Global ETD Search

1	Kostenminimale Flüsse in endlichen und unendlichen Netzwerken / Morisse, Karsten. January 1996 (has links) Universiẗat-Gesamthochsch., Diss.--Paderborn, 1996.
2	Parametric and nonparametric measures of productive performance : the case of private manufacturing in Egypt / Getachew, Lullit. January 2002 (has links) (PDF) Tex., Rice Univ., Diss.--Houston, 2003. / Kopie, ersch. im Verl. UMI, Ann Arbor, Mich.
3	Die steuerlichen Herstellungskosten : eine mehrparametrische Steuerwirkungsanalyse für die Verschmelzung von Kapitalgesellschaften / Schwarz, Maren L. January 2006 (has links) (PDF) Univ., Diss.--Passau, 2005.
4	Elements of the Swiss market for electricity / Filippini, Massimo. January 1900 (has links) Habil.-Schrift Zürich (kein Austausch). / Im Buchh.: Heidelberg : Physica-Verlag. Bibliographie: p. 217-229.
5	The Transient and Persistent Efficiency of Italian and German Universities: A Stochastic Frontier Analysis Agasisti, Tommaso, Gralka, Sabine 06 October 2017 (has links) (PDF) Despite measures on the European level to increase the compatibility between the HE sectors of the member states, the recent literature exposes variations in their efficiencies. To gain insights into these differences we split the efficiency term according to the two management levels each university is confronted with. Utilizing a recent advancement in the method to measure efficiency, we separate short-term (transient) and long-term (persistent) efficiency, while controlling for unobserved institution specific heterogeneity. While the first term reflects the efficiency of the individual universities working within the country, the second term echoes the influence of the country specific overall HE structure. The cross-country comparison displays if the overall efficiency difference between countries is related to individual performance of their universities or their HE structure. This allows more purposeful policy recommendation and expands the literature regarding the efficiency of universities in a fundamental way. Choosing Italy and Germany as two important illustrative examples we can take advantage of a novel dataset including characteristics of institutions in both countries for an exceptional long period of time from 2001 to 2011. We show that the Italian universities exhibit a higher overall efficiency value than their German counterparts. With the individual universities working at the upper bound of efficiency in both countries, the overall inefficiency as well as the gap between the countries is caused by persistent, structural inefficiency. To expedite a true European Area of Higher Education future measures should hence aim at the country specific structure, not solely at affecting the activities of single universities. Stochastic Frontier Analyse Persistente Ineffizienz Hochschulen Tertiäre Bildung Kostenfunktion Italien Deutschland Stochastic Frontier Analysis Persistent Inefficiency Higher Education Costfunction Italy Germany ddc:330 rvk:QC 000 Volkswirtschaftslehre
6	Vertical Disintegration in the European Electricity Sector: Empirical Evidence on Lost Synergies Gugler, Klaus, Liebensteiner, Mario, Schmitt , Stephan 11 1900 (has links) (PDF) The EU has been promoting unbundling of the transmission grid from other stages of the electricity supply chain with the aim of fostering competition in the upstream stage of electricity generation. At presence, ownership unbundling is the predominant form of unbundling in Europe. However, the benefits of increased competition from ownership unbundling of the transmission grid may come at the cost of lost vertical synergies between the formerly integrated stages of electricity supply. The policy debate generally neglects such potential costs of unbundling, yet concentrates on its benefits. Therefore European cross-country evidence may shed some light on this issue. This study helps fill this void by empirically estimating the magnitude of economies of vertical integration (EVI) between electricity generation and transmission based on a quadratic cost function. For this purpose we employ novel firm-level panel data of major European electricity utilities. Our results confirm the presence of substantial EVI, which put the policy measure of transmission ownership unbundling into question. (authors' abstract) / Series: Department of Economics Working Paper Series RVK QR 600 ; JEL L22, L25, L51, Q48
7	Optimizing Notifications of Subscription-Based Forecast Queries Fischer, Ulrike, Böhm, Matthias, Lehner, Wolfgang, Pedersen, Torben Bach 27 January 2023 (has links) Integrating sophisticated statistical methods into database management systems is gaining more and more attention in research and industry. One important statistical method is time series forecasting, which is crucial for decision management in many domains. In this context, previous work addressed the processing of ad-hoc and recurring forecast queries. In contrast, we focus on subscription-based forecast queries that arise when an application (subscriber) continuously requires forecast values for further processing. Forecast queries exhibit the unique characteristic that the underlying forecast model is updated with each new actual value and better forecast values might be available. However, (re-)sending new forecast values to the subscriber for every new value is infeasible because this can cause significant overhead at the subscriber side. The subscriber therefore wishes to be notified only when forecast values have changed relevant to the application. In this paper, we reduce the costs of the subscriber by optimizing the notifications sent to the subscriber, i.e., by balancing the number of notifications and the notification length. We introduce a generic cost model to capture arbitrary subscriber cost functions and discuss different optimization approaches that reduce the subscriber costs while ensuring constrained forecast values deviations. Our experimental evaluation on real datasets shows the validity of our approach with low computational costs. info:eu-repo/classification/ddc/004 ddc:004
8	The Transient and Persistent Efficiency of Italian and German Universities: A Stochastic Frontier Analysis Agasisti, Tommaso, Gralka, Sabine 06 October 2017 (has links) Despite measures on the European level to increase the compatibility between the HE sectors of the member states, the recent literature exposes variations in their efficiencies. To gain insights into these differences we split the efficiency term according to the two management levels each university is confronted with. Utilizing a recent advancement in the method to measure efficiency, we separate short-term (transient) and long-term (persistent) efficiency, while controlling for unobserved institution specific heterogeneity. While the first term reflects the efficiency of the individual universities working within the country, the second term echoes the influence of the country specific overall HE structure. The cross-country comparison displays if the overall efficiency difference between countries is related to individual performance of their universities or their HE structure. This allows more purposeful policy recommendation and expands the literature regarding the efficiency of universities in a fundamental way. Choosing Italy and Germany as two important illustrative examples we can take advantage of a novel dataset including characteristics of institutions in both countries for an exceptional long period of time from 2001 to 2011. We show that the Italian universities exhibit a higher overall efficiency value than their German counterparts. With the individual universities working at the upper bound of efficiency in both countries, the overall inefficiency as well as the gap between the countries is caused by persistent, structural inefficiency. To expedite a true European Area of Higher Education future measures should hence aim at the country specific structure, not solely at affecting the activities of single universities. info:eu-repo/classification/ddc/330 ddc:330 Volkswirtschaftslehre
9	Processing reporting function views in a data warehouse environment Lehner, Wolfgang, Hummer, W., Schlesinger, L. 02 June 2022 (has links) Reporting functions reflect a novel technique to formulate sequence-oriented queries in SQL. They extend the classical way of grouping and applying aggregation functions by additionally providing a column-based ordering, partitioning, and windowing mechanism. The application area of reporting functions ranges from simple ranking queries (TOP(n)-analyses) over cumulative (Year-To-Date-analyses) to sliding window queries. We discuss the problem of deriving reporting function queries from materialized reporting function views, which is one of the most important issues in efficiently processing queries in a data warehouse environment. Two different derivation algorithms, including their relational mappings are introduced and compared in a test scenario. info:eu-repo/classification/ddc/004 ddc:004
10	Demand for Irrigation Water from Depleting Groundwater Resources: An Econometric Approach / Wassernachfrage und Bewässerung aus knappen Grundwasserressourcen: Ein ökonometrischer Ansatz Jamali Jaghdani, Tinoush 09 February 2012 (has links) No description available. 630 Landwirtschaft Veterinärmedizin YIO 900 Sonstige Agrarmärkte Agricultural Sciences Grundwasser Iran Rafsanajan Wassernachfrage Pistazienproduktion Translog-Kostenfunktion Räumliche konometrie Wasser-Spotmarkt Logit-Modell Heckman-Sample-Selection-Modell Groundwater Iran Rafsanjan water demand pistachio production translog cost function spatial econometrics spot water market logit model willingness to pay Heckman sample selection model 83.66 Agrarwirtschaft

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