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31.
The celebrated model of Gallego and van Ryzin is specialized to the case of constant elasticity of demand. A closed form is developed, which has an even simpler form than that arising with exponential demand and which possesses an excellent approximation. In this environment, monopoly is efficient, which means that all the behavior usually attributed to monopoly pricing is actually a consequence of efficient pricing and would arise even in a perfectly competitive environment. If the initial supply is not too large, consumers have no incentive to delay their purchases to get a lower price at the average inventory prevailing at any time. 相似文献
32.
Zinette Bergman Manfred Max Bergman Christoph Haenggi Zhao Lei Andrew Thatcher 《Mobilities》2020,15(4):465-479
ABSTRACT China’s mobility turn has created the world’s largest public rail system, contributing extensively to citizens’ economic, social, and spatial mobility. Concurrently, this technological transformation has introduced many opportunities for individuation, which could potentially challenge the social, collectivistic, and Confucian foundations of China’s sociocultural and political ideology. While the notion that ‘mobility produces culture’ is readily accepted, research on train mobility in China is rare. In this study, we use Albert Bandura’s Model of Triadic Reciprocal Causation to conceptualize mobility as agency. We employ Hermeneutic Content Analysis, a mixed methods framework, to study how this rapidly evolving mobility environment connects to the lives of 31 regular train users living in Beijing. Studying agency in China enables us to systematize the sociocultural models within which mobility practices are embedded and how they manifest. We find that our interviewees embed agentive practices in a cultural model that is intertwined with collectivistic aspirations of the country. Technological developments are thus integrated into existing sociocultural models and political expectations, contradicting existing debates on the fracturing impact of disruptive technologies. 相似文献
33.
34.
Jörg Flecker Sabine Kirschenhofer Manfred Krenn Ulrike Papouschek 《?sterreichische Zeitschrift für Soziologie》2005,30(3):3-27
The European research project SIREN analysed subjective perceptions and interpretations of changes in working life and their interrelation with political orientations. This article presents the results of the qualitative part of the research in Austria. The findings lead to a better understanding of the appeal to various population groups of rightwing populism and allow an empirical scrutiny of related theses. In particular, the contribution describes, by way of a typology, the variety of reasons as to why people take on authoritarian-exclusivist orientations and accept right-wing populist political propositions. The core question is how subjective perceptions and interpretations of socioeconomic change are transformed into political subjectivity. 相似文献
35.
本文是曼弗雷德·鲍姆(Manfred Baum)教授2008年10月3日在武汉大学哲学学院所作讲演的译稿.文中对康德<道德形而上学>一书划分成"法权论"和"德行论"的来由、理论根据和基础进行了分析,认为康德摧毁了传统的自然法学说,而把法权和德行全都建立在人的自由之上,视为人的义务的内外两方面.同样作为定言命令,康德的法权原则是分析命题,德行原则是综合命题,前者对人的目的不作要求,后者则要求人把人格和人性当作目的.但法权毕竟要以道德为前提和评价标准,而道德本身的评价标准则是从外部合法性向内部行动"转移"而来的,这是一个矛盾. 相似文献
36.
Note on the bias in the estimation of the serial correlation coefficient of AR(1) processes 总被引:1,自引:0,他引:1
Manfred Mudelsee 《Statistical Papers》2001,42(4):517-527
We derive approximating formulas for the mean and the variance of an autocorrelation estimator which are of practical use
over the entire range of the autocorrelation coefficient ρ. The least-squares estimator ∑
n
−1
i
=1ε
i
ε
i
+1 / ∑
n
−1
i
=1ε2
i
is studied for a stationary AR(1) process with known mean. We use the second order Taylor expansion of a ratio, and employ
the arithmetic-geometric series instead of replacing partial Cesàro sums. In case of the mean we derive Marriott and Pope's
(1954) formula, with (n− 1)−1 instead of (n)−1, and an additional term α (n− 1)−2. This new formula produces the expected decline to zero negative bias as ρ approaches unity. In case of the variance Bartlett's
(1946) formula results, with (n− 1)−1 instead of (n)−1. The theoretical expressions are corroborated with a simulation experiment. A comparison shows that our formula for the mean
is more accurate than the higher-order approximation of White (1961), for |ρ| > 0.88 and n≥ 20. In principal, the presented method can be used to derive approximating formulas for other estimators and processes.
Received: November 30, 1999; revised version: July 3, 2000 相似文献
37.
Manfred Füllsack 《?sterreichische Zeitschrift für Soziologie》2009,34(3):62-81
The paper in hand ventures to introduce a mathematical formalization of anticipation in social systems as suggested by Loet Leydesdorff on the background of the anticipatory-conception by Daniel Dubois and the Theory of Social Systems by Niklas Luhmann. The paper discusses a difference between Luhmann and Leydesdorff concerning their conceptions of information and hints at possibilities to overcome this difference by considering the medium-form-distinction as introduced by Luhmann. 相似文献
38.
39.
Manfred Bruhn 《Zeitschrift für Betriebswirtschaft》2008,78(7-8):833-836
40.
Theory and Decision - We study the effect of scarcity on decision making by low income Swedes. We exploit the random assignment of welfare payments to study their borrowing decisions within the... 相似文献