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61.
We analyze a dynamic and stochastic ecological-economic model of grazing management in semi-arid rangelands. The ecosystem is driven by stochastic precipitation. A risk averse farmer chooses a grazing management strategy under uncertainty such as to maximize expected utility from farming income. Grazing management strategies are rules about which share of the rangeland is given rest depending on the actual rainfall in that year. In a first step we determine a myopic farmer's optimal grazing management strategy and show that a risk averse farmer chooses a strategy such as to obtain insurance from the ecosystem: the optimal strategy reduces income variability, but yields less mean income than possible. In a second step we analyze the long-run ecological and economic impact of different strategies. We conclude that a myopic farmer, if he is sufficiently risk averse, will choose a sustainable grazing management strategy, even if he does not take into account long-term ecological and economic benefits of conservative strategies. 相似文献
62.
This paper explores the implications of social security programs and annuity markets through which agents, who are characterized by different distributions of length of lifetime, share death-related risks. When annuity markets operate, a non-discriminatory social security program affects only the intragenerational allocation of resources. In the absence of private information regarding individual survival probabilities, such a program will lead to a non-optimal intragenerational allocation of resources. However, the presence of adverse selection considerations gives rise to a Pareto improving role for a mandatory non-discriminatory social security program. 相似文献
63.
This work relates to Department of the Navy Contract N00014-86-K0220 issued by the Office of Naval Research under Contract Authority NR 047-006. However, the content does not necessarily reflect the position or the policy of the Department of the Navy or the Government, and no official endorsement should be inferred. Revised with support of NSF contract SES-8812051.The United States Government has at least a royalty-free, non-exclusive and irrevocable license throughout the world for Government purposes to publish, translate, reproduce, deliver, perform, dispose of, and to authorize others so to do, all or any portion of this work. 相似文献
64.
Martin Feldstein 《De Economist》1993,141(1):29-42
Summary The very slow growth of the broad money supply has been a primary source of U.S. economic weakness in 1990 through 1992. The velocity link between M2 and the subsequent level of nominal GDP has not declined. But changes in bank reserves brought about by open market operations have had much less effect onM2 than the Fed anticipated for two reasons: (1) reserve requirements now apply to only a small fraction of totalM2; and (2) the new bank capital requirements limit some banks ability to lend. The Federal Reserve failed to appreciate the importance of these conditions and misjudged the strength of the monetary policy stimulus that it was providing.Professor of Economics, Harvard University, and President of the National Bureau of Economic Research.Sixth Tinbergen Lecture delivered on October 2, 1992, in The Hague for the Royal Netherlands Economic Association. 相似文献
65.
The two main purposes of this paper are an introduction to the economic analysis of insurance fraud and furthermore a derivation of factors that determine fraudulent behavior of policyholders on insurance markets. Consequently, we analyze the strategic decision problems of insurance companies and the policyholders and identify some factors that can help to reduce fraudulent behavior. In this context we evaluate two derived starting points for the combat against insurance fraud: fraud detection systems and a consequent charge policy of detected defrauders. We illustrate that both points can help to reduce the cost of fraud. Furthermore, we enhance our earlier analysis with respect to the empirical fact that some individuals care about fairness or — in the insurance fraud context — the legitimacy of their actions. Surprisingly, in some market situations these concerns of some policyholders do not lead to a lower fraud probability. Finally, we discuss how and to what extent insurance companies can influence such ethical concerns of policyholders. On that score, we distinguish insurance specific and insurance unspecific factors and their impact on the consumers attitudes towards insurance fraud. 相似文献
66.
John A. Doukas Martin Holmen & Nickolaos G. Travlos 《European Financial Management》2002,8(3):281-314
We study the short‐ and long‐term valuation effects of Swedish takeovers. Using a sample of 93 bidding firms that acquired 101 targets between 1980 and 1995, we find that diversifying acquisitions lead to a negative market reaction and deterioration of the operating performance of the bidder. Announcement and performance gains in each of the three years following the acquisition occur only when bidders expand their core rather than their peripheral lines of business. Our findings suggest that focused acquisitions lead to greater synergies and operating efficiencies than diversifying acquisitions. Intra‐group acquisitions, however, show that bidders do not realise significant gains whether they adopt diversifying or focusing investment strategies by purchasing firms controlled by the Wallenberg and SHB conglomerate groups. Intra‐group targets realize significant gains regardless bidder's investment strategy. Finally, the evidence does not support the view that intra‐conglomerate acquisitions are associated with expropriation of minority shareholders. However, they appear to enhance the control rights of large shareholders of the bidding firm. 相似文献
67.
Martin Glaum 《实用企业财务杂志》2002,14(4):108-121
Survey studies of both corporate exchange risk management and the corporate use of derivatives in general have shown considerable variation in managerial practices. Some firms do not hedge open positions at all, and some hedge their exposures completely. Most companies, however, hedge only those positions on which they expect a currency loss, while leaving open positions on which they expect a currency gain—a practice known as “selective hedging.” Finally, there is a small minority of firms that engage in outright speculation, deliberately creating risk exposures in addition to those arising from their normal business operations. Such findings are consistent with survey studies that suggest that a majority of corporate financial managers appear to believe that they are able to “beat the market”—a belief that, of course, is inconsistent with efficient markets theory. So why do some companies follow selective risk management strategies while other firms hedge open positions without recourse to exchange rate forecasts? In an attempt to answer this question, the author surveyed 74 German non‐financial companies about their exchange risk management practices. He found that highly levered firms were less likely to take bets in the currency markets, while bank‐controlled firms were more likely to use a selective risk management strategy. There was a negative relationship between profitability and the use of selective hedging—a finding that could be interpreted as suggesting that selective hedging does not generally benefit the firm's shareholders. Finally, there was a weak tendency for larger firms to be more inclined to use forecasts in their foreign exchange risk management. 相似文献
68.
Incentive Fees and Mutual Funds 总被引:10,自引:1,他引:10
This paper examines the effect of incentive fees on the behavior of mutual fund managers. Funds with incentive fees exhibit positive stock selection ability, but a beta less than one results in funds not earning positive fees. From an investor's perspective, positive alphas plus lower expense ratios make incentive-fee funds attractive. However, incentive-fee funds take on more risk than non-incentive-fee funds, and they increase risk after a period of poor performance. Incentive fees are useful marketing tools, since more new cash flows go into incentive-fee funds than into non-incentive-fee funds, ceteris paribus. 相似文献
69.
We investigate the use of unit (i.e., package) initial public offerings by Australian industrial firms and conclude that their use reflects their role as a signaling mechanism (Chemmanur and Fulghieri, 1997), as distinct from the agency–cost explanation offered by Schultz (1993). From a sample of 394 IPOs between 1976 and 1994, the 66 firms making unit offerings are typically riskier, use less prestigious underwriters and have a lower level of retained ownership than other IPO firms. While these results are also consistent with Schultz's agency cost explanation, other results we report are not. We find no difference in underpricing etween unit IPOs and other IPO firms, nor are there any significant differences in the planned uses of proceeds reported in the prospectus, post–listing failure rates or secondary equity offerings of the type predicted by Schultz. We do however, report evidence consistent with a prediction unique to the signaling explanation. After controlling for the level of ownership retained by insiders, the proportion of firm value sold as warrants is increasing in IPO firms' riskiness. 相似文献
70.
Hoesli Martin Giaccotto Carmelo Favarger Philippe 《The Journal of Real Estate Finance and Economics》1997,15(1):93-109
This paper develops constant-quality price indices for three categories of real estate-apartment buildings, vacant land, and condominiums—for the city of Geneva, Switzerland. We use both the hedonic and repeat sales models to estimate the price level and, in turn, the rate of price change. The general pattern of each series suggests that real estate prices in Geneva were fairly stable throughout the 1970s, increased sharply during the 1980s, but gave back some of these gains in the early 1990s. Interestingly, the sharp rise in prices in the second half of the 1980s is very similar to that found in some regions of the United States. We also consider the problem, implicit in the repeat sales method, of revisions in previously estimated price indices as additional data become available in later years. 相似文献