نتایج جستجو برای: a dummy variable is added
تعداد نتایج: 14150687 فیلتر نتایج به سال:
The Japanese language has a lot of functional expressions, which consist of more than one word and behave like a single functional word. A remarkable characteristic of Japanese functional expressions is that each functional expression has many different surface forms. This paper proposes a methodology for compilation of a dictionary of Japanese functional expressions with hierarchical organizat...
In this note we point out that in panel models which include an attribute variable together with fixed effects, circumventing the dummy variable trap by an arbitrary zero restriction straightly leads to serious misinterpretations. As an example we consider the widely cited paper by Kalyanaram and Urban (1992) on the impact of order of market entry on the market share. We show that their major f...
The economic effects of federalism are unclear: some papers find that federalism has strong positive effects on a number of economically relevant variables, others find negative effects. The results often crucially hinge upon the proxies for federalism used. In this paper, we critically survey the existing indicators for both federalism and fiscal decentralization. We argue that federalism is a...
A new heteroskedastic hedonic regression model is suggested. It takes into account time-varying volatility and is applied to a blue chips art market. Furthermore, a nonparametric local likelihood estimator is used. This estimator is more precise than the often used dummy variables method. The empirical analysis reveals that errors are considerably non-Gaussian, and that a student distribution w...
Anonymität im Internet ist nicht gegeben, da Verkehrsdaten (Quellund Zieladressen) offen vorliegen. Ein Ansatz zur Gewährleistung von Anonymität sind die bekannten Mixe. Fast alle Vorschläge der Mixe für das Internet verzichten auf den Einsatz von Dummy-Nachrichten. Durch den Verzicht von Dummy-Nachrichten ist es verschiedenen Angriffsmethoden möglich, den Schutz zu kompromittieren. Der sogenan...
In data exchange, data are materialised from a source schema to a target schema, according to suitable source-to-target constraints. Constraints are also expressed on the target schema to represent the domain of interest. A schema mapping is the union of the source-to-target and of the target constraints. In this paper, we address the problem of containment of schema mappings for data exchange,...
To understand the potentials of bayesian panel data analysis, simulated data are used to estimate a random effects model. Prior Gaussian distributions of various precision are used to understand the influence of the prior information on continuous, discrete, time varying and time constant variables. It is demonstrated that parameters of dummy variables are far more sensitive to priors than para...
“Within” estimation of the fixed-effect stochastic frontier model does not identify parameters on time-invariant explanatory variables. If time-invariant variables are important production inputs, then standard efficiency estimates are biased. This note details bias correction, when time-invariant inputs are dummy variables. © 2006 Elsevier B.V. All rights reserved.
In Section 5 below we use the notation for volume integrals as explained in Chapter 4 of Vol.II of [FDS]. In particular, let a mapping h : D −→ W be given whose domain D is a region in a Euclidean space, a vector space, or the real line, and whose codomain W is a linear space. Then, the volume integral of h over a suitable subregion P of D, if meaningful, is denoted by ∫ P h or ∫ P h(x)dx. In t...
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