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151.
A recent study of R&D alliances between new biotechnology firms (NBFs) and pharmaceutical firms investigated how NBFs deal with the “swimming with sharks” dilemma involved in allying with firms capable of appropriating value. It concludes that NBFs are less likely to select alliance partners with related expertise because of greater appropriation risk. Based on our experience as NBF managers and a survey of NBF executives, we believe that such situations are uncommon, and that the study more likely shows pharmaceutical firms seeking diversification. Thousands of NBFs seek alliances with the top 100 pharmaceutical firms, and the larger company is much more likely to be the one to select among multiple potential partners. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   
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While it is troubling when power-index values change with the index, the problem is more severe: Different indices can generate radically different rankings. For example, a 15-player game exists with over a trillion different strict index rankings of the players. In contrast, with a fixed number of players certain indices always share the same ranking: e.g., the Shapley and Banzhaf rankings agree with three players, but they can have opposite rankings with more players. It is explained why index outcomes can be sensitive to assumptions and to when players leave a game. Journal of Economic Literature Classification Numbers: C71, D71.  相似文献   
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While substantial effort has been undertaken to understand the consequences of industrial and agricultural uses for the environment, concern has also been expressed about its other uses, including recreation. Little is known about the relationship between recreational behavior and an environmental resource base. The present paper focuses upon participation in a specific outdoor recreation activity or activity‐cluster and dominant resource base where participation occurs. Resource bases identified were river, lake, ocean, swamp/marsh, forest/mountain, range/ farm and city/town. Emphasis is placed upon aquatic environs and participation in water‐based recreation. Water activities constituted from 14–30 percent of all outdoor activities taking place at those resource bases identified. Aquatic environments provided the resource base for 38 percent of all recreation participation events, water‐ and non‐water based, occurring during one reporting period. While participation in water‐based activities requires a water resource, the array of participation patterns reported suggests that resource bases defined as recreation places provide a wide range of opportunities for non‐resource‐dependent recreation activities. One conclusion is that resource bases cannot be distinguished by the recreation activities occurring on them. Resource bases in fact facilitate a wide range of recreation activities, some holding little direct connection with the resource base, nor are the conditions of the resource sufficient to predict behavioral outcomes.  相似文献   
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This paper, presented as an addresss to the Annual Conference of the European Society for the History of Economic Thought, argues that writing history may be more interesting if progress is not made the leitmotif. Starting from an examination of early causal accounts of the history of political economy, written in the ninteenth century by Marx, Toynbee, Ingram and Leslie, a plea is made for narratives rather than explanations. Consistent with the former historians of economic thought this may be perceived as eavesdropping on conversations of the past. To understand the richness of these conversations they need to perceive their work not just as a sub-discipline of economics but in a wider interdisciplinary setting.  相似文献   
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Significant, favorable attitudinal response toward both the brand and ad were observed at the first exposure in a laboratory experiment on the effects of repeated exposure to television advertisements. At higher levels of repetition, lower, although still positive, ratings were obtained. Response was significantly mediated by prior brand attitude. Mean differences in attitude toward the brand and ad were only partially accounted for by changes in brand perception.  相似文献   
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