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1.
Zusammenfassung Es wird eine optimale Strategie im Sinne des minimalen erwarteten Verlustes für die beiden Entscheidungeny>y
o undyy
o aufgrund der Messungen einer mitY positiv korrelierten, einfacher und/oder billiger zugänglichen ZufallsvariablenX abgeleitet. Dabei wird angenommen, daßX undY nach einer bivariaten Normalverteilung mit bekannten Parametern verteilt sind und die Entscheidungyy
o getroffen wird, wennx größer ist als ein zu bestimmendesx
o, und die Entscheidungy>y
o, wennx gleich oder kleiner als diesesx
o ist. Für die Bestimmung des optimalenx
o werden zunächst die Kosten für die beiden Fehlentscheidungen jeweils als konstant vorausgesetzt, in einem weiteren Ansatz wird jedoch für die Mißklassifikationyy
o eine mity exponentiell wachsende Risikofunktion angenommen. Um die relative Häufigkeit der zu erwartenden Fehlklassifikationen abschätzen zu können, wird schließlich die bedingte WahrscheinlichkeitP(x>x
o,y) errechnet.
Summary An optimal strategy, with minimum expected risk, for the decisionsy>y o oryy o is constructed on the basis of the measurement of a variableX, which is positively correlated withY and can be measured more easily and/or with smaller expense. A bivariate normal distribution with known parameters is assumed forX andY. For the observationsx a limitx o is aimed at, so that the decisionsy>y o oryy o are taken ifx>x orxx o respectively. Optimal values ofx o are first calculated under the assumption of constant losses for the two misclassifications (x>x o ifyy o andxx o ify>y o). In a further approach the loss for a wrong decisionyy o is assumed to increase exponentially withy. Finally the conditional probabilityP (x>x o\y) is calculated to get an assessment of the relative frequencies of wrong decisions to be expected.相似文献
2.
As financial pressures on non-profits rise, fund raisers are constantly searching for alternative income sources. Life insurance may be one of them. 相似文献
3.
4.
5.
Jay Mitchell Eric A. DeVuyst Marc L. Bauer Daniel L. Larson 《Agricultural Economics》2009,40(1):113-118
Profitability of cow-calf production is determined largely by market prices, calf weaning weights, and cow productive life. While producers individually have no effect on prices, weaning weights and productive life have genetic influences and hence can be altered by selection programs implemented by producers. We investigate the impact of a mutation in the leptin gene (exon 2; single nucleotide polymorphism [SNP] 305) on cow-calf profitability. Prior research shows that this mutation has effects on performance and traits of fed cattle and milk production in dairy cows. Using data from a teaching-research herd, we find that it is also associated with calf weaning weights and cow productive life. A bio-economic stochastic simulation demonstrates that the mutation has statistically positive impacts on profits, suggesting that producers can profitably make use of this information. 相似文献
6.
Although the academic interest in ethical mutual fund performance has developed steadily, the evidence to date is mainly sample-specific.
To tackle this critique, new research should extend to unexplored countries. Using this as a motivation, we examine the performance
and risk sensitivities of Canadian ethical mutual funds vis-à-vis their conventional peers. In order to overcome the methodological
deficiencies most prior papers suffered from, we use performance measurement approaches in the spirit of Carhart (1997, Journal of Finance 52(1): 57–82) and Ferson and Schadt (1996, Journal of Finance 51(2): 425–461). In doing so, we investigate the aggregated performance and investment style of ethical and conventional mutual funds and allow for time variation in the funds’ systematic risk. Our␣Canadian
evidence supports the conjecture that any␣performance differential between ethical mutual funds and their conventional peers
is statistically insignificant.
相似文献
7.
Netzwerke und Kooperationen sind entscheidende Instrumente zur Steigerung des Unternehmenswertes. Bisher haben sich Ans?tze
hier auf die Unternehmensseite (Wertsch?pfungs-, Entwicklungsund Vertriebsnetzwerke) konzentriert. In jüngster Zeit rücken
auch Netzwerke auf Nachfragerseite etwa in Form von Kommunikations- und Empfehlungsnetzwerken zunehmend in den Blickpunkt.
Solche sozialen Netzwerke k?nnen gerade durch Marketingma?nahmen initiiert und gestaltet werden. Sie sind zentrale Stellhebel
zur Steigerung der Marketing Performance und somit zur Legitimierung der Marketingfunktion. 相似文献
8.
Ekkehardt Bauer 《International Journal of the Economics of Business》2007,14(3):433-457
We analyze the effect of state subsidies on early stage investments. In a two‐period investment model with incomplete stage financing contracts, we describe optimal and second‐best investment levels. Optimality depends on external effects: given that private early stage financing generates positive external effects, the subsidies might be designed to use scarce state money most efficiently to mobilize private investment capital. However, a subsidy might also contribute to greater efficiency of the contractual relationship itself without regard to external effects. Refinancing subsidies can be optimal under both perspectives and are always optimal under last of the two approaches. The comparison of the main types of subsidies, i.e. refinancing subsidies, guarantees and direct investments, speaks against the use of guarantees. Finally, we show that our results do also hold if some investors (e.g. venture capitalists) have a superior screening capability. 相似文献
9.
Other-regarding preferences are important for establishing and maintaining cooperative outcomes. In this paper, we study how the formation of other-regarding preferences during childhood is related to parental background. Our subjects, aged 4–12 years, are classified into other-regarding types based on simple binary-choice dictator games. The main finding is that the children of parents with low education are less altruistic, more selfish, and more likely to be weakly spiteful. This link is robust to controlling for a rich set of children’s characteristics and class fixed effects. It also stands out against the overall development of preferences, as we find children to become more altruistic, less selfish, and less likely to be weakly spiteful with increasing age. The results, supported by a complementary analysis of World Values Survey data, suggest an important role of socialization in the formation of other-regarding preferences. 相似文献
10.
In this paper, we develop a comprehensive model of M&A success. We integrate fundamental constructs of different schools and discuss their interdependencies with M&A success. Our theoretical framework was tested empirically across a sample of 106 SME transactions in the machinery, electronic, and logistic industries in the German‐speaking part of Central Europe. The results of our study support the demand for an integrative perspective and theory on M&A. M&A success is a function of strategic complementarity, cultural fit, and the degree of integration. Strategic complementarity also positively influences cultural fit and the degree of integration. Cultural fit positively influences M&A success, but surprisingly has a negative impact on the speed and degree of integration. The degree of integration is positively related to speed of integration. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献