Neighborhood structure and the evolution of cooperation

This paper deals with the problem of explaining the survival of cooperative behavior in populations in which each person interacts only with a small set of social ‘neighbors’, and individuals adjust their behavior over time by myopically imitating more successful strategies within their own neighborhood. We identify two parameters—the interaction radius and the benefit–cost ratio—which jointly determine whether or not cooperation can survive. For each value of the interaction radius, there exists a critical value of the benefit–cost ratio which serves as the threshold below which cooperation cannot be sustained. This threshold itself declines as the interaction radius rises, so there is a precise sense in which dense networks are more conducive to the evolution of cooperation.     

Education Dashboards for Enhanced Learning: A Singapore Experience

Educators continue to utilize add-ons, extensions, or replacements to traditional Learning Management Systems (LMSs) to supplement capabilities and improve the classroom experience. This work resulted in the design and development of the Education Dashboards for Enhanced Learning (EDEL) template. The EDEL template enables faculty members to create dynamic web spaces called Knowledge Portals (KPortals). A semester-long introduction of KPortals proved to be positive and useful. Students tended to view the KPortal as a “go-to” webspace. The authors hope to refine the template in future studies and examine its usefulness in other countries.     

Globalization and the Good Corporation: A Need for Proactive Co-existence

Large corporations are coming under intense pressure to act in a socially responsible manner. Corporations have accepted this notion provided that it is exercised voluntarily. It has also been argued that corporations can do well by doing good, and that good ethics is good business. This paper presents an alternative viewpoint by demonstrating that while voluntary socially responsible conduct is desirable, it plays a rather small role in inspiring good corporate conduct. Instead, (a) it is the external economic-competitive conditions that define the parameters and opportunities for good corporate conduct; and (b) the values and traditions of the corporations, and their perceived risk in exploiting those opportunities, that influence the extent of a corporation's socially responsible conduct. The framework presented here analyzes certain market-competitive conditions, which determine the scope and direction of socially responsible corporate conduct, and the instruments available to society to enhance ethical corporate conduct. It suggests that from society's perspective, we should move away from the notion of corporate social responsibility and toward corporate social accountability. Most modern economies operate under conditions of imperfect competition where corporations gain above-normal profits, i.e., market rent, from market imperfections. Therefore, corporations should be held accountable for a more equitable distribution of these above-normal profits with other groups, e.g., customers, employees, etc., who were deprived of their market-based gains because of market imperfections and corporate power. Three approaches are suggested for measuring corporate accountability through corrections. These are: information imbalance, bargaining power imbalance, and, adjudication, remedy and relief imbalance.     

Freeport-McMoRan Copper &; Gold,Inc.: An Innovative Voluntary Code of Conduct to Protect Human Rights,Create Employment Opportunities,and Economic Development of the Indigenous People

Environmental degradation and extractive industry are inextricably linked, and the industry’s adverse impact on air, water, and ground resources has been exacerbated with increased demand for raw materials and their location in some of the more environmentally fragile areas of the world. Historically, companies have managed to control calls for regulation and improved, i.e., more expensive, mining technologies by (a) their importance in economic growth and job creation or (b) through adroit use of their economic power and bargaining leverage against weak national governments, regional and international regulatory bodies. More recently, the industry has had to contend with another set of challenges that involved treatment of indigenous people and their traditional land rights, fair treatment of workers, human rights abuses, and bribery and corruption involving local officials and political leaders. These challenges currently fall outside the traditional areas of regulation and control. Nevertheless, they pose serious threat to the industry’s business practices because of their global scope, threat to company’s reputation, and long-term risks of political instability leading to increasing cost of capital. Industry has responded to these challenges by creating voluntary codes of conduct that would signify their intent to comply with higher standards of conduct, and assuage public opinion that no further action is called for. These codes, however, lack any monitoring mechanism and reporting integrity to assure the public that the industry members are indeed meeting their commitments. Consequently, pressure on the industry continues unabated and with ever increasing calls for mandatory regulation and oversight. This article examines the activities of one mining company, Freeport-McMoRan Copper & Gold, Inc., which has taken a radically different approach in responding to these challenges at its mining operations in West Papua, Indonesia. While cooperating with industry-based efforts of voluntary codes of conduct, Freeport also initiated a radically different response through its own voluntary code that would directly focus on issues of human rights, treatment of indigenous people on whose traditional land its mine was located; economic development and job creation and, improvements in health, education, and housing facilities, to name a few. Additionally, the company earmarked large sums of money and involved representatives of the indigenous people in their management and disbursement. The company took an even more radical action when it committed itself to independent external audits of the company’s compliance with the code, and that these findings and company’s responses would be made public without prior censorship by the company. We analyze the nature of corporate culture, vision and risk-taking propensities of its management that would impel the company to embark on a high risk strategy whose outcomes could not be predicted with any degree of certainty before the fact. The parent company also had to confront discontent among the management ranks at the mine site because of cultural differences and management styles of expatriates and local (Indonesian) managers. Finally, we discuss in some detail the extensive and intensive character of a two phase audit conducted by the outside monitors, their findings, and the process by which they were implemented and reported to general public. We also evaluate the strengths and challenges posed by such audits, their importance to the company’s future, and how such projects might be undertaken by other companies.     

金蒲茵利胆合剂质量标准研究

采用薄层色谱法对金蒲利胆合剂处方中的大黄、厚朴进行了鉴别,用高效液相法对其中的金银花、茵陈进行含量测定。发现薄层色谱清晰,无干扰,重现性良好;绿原酸在0.0156~0.390μg范围内峰面积与进样量呈良好的线性关系,回收率达到96.88%,RSD=0.86%。说明该方法专属性强、重现性好、准确度高,可作为金蒲茵利胆合剂质量控制指标。     

Strategy and the research process: A comment

The purpose of this paper is to expand the discussion of the ‘state-of-the-science’ in strategy research. We critically examine the role that theory plays in strategic research, and describe the principles underlying good theory. From a philosophy of science perspective, we argue that: (1) both inductive and deductive methods are valid ways of generating theory; (2) the falsificationist perspective provides an inadequate model for describing the process of theory testing; and (3) managers, researchers, public policy-makers, the popular press, and the public at large all have important roles to play in the knowledge development process.     

A Stochastic Extension of the Miller-Modigliani Framework1

This paper deals with the problem of the financial valuation of a firm and its shares of stock with general financing policies in a partial equilibrium framework. the model assumes a time-dependent discount rate and a general stochastic environment in a discrete-time setting. the fundamental valuation approach under the assumption of risk neutrality is used to obtain the time path of share price, the number of outstanding shares, and the value of the firm. These are shown to be the unique conditional expectations of certain stochastic processes. A broad class of firms for which the solution formula yields finite-valued solutions is characterized. the results are extended to the non-risk-neutral case. A regularity condition, which is both necessary and sufficient for the share price to equal the capitalization of future dividends accruing to the share, is obtained. As a mathematical aside, it is shown in the appendix that in the absence of this condition, the so-called stream of dividends approach is meaningless in the sense that it does not yield any financial valuation.     

Value creation and destruction in cross‐border acquisitions: an empirical analysis of foreign acquisitions of U.S. firms

We conduct an investigation of the sources of gains and losses in cross‐border acquisitions in light of different motives for undertaking these transactions: synergy‐seeking, managerialism and hubris. We find that the data are consistent with the expectation that multiple sources of value creation exist in synergistic cross‐border acquisitions: asset sharing, reverse internalization of valuable intangible assets, and financial diversification. Gains accrue to bidder firm shareholders only for the least fungible of these sources of gains, i.e., reverse internalization. For value‐destroying acquisitions that are expected to be driven by managerialism, we find that the data are consistent with only one of the sources of value destruction that we examine, i.e., risk reduction. In these acquisitions, the evidence also suggests that the relative size of the target to the bidder mitigates the negative effects of risk reduction. Our results underscore the importance of considering the implications of alternative behavioral assumptions in empirical strategy content research. Copyright © 2002 John Wiley & Sons, Ltd.     

Efficiency and stability of sampling equilibrium in public goods games

Most models of social preferences and bounded rationality that are effective in explaining efficiency‐increasing departures from equilibrium behavior cannot easily account for similar deviations when they are efficiency‐reducing. We show that the notion of sampling equilibrium, subject to a suitable stability refinement, can account for behavior in both efficiency‐enhancing and efficiency‐reducing conditions. In particular, in public goods games with dominant strategy equilibria, stable sampling equilibrium can involve the play of dominated strategies with positive probability both when such behavior increases aggregate payoffs (relative to the standard prediction) and when it reduces aggregate payoffs. The dominant strategy equilibrium prediction changes abruptly from zero contribution to full contribution as a parameter crosses a threshold, whereas the stable sampling equilibrium remains fully mixed throughout. This is consistent with the available experimental evidence.