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Surrogate motherhood is a controversial subject, and has not previously been formally modelled by economists. In this paper, a neoclassical model of the market for surrogate motherhood contracts is developed, based on the utility maximizing decisions of potential surrogate mothers and commissioning parties. The presence of both altruistic and self-interested behaviour generates unusual market outcomes.  相似文献   
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Determinants of internal and external R&D: Some Dutch evidence   总被引:1,自引:0,他引:1  
Summary Innovating firms can choose to engage in either internal or external R&D, or in both. In the current study, we shall examine internal and external R&D separately to determine empirically the market structure characteristics explaining the external R&D share and the differences in market structure determinants between internal and external R&D. Our results indicate that a government policy that aims at stimulating technological progress by offering external research facilities is particularly interesting for smaller, capital-intensive firms operating in less concentrated markets.We would like to thank Alfred Kleinknecht for providing the R&D data and Kees Bakker and Yvonne Prince for providing the market structure data. We thank Alfred Kleinknecht, Bart Nooteboom and an anonymous referee for their comments and suggestions We acknowledge a research grant from the Stichting KMO Fonds.  相似文献   
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Browning G 《National journal》1993,25(34-35):2083-2086
Critics within and outside the National Institutes of Health say that NIH's central administration is hostile and defensive and needs to be shaken up. They hope a new director will do just that.  相似文献   
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Conclusions Unlike McKenzie and Tullock, we do not know how personsshould treat their bodily organs or what is an ideal exit. That depends upon their utility goals, which are defined in output terms specific to the decision maker. We contend that the body is an input into the utility production process, and therefore, as with any input, it must be maintained and repaired at a level consistent with the output goals for maximization of utility. Thus, from this framework, it is quite consistent for a person to die with healthy organs without any thought of belief in reincarnation or the desire to bequeath one's bodily organs to others, or religious values. Self interest is all that must prevail.Also, the fact that there are interrelationships between the organs in the system, and at points these relationships take on fixed factor characteristics such that reduced levels of operation in one organ can create disorientation or coma or damage to other organs, means that the body cannot die as M-T suggest. Zero capacity for all organs at death is a technical impossibility as well as being inconsistent with the output goals of utility maximizers.  相似文献   
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One of the most effective tools of promotion in industrial markets, though often misused and little understood, is the proper use of direct mail. This article focuses upon the major considerations, with numerous examples, for planning and executing different direct mail programs.  相似文献   
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