The measurement of corporate portfolio strategy: analysis of the content validity of related diversification indexes

Measures developed for the analysis of corporate diversification have become fundamental to a broad range of strategy research. This paper examines the content validity of the two most widely used continuous measures of related diversification—the related component of the entropy index and the concentric index—and raises fundamental questions about their validity as indicators of portfolio relatedness. These questions are not driven by the use of SIC data for estimation of the indexes; they involve validity problems intrinsic to the construction of the measures. The related component of entropy and the concentric index are sensitive to features of corporate portfolio composition that may not be directly linked to portfolio relatedness. These sensitivities can create important ambiguities in strategy research. Copyright © 2002 John Wiley & Sons, Ltd.     

The impact of earnings expectations on corporate downsizing

Research Summary: We propose that due to financial market pressures, managers are forward‐looking in their search and decision processes and focus on meeting performance targets set by the financial community. Using panel data on S&P 100 companies, we find that pressure felt by management to meet the analyst consensus earnings estimate influences the extent of corporate downsizing. Moreover, our results show that high levels of institutional investor stock ownership and CEO power attenuate managers’ sensitivity to financial market pressures, while high levels of analyst coverage increase their sensitivity. Managerial Summary: In this study we examine how financial market pressures influence managers’ downsizing decisions. We argue that investment analysts’ earnings estimates represent important performance targets to which managers aspire. If firms fail to meet analysts’ expectations, the stock price will suffer. This study shows that managers utilize corporate downsizing to address the potential shortfall between a firm's future performance and the analyst consensus earnings estimate. In addition, we find that managers’ concerns over meeting analysts’ earnings estimates are influenced by various contextual factors such as institutional investor stock ownership, CEO power, and high levels of analyst coverage.     

Top management team turnover as an adaptation mechanism: The role of the environment

Based on an organizational adaptation framework, this study examines the influence of three environmental dimensions–munificence, stability, and complexity–on top management team turnover. In addition to investigating the direct influence of these environmental dimensions, indirect effects through firm performance and strategic change are also examined; the indirect effect of environmental complexity through demographic heterogeneity is also studied. Path analysis indicates that the direct effects of the three environmental dimensions predominate. Indirect effects were nonsignificant except for the effect of instability and munificence through strategic change. By expanding the team turnover context to include environmental and strategic dimensions, in addition to previously examined performance and heterogeneity factors, this study enhances our understanding of managerial turnover as a form of organizational adaptation.     

Foreign‐based competition and corporate diversification strategy

Since the mid‐1980s U.S. domestic firms have faced significant increases in foreign‐based (i.e., import) competition as reductions in barriers to international commerce have resulted in markets and industries becoming increasingly global. Despite the growing and widespread importance of foreign‐based competition, the influence that such competition may exert on corporate diversification strategy is a question largely overlooked in the strategic management literature. This paper examines the impact of foreign‐based competition in a firm's core business on both the level and nature of a firm's diversification strategy at the corporate level in a panel dataset of U.S. firms over the period 1985–94. Our findings provide the first evidence that increased foreign‐based competition is indeed a statistically significant factor explaining both the reduced business‐level diversity and the increased strategic focus of U.S. firms that has been widely perceived over the past two decades. Copyright © 2005 John Wiley & Sons, Ltd.     

Regulatory Risk and Market Reactions — Empirical Evidence from Germany

In this article we measure the effects of events on risk and return and analyze the persistence of the influencing variables on German energy companies. Therefore, we refer to event-study methods by means of the Capital Asset Pricing Model, GARCH-Modeling and Kalman filters. We find that the discussed events do not affect all companies in an equal manner. Moreover, we show that the impact on risk and returns is not persistent and does not lead to an increase in the overall systematic risk for the considered utility operators in Germany.     

The convenience yield implied in European natural gas hub trading

In this study, we investigate the estimates of the convenience yield implied in European natural gas hub trading. In addition to the net convenience yield, we provide two option/based approaches, which connect to the economic idea of the convenience yield as being the benefits from holding the physical commodity. In particular, we approximate the convenience yield via lookback and Asian options. Our empirical results are consistent with the intuition conveyed by the theory of storage. We conclude that the choice of an adequate approximation method should depend on the market under investigation, in particular, on the existence of market frictions such as short/sale constraints or restricted storage access. © 2011 Wiley Periodicals, Inc. Jrl Fut Mark     

Corporate diversification: the impact of foreign competition,industry globalization,and product diversification

The globalization of markets and industries has fundamentally changed the competitive conditions facing firms. Yet, how globalization has influenced the international diversification strategies of firms is an issue largely overlooked in both the strategic management and international business literatures. This paper develops a theoretical framework to understand how industry globalization, foreign competition, and firm product diversification may influence a firm's choice of its degree and scope of international diversification. Utilizing a panel dataset of U.S. manufacturing firms for the period 1987–99, we provide the first empirical evidence that industry globalization and foreign-based competition are statistically significant factors explaining the degree and scope of international diversification by U.S. firms. Copyright © 2007 John Wiley & Sons, Ltd.     

Matching method to paradigm in strategy research: limitations of cross‐sectional analysis and some methodological alternatives

A central focus of empirical research in strategic management has been to understand the relationships associated with the structure–strategy–performance paradigm. To examine these relationships, investigators have relied extensively on cross‐sectional methods that embody the implicit assumption that model parameters are stable across firms and over time. Yet, many of the theoretical constructs used in strategic management have clear firm‐ and time‐specific components. Hence, it might be expected that the parameters of the relationships investigated empirically will vary across firms and over time. Whereas recent research has raised concerns about the use of cross‐sectional analysis when parameters vary over time, little attention has been given to the issue of parameter variability across firms. Given the focus of strategy researchers on firm‐level effects and the predominant reliance on cross‐sectional analysis, accounting for across‐firm variability is a significant methodological issue. Failure to account for such variability can lead to biased parameter estimates and incorrect inferences. This paper argues for the adoption of alternative methods that can overcome the limitations of a cross‐sectional analysis and it offers guidance on how researchers can proceed to use these alternative methods to explicitly incorporate or test for variation in model parameters across firms or over time. Copyright © 1999 John Wiley & Sons, Ltd.