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All (4)

All (4) ((4 results))

  • 1. Modified raking ratio estimation Archived
    Articles and reports: 12-001-X198700214608
    Description:

    A hybrid technique is described that employs both conventional and raking ratio estimation to handle the case when the population frequencies N_ij in a two-dimensional table are known, but some of the observed frequencies n_ij are small (or zero). Results are provided on the approach taken as it has evolved in the Corporate Statistics of Income Program over the last several years. Changes are still being considered and these will be discussed as well.

    Release date: 1987-12-15
  • 2. Comparing telephone and face-to-face interviewing in the United Kingdom Archived
    Articles and reports: 12-001-X198700114466
    Description:

    This paper presents results from methodological experiments comparing telephone and face-to-face interviewing in surveys of the general population. The relatively low level of telephone ownership in the United Kingdom, especially among the less privileged, argues the need for a dual-mode approach combining telephone interviews with face-to-face interviews for those without telephones. This approach depends on the absence of differential mode-effects on the answers obtained or on the ability to account for these effects when they occur.

    Release date: 1987-06-15
  • 3. On efficient estimation of unemployment rates from Labour Force Survey Data Archived
    Articles and reports: 12-001-X198700114510
    Description:

    The method of minimum Q^(T) estimation for complex survey designs proposed by Singh (1985) provides asymptotically efficient estimates of model parameters analogous to Neyman’s (1949) min X^2 estimation procedure for simple random samples. The Q^(T) can be viewed as a X^2 type statistic for categorical survey data, and min Q^(T) estimates provide a robust alternative to Weighted Least Squares estimates, which often display unstable behaviour for complex surveys. In this paper, the min Q^(T) method is first described and then illustrated for the problem of estimating parameters of a logit model for survey estimates of unemployment rates which are obtained from the October 1980 Canadian LFS data cross-classified according to age-education covariate categories. It is seen that the trace efficiency of smoothed estimates obtained by Kumar and Rao (1986), who applied the method of pseudo maximum likelihood estimates (pseudo mle) to the same problem can be slightly improved by the min Q^(T) method. Interestingly enough, pseudo mle for individual cells behave much the same way as the efficient min Q^(T) estimates for the particular LFS example.

    Release date: 1987-06-15
  • 4. A sampling procedure with inclusion probabilities proportional to size Archived
    Articles and reports: 12-001-X198700114511
    Description:

    A new unequal probability sampling scheme for selecting n(> 2) units without replacement from a finite population is proposed. This scheme ensures that the inclusion probabilities are proportional to sizes. It has the advantage of simplicity in selection and estimation and also provides a non-negative variance estimator. The variance of the Horvitz-Thompson (H-T) estimator under the proposed scheme is shown to be smaller than that of the customary estimator in probability proportional to size sampling with replacement. The proposed scheme also compares favourably with the without replacement scheme suggested by Sampford (1967) in an empirical study on a few natural populations.

    Release date: 1987-06-15
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Articles and reports (4)

Articles and reports (4) ((4 results))

  • 1. Modified raking ratio estimation Archived
    Articles and reports: 12-001-X198700214608
    Description:

    A hybrid technique is described that employs both conventional and raking ratio estimation to handle the case when the population frequencies N_ij in a two-dimensional table are known, but some of the observed frequencies n_ij are small (or zero). Results are provided on the approach taken as it has evolved in the Corporate Statistics of Income Program over the last several years. Changes are still being considered and these will be discussed as well.

    Release date: 1987-12-15
  • 2. Comparing telephone and face-to-face interviewing in the United Kingdom Archived
    Articles and reports: 12-001-X198700114466
    Description:

    This paper presents results from methodological experiments comparing telephone and face-to-face interviewing in surveys of the general population. The relatively low level of telephone ownership in the United Kingdom, especially among the less privileged, argues the need for a dual-mode approach combining telephone interviews with face-to-face interviews for those without telephones. This approach depends on the absence of differential mode-effects on the answers obtained or on the ability to account for these effects when they occur.

    Release date: 1987-06-15
  • 3. On efficient estimation of unemployment rates from Labour Force Survey Data Archived
    Articles and reports: 12-001-X198700114510
    Description:

    The method of minimum Q^(T) estimation for complex survey designs proposed by Singh (1985) provides asymptotically efficient estimates of model parameters analogous to Neyman’s (1949) min X^2 estimation procedure for simple random samples. The Q^(T) can be viewed as a X^2 type statistic for categorical survey data, and min Q^(T) estimates provide a robust alternative to Weighted Least Squares estimates, which often display unstable behaviour for complex surveys. In this paper, the min Q^(T) method is first described and then illustrated for the problem of estimating parameters of a logit model for survey estimates of unemployment rates which are obtained from the October 1980 Canadian LFS data cross-classified according to age-education covariate categories. It is seen that the trace efficiency of smoothed estimates obtained by Kumar and Rao (1986), who applied the method of pseudo maximum likelihood estimates (pseudo mle) to the same problem can be slightly improved by the min Q^(T) method. Interestingly enough, pseudo mle for individual cells behave much the same way as the efficient min Q^(T) estimates for the particular LFS example.

    Release date: 1987-06-15
  • 4. A sampling procedure with inclusion probabilities proportional to size Archived
    Articles and reports: 12-001-X198700114511
    Description:

    A new unequal probability sampling scheme for selecting n(> 2) units without replacement from a finite population is proposed. This scheme ensures that the inclusion probabilities are proportional to sizes. It has the advantage of simplicity in selection and estimation and also provides a non-negative variance estimator. The variance of the Horvitz-Thompson (H-T) estimator under the proposed scheme is shown to be smaller than that of the customary estimator in probability proportional to size sampling with replacement. The proposed scheme also compares favourably with the without replacement scheme suggested by Sampford (1967) in an empirical study on a few natural populations.

    Release date: 1987-06-15
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