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    Wyświetlanie 1-12 z 12
    Tytuł:
    The Class of Estimators of Finite Population Mean Using Incomplete Multi-Auxiliary Information
    Autorzy:
    Srivastava, Meenakshi
    Garg, Neha
    Powiązania:
    https://bibliotekanauki.pl/articles/466065.pdf
    Data publikacji:
    2013
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    bias
    mean square error
    multi-auxiliary information
    Opis:
    In this paper, a class of estimators is considered for estimating the mean of the finite population utilizing available incomplete multi-auxiliary information. Some special cases of this class of estimators are considered. The approximate expressions for bias and mean square error of the suggested estimators have also been derived and theoretical results are numerically supported.
    Źródło:
    Statistics in Transition new series; 2013, 14, 2; 201-216
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    To Misreport or not to report? The Case of the Italian Survey on Household Income and Wealth
    Autorzy:
    Neri, Andrea
    Rannalli, M. Giovanna
    Powiązania:
    https://bibliotekanauki.pl/articles/466032.pdf
    Data publikacji:
    2011
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    Unit Nonresponse
    Measurement Error
    Auxiliary Information
    Subsampling
    Imputation
    Opis:
    The objective of the paper is to adjust for the bias due to unit nonresponse and measurement error in survey estimates of total household financial wealth. Sample surveys are a useful source of information on household wealth. Yet, survey estimates are affected by nonsampling errors. In particular, when it comes to household wealth, unit nonresponse and measurement error can severely bias the estimates. Using the Italian Survey on Household Income and Wealth, we exploit the available auxiliary information in order to assess the magnitude of such a bias. We find evidence that for this kind of surveys, nonsampling errors are a major issue to deal with, possibly more serious than sampling errors. Moreover, in the case of SHIW the potential bias due to measurement error seems to outweigh by far that induced by nonresponse.
    Źródło:
    Statistics in Transition new series; 2011, 12, 2; 281-300
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Best Linear Unbiased Estimators of Population Mean on Current Occasion in Two-Occasion Rotation Patterns
    Autorzy:
    Singh, G. N.
    Prasad, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/465782.pdf
    Data publikacji:
    2013
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    successive sampling
    auxiliary information
    unbiased
    variance
    optimum replacement policy
    Opis:
    Best linear unbiased estimators have been proposed to estimate the population mean on current occasion in two-occasion successive (rotation) sampling. Behavior of the proposed estimators have been studied and their respective optimum replacement policies are discussed. Empirical studies are carried out to examine the performance of the proposed estimators and consequently the suitable recommendations are made.
    Źródło:
    Statistics in Transition new series; 2013, 14, 1; 57-74
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthetic Estimators Using Auxiliary Information in Small Domains
    Autorzy:
    Rai, P. K.
    Pandey, K. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/465709.pdf
    Data publikacji:
    2013
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    auxiliary information
    small area (domain) estimation synthetic estimation
    optimum weights
    Opis:
    In the present article we discuss the generalized class of synthetic estimators for estimating the population mean of small domains under the information of two auxiliary variables, and describe the special cases under the different values of the constant beta involved in the proposed generalized class of synthetic estimator. In addition we have taken a numerical illustration for the two auxiliary variables and compared the result for the synthetic ratio estimator under single and two auxiliary variables.
    Źródło:
    Statistics in Transition new series; 2013, 14, 1; 31-44
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Small Area Prediction under Alternative Model Specifications
    Autorzy:
    Erciulescu, Andreea L.
    Fuller, Wayne A.
    Powiązania:
    https://bibliotekanauki.pl/articles/465723.pdf
    Data publikacji:
    2016
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    unit level model
    parametric bootstrap
    double bootstrap
    measurement error
    auxiliary information
    Opis:
    Construction of small area predictors and estimation of the prediction mean squared error, given different types of auxiliary information are illustrated for a unit level model. Of interest are situations where the mean and variance of an auxiliary variable are subject to estimation error. Fixed and random specifications for the auxiliary variables are considered. The efficiency gains associated with the random specification for the auxiliary variable measured with error are demonstrated. A parametric bootstrap procedure is proposed for the mean squared error of the predictor based on a logit model. The proposed bootstrap procedure has smaller bootstrap error than a classical double bootstrap procedure with the same number of samples.
    Źródło:
    Statistics in Transition new series; 2016, 17, 1; 9-24
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modified Estimators of Population Variance in Presence of Auxiliary Information
    Autorzy:
    Tailor, Rajesh
    Sharma, Balkishan
    Powiązania:
    https://bibliotekanauki.pl/articles/465891.pdf
    Data publikacji:
    2012
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    Finite population variance
    Bias
    Mean squared error Auxiliary information and Efficiency
    Opis:
    This paper proposes estimator of population variance using information on known parameters of auxiliary variable. The variances of the proposed estimators are obtained. It has been shown that using modified sampling fraction the proposed estimators are more efficient than the usual unbiased estimator of population variance and usual ratio estimator for population variance under certain given conditions. Empirical study is also carried out to demonstrate the merits of the proposed estimators of population variance over other estimators considered in this paper.
    Źródło:
    Statistics in Transition new series; 2012, 13, 1; 37-46
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bootstrap Method with Calibration for Standard Error Estimators of Income Poverty Measures
    Autorzy:
    Zięba-Pietrzak, Agnieszka
    Kordos, Jan
    Wieczorkowski, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/465812.pdf
    Data publikacji:
    2011
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    Auxiliary information
    Bootstrap
    Calibration
    Complex sample surveys
    EU-SILC
    Poverty indicators
    Weighting
    Opis:
    The authors begin with calibration approach in sample surveys, focussing on the Eurostat approach. Next, the indicators of poverty and social exclusion are discussed as an essential tool for monitoring progress in the reduction of these problems. Most of these indicators are calculated according to the Eurostat recommendations, using data from European Statistics on Income and Living Conditions (EU-SILC). Complex sample design of the EU-SILC requires weighted analyses for estimates of population parameters and approximate methods of standard error estimation. In our study McCarthy and Snowden (1985) bootstrap method for standard errors estimation of income poverty measures is presented. In the next step the reweighting of bootstrap weights is applied and results of such calibration are discussed.
    Źródło:
    Statistics in Transition new series; 2011, 12, 1; 81-96
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of Population Mean in Post-Stratified Sampling Using Known Value of Some Population Parameter(S)
    Autorzy:
    Onyeka, Aloy C.
    Powiązania:
    https://bibliotekanauki.pl/articles/465814.pdf
    Data publikacji:
    2012
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    Auxiliary information
    general family of estimators post-stratified sampling
    mean squared errors
    Opis:
    Following Khoshnevisan et.al. (2007) and Koyuncu and Kadilar (2009), this paper develops a general family of combined estimators of the population mean in post-stratified sampling (PSS) scheme, using known values of some population parameters of an auxiliary variable. Properties of the proposed family of estimators, including conditions for optimal efficiency, are obtained up to first order approximations. The results are illustrated empirically.
    Źródło:
    Statistics in Transition new series; 2012, 13, 1; 65-78
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Percentile-Adjusted Estimation of Poverty Indicators for Domains Under Outlier Contamination
    Autorzy:
    Veijanen, Ari
    Lehtonen, Risto
    Powiązania:
    https://bibliotekanauki.pl/articles/466042.pdf
    Data publikacji:
    2011
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    small area estimation
    poverty indicator
    income data
    bias correction
    auxiliary information
    mixed model
    prediction
    Opis:
    Traditional estimation of poverty and inequality indicators, such as the Gini coefficient, for regions does not currently use auxiliary information or models fitted to income survey data. A predictor-type estimator constructed from ordinary mixed model predictions is not necessarily useful, as the predictions have too small spread for estimation of income statistics. Ordinary bias corrections are aimed at correcting the expectation of predictions, but poverty indicators would not be affected at all by a correction involving multiplication of predictions. We need a method improving the shape of the distribution of predictions, as poverty indicators describe differences of income between people. We therefore introduce a transformation bringing the percentiles of transformed predictions closer to the percentiles of sample values. The experiments show that the transformation results in smaller MSE of a predictor. If unit-level data from population are not available, the marginal domain frequencies of qualitative auxiliary variables can be successfully incorporated into a new calibration-based predictor-type estimator. The results are based on design-based simulation experiments where we use a population generated from an EU-wide income survey. The study is a part of the AMELI project funded by the European Union under the Seventh Framework Programme for research and technological development (FP7).
    Źródło:
    Statistics in Transition new series; 2011, 12, 2; 345-356
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some Rotation Patterns in Two-Phase Sampling
    Autorzy:
    Singh, G. N.
    Prasad, Shakti
    Powiązania:
    https://bibliotekanauki.pl/articles/465915.pdf
    Data publikacji:
    2011
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    Two-phase, successive sampling
    auxiliary information
    chain-type
    bias
    mean square error
    optimum replacement policy
    Opis:
    A problem related to the estimation of population mean on the current occasion using two-phase successive (rotation) sampling on two occasions has been considered. Two-phase ratio, regression and chain-type estimators for estimating the population mean on current (second) occasion have been proposed. Properties of the proposed estimators have been studied and their respective optimum replacement policies are discussed. Estimators are compared with the sample mean estimator, when there is no matching and the natural optimum estimator, which is a linear combination of the means of the matched and unmatched portions of the sample on the current occasion. Results are demonstrated through empirical means of comparison and suitable recommendations are made.
    Źródło:
    Statistics in Transition new series; 2011, 12, 1; 25-44
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On Efficient Difference Type Estimators
    Autorzy:
    Swain, A. K. P. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/465693.pdf
    Data publikacji:
    2010
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    Difference type
    Ratio type and Regression type estimators
    Efficiencies of estimators
    Auxiliary information
    Simple random sampling without replacement
    Opis:
    This paper considers a more efficient difference type estimator in a finite population set-up. Ratio type and regression type estimators are derived as special cases. Further efficiencies of these estimators are compared with classical ratio and regression estimators. Numerical illustrations are provided to compare efficiencies of different competitive estimators.
    Źródło:
    Statistics in Transition new series; 2010, 11, 3; 128-135
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A General Class of Mean Estimators Using Mixture of Auxiliary Variables for Two-Phase Sampling in the Presence of Non-Response
    Autorzy:
    Ahmad, Zahoor
    Zubair, Rahma
    Shahid, Ummara
    Powiązania:
    https://bibliotekanauki.pl/articles/465687.pdf
    Data publikacji:
    2014
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    non-response
    multi-auxiliary variables
    regression-cum-ratioexponential
    estimators
    no information case
    Opis:
    In this paper we have proposed a general class of estimators for two-phase sampling to estimate the population mean in the case when non-responses occur at the first phase. Furthermore, several continuous and categorical auxiliary variable(s) have been simultaneously used while constructing the class. Also, it is assumed that the information on all auxiliary variables is not available for population, which is often the case. The expressions of the mean square error of the suggested class have been derived and several special cases of the proposed class have been identified. The empirical study has also been conducted.
    Źródło:
    Statistics in Transition new series; 2014, 15, 4; 501-524
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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