region. Silicon Valley centered around Stanford University was originally a fast follower and only later emerged as a scientific and industrial hotspot. Several technology and innovation waves, have shaped Silicon Valley over all the years. The initial regional success of Silicon Valley started with electro-technical instruments and defense applications in the 1940s and 1950s (represented by companies as Litton Engineering and Hewlett & Packard). In the 1960s and 1970s, the region became a national and international leader in the design and production of integrated circuit and computer chips, and as such became identified as Silicon Valley (e.g. Fairchild Semiconductor, and Intel). In the 1970s and 1980s, Silicon Valley capitalised further on the development, manufacturing and sales of the personal computer and workstations (e.g. Apple, Silicon Graphics and SUN), followed by the proliferation of telecommunications and Internet technologies in the 1990s (e.g. Cisco, 3Com) and Internet-based applications and info-mediation services (e.g. Yahoo, Google) in the late 1990s and early 2000s. When the external and/or internal conditions of its key industries change, Silicon Valley seemed to have an innate capability to restructure itself by a rapid and frequent reshuffling of people, competencies, resources and firms. To characterise the demise of one firm leading, directly or indirectly, to the formation of another and the reconfiguration of business models and product offerings by the larger companies in emerging industries, Bahrami & Evans (2000) introduced the term `flexible recycling.’ This dynamic process of learning by doing, failing and recombining (i.e. allowing new firms to rise from the ashes of failed enterprises) is one of the key factors underlying the dominance of Silicon Valley in the new economy.

Export Orientation among New Ventures and Economic Growth

Abstract: textWhile it is generally acknowledged that entrepreneurship as well as export activity may both be important strategies for achieving national economic growth, it has remained unclear how export activity among new ventures is related to economic growth. This paper investigates whether the presence of export-oriented entrepreneurs is a more important determinant of economic growth than entrepreneurial activity in general. We focus on the national or macro-level and use data from the Global Entrepreneurship Monitor for a sample of 36 countries. An important advantage of using the macro-level is that indirect effects of exporting entrepreneurs that reach further than the performance of these firms themselves (e.g. spillovers) are captured in the analysis. To our knowledge, no attempt has been made thus far to link international activity of early-stage ventures to macro-economic out-comes. Our results suggest that export-oriented entrepreneurship is indeed more important for achieving high economic growth rates than entrepreneurial activity in general. This suggests that international activity by small and new firms strongly contributes to higher levels of competition and, consequently, to the emergence of highly dynamic economies and higher levels of economic growth.

A Recommitment Strategy for Long Term Private Equity Fund Investors

Abstract: textThis paper develops a reinvestment strategy for private equity which aims to keep its portfolio weight equal to a desired strategic allocation, while taking into account the illiquid nature of private equity. Historical simulations (1980-2005) show that our dynamic strategy is capable of maintaining a stable investment level that is close to the target. This does not only hold for unrestricted portfolios, but also for investments limited to buyout or venture capital, a specific region, or management experience. This finding is of great importance for investors, because private equity funds have a finite lifetime and uncertain cash flows.

India: a Case of Fragile Wireless Service and Technology Adoption?

Abstract: textWireless penetration and the Indian economy have grown significantly over the past few years, but how robust and sustainable is the adoption of wireless services and products? Several papers have discussed India as a wireless service and product market, and sometimes tried to assess quantitative attributes thereof. The present paper aims instead at looking, from a management point of view, at the unique underlying evolution processes, bottlenecks and risks. On specific facets, a comparison is given to adoption indicators in other key markets such as China. For example, just to illustrate highlights of these unique attributes , it is indeed surprising that such a major economy with its very large population has not yet achieved the wireless service usage and mobile terminal penetration ratios of neither an early European adopter ,nor of a recent large scale adopter like China or Russia . India has also been characterised by a surprising regulatory development process quite different from many other contexts, both in terms of its both centralised and regional structure, of very low tariffs providing almost no ROI to investors in a stable situation, and of absence of neutrality across communications technologies. At the same time, a very large fraction of the population has not , for affordability and regional coverage reasons, been able to get the access opportunities of more developed regions , leading to a distribution unbalance which is also a significant opportunity .Also , the wireless service and product adoption pattern in India , specific to communicating services , has so far been in rather sharp contrast with the widely known software and outsourcing services industry evolutions in that country . Therefore it is important to compare the most relevant known wireless service and product adoption theories, to establish from facts whether they apply in the Indian context, and, if not, suggest new or mixed theories able to explain all such facts and cast some light into its likely future structural evolution. It is of high relevance in management to validate if indeed established models apply or not in a significant case like India, just as it is also of high relevance for the main stakeholders to identify methodology able to support their analyses. The paper first provides background information on wireless, fixed, and other operators, on wireless penetration, on telecommunications infrastructure and investments, and on Indian human capital. Thereafter is analyzed in detail the relevance, or not, of five traditional technology adoption models across the Indian user base: the absorption business model, the perceived benefits business model, consumer attitudes, the globalisation business model, and finally the brand management business model. These first analyses are followed by the identification and detailed analysis of five other business models or structural processes, some rather unique to India: the two-tier migration model, large scale imported adoption without a telecommunications infrastructure & terminals industry, unstable adoption with lack of consistent public policies, knowledge sharing and productivity enhancement adoption model, and finally late foreign capital investments into a large emerging market. From the comparison of facts and background data , with these ten wireless service and product adoption models , the paper establishes which are not relevant, and which are too some degree . Furthermore the relevant business models are shown to share, further attributes of sustainability (or not) and dynamic behaviour. This allows concluding that India has had an overall quite fragile adoption and deployment path with growing tensions such as coverage, quality of service and affordability disparities. The model comparison also allows to diagnose the key three structural measures needed to reach a sustainable equilibrium from the business, economic and social points of view.

Extended Producer Responsibility in the Aviation Sector

Abstract: textIn this paper we investigate recent initiatives with respect to extended producer responsibility in the aviation sector. We compare those with the existing practices in the automobile sector and the emerging regulations in the shipping sector. We describe the challenges and the lessons to be learned from the evolution and state of extended producer responsibility in these two industries.

Performance Approximation and Design of Pick-and-Pass Order Picking Systems

Abstract: textIn this paper, we discuss an approximation method based on G/G/m queuing network modeling using Whitt’s (1983) queuing network analyzer to analyze pick-and-pass order picking systems. The objective of this approximation method is to provide an instrument for obtaining rapid performance estimates (such as order lead time and station utilization) of the order picking system. The pick-and-pass system is decomposed into conveyor pieces and pick stations. Conveyor pieces have a constant processing time, whereas the service times at a pick station depend on the number of order lines in the order to be picked at the station, the storage policy at the station, and the working methods. Our approximation method appears to be sufficiently accurate for practical purposes. It can be used to rapidly evaluate the effects of the storage methods in pick stations, the number of order pickers at stations, the size of pick stations, the arrival process of customer orders, and the impact of batching and splitting orders on system performance.