Department of Economics / Institutionen för nationalekonomi med statistik: Recent submissions
Now showing items 481-500 of 1135
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On assessing multivariate normality
(University of Gothenburg, 2001-01-01)Statistical analysis frequently relies on the assumption of normality. Though normality may often be relaxed in view of inferences of for example population expectations, it can be crucial in other aspects such as diagnostic ... -
Optimal surveillance Based on exponentially weighted moving averages
(University of Gothenburg, 2002-01-01)Statistical surveillance is used to detect an important change in a process as soon as possible after it has occurred, with control of false alarms. The EWMA, exponentially weighted moving average, method for surveillance ... -
Statistical surveillance. Optimality and methods.
(University of Gothenburg, 2002-02-01)Different criteria of optimality are used in different subcultures of statistical surveillance. One aim with this review is to bridge the gap between the different areas. The shortcomings of some criteria of optimality are ... -
Bayes prediction of binary outcomes based on correlated discrete predictors.
(University of Gothenburg, 2002-03-01)An approach based on Bayes theorem is proposed for predicting the binary outcomes X = 0, 1, given that a vector of predictors Z has taken the value z. It is assumed that Z can be decomposed into 9 independent vectors given ... -
Prediction of work resumption among men and women with lower back- and neck pain in a Swedish population
(University of Gothenburg, 2002-04-01)An approach based on Bayes theorem is used to predict the binary outcome of work resumption X, where X = 1 if no work resumption and X = 0 otherwise, given a vector of discrete predictors Z for men and women with lower ... -
Prediction of work resumption in theory and practice
(University of Gothenburg, 2002-05-01)In Sweden, the number oflong-term sick-listed has increased by about 30% per year during the period 1997-2001, and the cost for health insurance is 108 billion SEK in the state budget (2002). Thus, the prediction of work ... -
Detection of turning points in business cycles
(University of Gothenburg, 2002-06-01)Methods for on-line monitoring of business cycles are compared with respect to the ability of early prediction of the next turn by an alarm for a turn in a leading index. Three likelihood based methods for turning point ... -
Some statistical aspects on methods for detection of turning points in business cycles
(University of Gothenburg, 2002-07-01)Statistical and practical aspects on methods for on-line turning point detection in business cycles are discussed. When a method is used on a real data set, there are a number of special data problems to be considered. ... -
ON SOME PREDICTION METHODS FOR CATEGORICAL DATA
(University of Gothenburg, 1991-01-01)Good prediction methods are important in many fields where qualitative variables are involved. The criterion of a good prediction method, used in this paper, is the average mean squared error. This criterion is used to ... -
ON TESTS OF EQUIVALENCE
(University of Gothenburg, 1990-02-01)We will study here a general method for constructing equivalence tests for problems with onedimensional or multidimensional parameter. In the biometric field, the equivalence tests have been studied by many authors under ... -
ABSTRACT BOOTSTRAP CONFIDENCE INTERVALS IN LINEAR MODELS
(University of Gothenburg, 1990-01-01)A bootstrap method for generating confidence intervals in linear models is suggested. The method is motivated by an abstract nonobservable bootstrap sample of true residuals leading to an observable final result. This means ... -
TESTING THE APPROXIMATE AGREEMENT WITH A HYPOTHESIS
(University of Gothenburg, 1986-05-01)When statistical tests are applied it is often known beforehand that the hypotheses would be rejected with sufficiently narge sample sizes. This happens whenever hypotheses is not exactly true but only approximately true. ... -
A TIPPETT-ADAPTIVE METHOD OF COMBINING INDEPENDENT STATISTICAL TESTS.
(University of Gothenburg, 1986-03-01)A new procedure is proposed in order to combine the information of P-values obtained from several independent tests in order to test an overall hypothesis. The test statistic of this new procedure is of the same type as ... -
PARAMETRIC AND NONPARAMETRIC TESTS FOR BXOEQUIVALENCE TRIALS
(University of Gothenburg, 1986-02-01)In pharmacology, comparison of bioavailability is an important problem. A new formulation of a drug is compared with a standard formulation in human subjects. When the extent of absorption is studied the areas under the ... -
MULTIPLE COMPARISON TESTS BASED ON THE BOOTSTRAP
(University of Gothenburg, 1986-01-01)A multiple test procedure for pairwise comparisons based on the bootstrap is presented. It is a stagewise test without any distributional assumptions. It is also very general according to the number and types of hypotheses ... -
NONPARAMETRIC REGRESSION WlITH SIMPLE CURVE CHARACTERISTICS
(University of Gothenburg, 1985-04-01)The character of nonparametric statistical methods is that they are constructed for very general situations, without the specific narrow assumptions, which appear in the common parametric methods. Isotonic regression is a ... -
ANALYS AV KATEGORISKA DATA - En metodstudie i anslutning till statsvetenskaplig forskning.
(University of Gothenburg, 1983-02-01)Inriktningen av denna rapport har praglats av forfattarens erfarenheter fran arbetet med urvalsplaner for delundersokningarna avseende medborgare, politiker och tjansteman inom forskningsprogrammet 1979-1981 for utvardering ... -
HOUSEHOLD MARKET AND NON-MARKET ACTIVITIES - DESIGN ISSUES FOR A PILOT STUDY
(University of Gothenburg, 1982-02-01)The design of a pilot survey of households is the subject of this paper. A few methods to collect data about consumption expenditures and time-use are to be compared. Among the design issues are the allocation of the ... -
Minimax Optimality of CUSUM for an Autoregressive Model
(University of Gothenburg, 2011-02-11)Different change point models for AR(1) processes are reviewed. For some models, the change is in the distribution conditional on earlier observations. For others the change is in the unconditional distribution. Some models ... -
Methods and evaluations for surveillance in industry, business, finance, and public health
(University of Gothenburg, 2011-02-10)n overview on surveillance in different areas is given. Even though methods have been developed under different scientific cultures, the statistical concepts can be the same. When the statistical problems are the same, ...