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Aggregation-Based Feature Invention and Relational Concept Classes
Perlich, Claudia; Provost, Foster - 2003
Model induction from relational data requires aggregation of values ofattributes of related entities. This paper makes … needed to learn these concepts. (2) Expanding onelevel of the hierarchy, it introduces new aggregation operators thatmodel … byclass. (3) It demonstrates empirically on a noisy business domain thatmore-complex aggregation methods can increase …
Persistent link: https://www.econbiz.de/10009435047
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Individual QoS versus aggregate QoS: A loss performance study
Xu, Ying; Guérin, Roch A - 2005
This paper explores the differences that can exist between individual and aggregate loss guarantees in an environment where guarantees are only provided at an aggregate level. The focus is on understanding which traffic parameters are responsible for inducing possible deviations and to what...
Persistent link: https://www.econbiz.de/10009439223
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Privacy trade-offs in web-based services
Boyens, Claus - 2005
that can be carried out within the framework. - Design, analysis and implementation of an aggregation-based service …
Persistent link: https://www.econbiz.de/10009467121
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Forecasting Euro-Area Variables with German Pre-EMU Data
Brüggemann, Ralf; Lütkepohl, Helmut; Marcellino, … - 2008
It is investigated whether euro area variables can be forecast better based on synthetic time series for the pre-euro period or by using just data from Germany for the pre-euro period. Our forecast comparison is based on quarterly data for the period 1970Q1-2003Q4 for 10 macroeconomic variables....
Persistent link: https://www.econbiz.de/10009471761
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High frequency data aggregation and Value-at-Risk
Pranckevičiūtė, Milda - 2011
currencies position VaR estimates’ dependence on data aggregation functions (pointwise, maximum value, minimum value and average …. In the last chapter of the thesis the empirical study about Hurst index intraday value dependence on data aggregation …
Persistent link: https://www.econbiz.de/10009478835
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High frequency data aggregation and Value-at-Risk
Pranckevičiūtė, Milda - 2011
currencies position VaR estimates’ dependence on data aggregation functions (pointwise, maximum value, minimum value and average …. In the last chapter of the thesis the empirical study about Hurst index intraday value dependence on data aggregation …
Persistent link: https://www.econbiz.de/10009478836
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Testing procedures for detection of linear dependencies in efficiency models
Peyrache, A.; Coelli, T. - 2009
The validity of many efficiency measurement methods rely upon the assumption that variables such as input quantities and output mixes are independent of (or uncorrelated with) technical efficiency, however few studies have attempted to test these assumptions. In a recent paper, Wilson (2003)...
Persistent link: https://www.econbiz.de/10009448574
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Scanner data and the construction of price indices.
Ivancic, Lorraine, Economics, Australian School of … - 2007
particular reference to the issues of substitution bias and choice of aggregation dimensions. The potential costs and benefits of ….An Australian scanner data set is used to estimate substitution bias for six different aggregation methods and for fixed base and … sensitive to both the method of aggregation used and whether direct or chained indexes were used. The ILO (2004) recommends the …
Persistent link: https://www.econbiz.de/10009484217
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Spatial Aggregation and Prediction in the Hedonic Model
Fulcher, Charles Michael - 2003
as to the acceptability of spatial aggregation in hedonic property value models. Both statistical tests and tests based … upon prediction errors are performed in order to identify the circumstances under which aggregation is statistically … importance of specification and functional form as determinants of both the acceptability of aggregation and predictive power …
Persistent link: https://www.econbiz.de/10009431197
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Sectoral mark-up dynamics in Spain
Estrada García, Angel; López Salido, J. David - 2005
In this paper we show that value-added mark-ups tend to be pro-cyclical in manufacturing and counter-cyclical in market services. However, at the sectoral level value-added mark-ups may be misinterpreted if intermediate input variations are ignored. This is particularly true in the case of the...
Persistent link: https://www.econbiz.de/10012530066