| 1. |
- Andersson, Michael K., et al.
(author)
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Bootstrapping Error Component Models
- 2001
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In: Computational statistics (Zeitschrift). - : Physica Verlag. - 0943-4062 .- 1613-9658. ; 16:2, s. 221-231
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Journal article (peer-reviewed)abstract
- This paper proposes several resampling algorithms suitable for error component models and evaluates them in the context of bootstrap testing. In short, all the algorithms work well and lead to tests with correct or close to correct size. There is thus little or no reason not to use the bootstrap with error component models.
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| 2. |
- Arbin, Katarina, 1971-
(author)
-
E-procurement maturity in industry
- 2003
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In: International Journal of Electronic Business. - : InderScience Publishers. - 1470-6067 .- 1741-5063. ; 1:4, s. 396-407
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Journal article (peer-reviewed)abstract
- This paper aims to examine the use and implementation of electronic procurement for indirect material in eight large global companies, and investigate what kinds of barriers exist towards electronic procurement. The empirical evidence comes from interviews with e-procurement experts and operatives in eight global firms. Results show that three out of eight companies are using e-procurement and four are planning to do so in the future. Barriers shown by the empirical material are lack of technological standard, different IT-maturity among suppliers, resistance among users to leaving old suppliers, lack of support from top management, differences in language, culture and legal systems. Other barriers found are getting suppliers to update and control the electronic product catalogues and to monitor them and getting the users in the organisation to use the system.
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| 3. |
- Edenius, Mats, et al.
(author)
-
The balanced scorecard as an intellectual technology
- 2002
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In: Organization. - : SAGE Publications. - 1350-5084 .- 1461-7323. ; 9:2, s. 249-273
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Journal article (peer-reviewed)abstract
- In this article, we focus on the Balanced Scorecard (BSC) as a discursive practice. Instead of asking whether the figures in the BSC correspond to reality, or whether they serve the users' purposes and behave according to their intentions, we have chosen to analyse how the BSC partakes in shaping the world it is intended to reflect. Two case studies will be presented in order to demonstrate how the BSC works in this respect. In the first case, the main issue is how the BSC both naturalizes alleged cognitive limitations among managers and induces them to replace everyday knowledge with highly selective representations. After that, the BSC is shown to operate simultaneously as a straitjacket on strategic intentions and as a constituent of new patterns of action - but in ways that are loosely coupled to strategic intentions.
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| 4. |
- Karlsson, Sune, 1960-, et al.
(author)
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Computationally efficient double bootstrap variance estimation
- 2000
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In: Computational Statistics & Data Analysis. - : Elsevier. - 0167-9473 .- 1872-7352. ; 33:3, s. 237-247
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Journal article (peer-reviewed)abstract
- The double bootstrap provides a useful tool for bootstrapping approximately pivotal quantities by using an "inner" bootstrap loop to estimate the variance. When the estimators are computationally intensive, the double bootstrap may become infeasible. We propose the use of a new variance estimator for the nonparametric bootstrap which effectively removes the requirement to perform the inner loop of the double bootstrap. Simulation results indicate that the proposed estimator produce bootstrap-t confidence intervals with coverage accuracy which replicates the coverage accuracy for the standard double bootstrap.
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| 5. |
- Karlsson, Sune, 1960-, et al.
(author)
-
Maximum-likelihood based inference in the two-way random effects model with serially correlated time effects
- 2004
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In: Empirical Economics. - : Springer. - 0377-7332 .- 1435-8921. ; 29:1, s. 79-88
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Journal article (peer-reviewed)abstract
- The general case where the time specific effect in a two way model follows an arbitrary ARMA process has not been considered previously. We offer a straightforward maximum likelihood estimator for this case. Allowing for general ARMA processes raises the issue of model specification and we propose tests of the null hypothesis of no serial correlation as well as tests for discriminating between different specifications. A Monte-Carlo experiment evaluates the finite-sample properties of the estimators and test-statistics.
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| 6. |
- Karlsson, Sune, 1960-, et al.
(author)
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On the power and interpretation of panel unit root tests
- 2000
-
In: Economics Letters. - : Elsevier. - 0165-1765 .- 1873-7374. ; 66:3, s. 249-255
-
Journal article (peer-reviewed)abstract
- We demonstrate that panel unit root tests can have high power when a small fraction of the series is stationary and may lack power when a large fraction is stationary. The acceptance or rejection of the null is thus not sufficient evidence to conclude that all series have a unit root or that all are stationary.
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