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- Articles and reports: 11-522-X20040018733Description:
A survey on injecting drug users is designed to use the information collected from needle exchange centres and from sampled injecting drug users. A methodology is developed to produce various estimates.
Release date: 2005-10-27 - Articles and reports: 11-621-M2005032Geography: CanadaDescription:
This study provides an in-depth analysis of retail trade growth nationally and provincially, and explores the underlying socio-economic-demographic forces since the turn of the millennium. The automotive retail sector is given a closer look because of its ability to dictate retail sales growth during the period. This study uses data from a fleet of Statistics Canada surveys, including Monthly Retail Trade Survey, Provincial Economic Accounts, New Motor Vehicle Sales, Canadian Vehicle Survey, Motor Vehicle Registration, and 2002 Homeowner Repairs and Renovations Survey.
Release date: 2005-10-17 - 3. Who gains from computer use? ArchivedArticles and reports: 75-001-X200510713146Geography: CanadaDescription:
Workers who use computers earn more than those who do not. Is this a productivity effect or merely selection (that is, workers selected to use computers are more productive to begin with). After controlling for selection, the average worker enjoys a wage premium of 3.8% upon adopting a computer. This premium, however, obscures important differences by education and occupation. Long-run returns to computer use are over 5% for most workers. Differences between short-run and long-run returns suggest that workers may share training costs through sacrificed wages.
Release date: 2005-09-21 - Articles and reports: 12-001-X20050018083Description:
The advent of computerized record linkage methodology has facilitated the conduct of cohort mortality studies in which exposure data in one database are electronically linked with mortality data from another database. This, however, introduces linkage errors due to mismatching an individual from one database with a different individual from the other database. In this article, the impact of linkage errors on estimates of epidemiological indicators of risk such as standardized mortality ratios and relative risk regression model parameters is explored. It is shown that the observed and expected number of deaths are affected in opposite direction and, as a result, these indicators can be subject to bias and additional variability in the presence of linkage errors.
Release date: 2005-07-21 - Articles and reports: 12-001-X20050018088Description:
When administrative records are geographically linked to census block groups, local-area characteristics from the census can be used as contextual variables, which may be useful supplements to variables that are not directly observable from the administrative records. Often databases contain records that have insufficient address information to permit geographical links with census block groups; the contextual variables for these records are therefore unobserved. We propose a new method that uses information from "matched cases" and multivariate regression models to create multiple imputations for the unobserved variables. Our method outperformed alternative methods in simulation evaluations using census data, and was applied to the dataset for a study on treatment patterns for colorectal cancer patients.
Release date: 2005-07-21 - 6. Escaping low earnings ArchivedArticles and reports: 75-001-X200510413141Geography: CanadaDescription:
Prolonged periods of low earnings can limit an individual's capacity to cope with income losses or unexpected expenses, and makes economic self-sufficiency difficult. The ability to escape low earnings is linked to a number of factors, including age, firm size, and changing jobs.
Release date: 2005-06-20 - 7. Aboriginal Peoples Living Off-reserve in Western Canada: Estimates from the Labour Force Survey ArchivedJournals and periodicals: 71-587-XGeography: Canada, Province or territoryDescription:
This paper provides information on Aboriginal employment and unemployment, Aboriginal youths and the impact of education on labour market performance in Manitoba, Saskatchewan, Alberta and British Columbia. Annual average data from the Labour Force Survey (LFS) on off-reserve Aboriginal peoples from April 2004 to March 2005 are used.
Release date: 2005-06-13 - Articles and reports: 12-001-X20040027753Description:
Samplers often distrust model-based approaches to survey inference because of concerns about misspecification when models are applied to large samples from complex populations. We suggest that the model-based paradigm can work very successfully in survey settings, provided models are chosen that take into account the sample design and avoid strong parametric assumptions. The Horvitz-Thompson (HT) estimator is a simple design-unbiased estimator of the finite population total. From a modeling perspective, the HT estimator performs well when the ratios of the outcome values and the inclusion probabilities are exchangeable. When this assumption is not met, the HT estimator can be very inefficient. In Zheng and Little (2003, 2004) we used penalized splines (p-splines) to model smoothly - varying relationships between the outcome and the inclusion probabilities in one-stage probability proportional to size (PPS) samples. We showed that p spline model-based estimators are in general more efficient than the HT estimator, and can provide narrower confidence intervals with close to nominal confidence coverage. In this article, we extend this approach to two-stage sampling designs. We use a p-spline based mixed model that fits a nonparametric relationship between the primary sampling unit (PSU) means and a measure of PSU size, and incorporates random effects to model clustering. For variance estimation we consider the empirical Bayes model-based variance, the jackknife and balanced repeated replication (BRR) methods. Simulation studies on simulated data and samples drawn from public use microdata in the 1990 census demonstrate gains for the model-based p-spline estimator over the HT estimator and linear model-assisted estimators. Simulations also show the variance estimation methods yield confidence intervals with satisfactory confidence coverage. Interestingly, these gains can be seen for a common equal-probability design, where the first stage selection is PPS and the second stage selection probabilities are proportional to the inverse of the first stage inclusion probabilities, and the HT estimator leads to the unweighted mean. In situations that most favor the HT estimator, the model-based estimators have comparable efficiency.
Release date: 2005-02-03 - Articles and reports: 11-522-X20030017703Description:
This study reweighted data from the Behavioural Risk Factor Surveillance System (BRFSS), an ongoing, state-based telephone survey in the United States, to produce more accurate child estimates.
Release date: 2005-01-26 - 10. Measurement of health care utilization in Canada: Agreement between surveys and administrative records ArchivedArticles and reports: 11-522-X20030017706Description:
This paper examines the differences between self-reported health utilization data and provincial administrative records in Canada.
Release date: 2005-01-26
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Articles and reports (9)
Articles and reports (9) ((9 results))
- Articles and reports: 11-522-X20040018733Description:
A survey on injecting drug users is designed to use the information collected from needle exchange centres and from sampled injecting drug users. A methodology is developed to produce various estimates.
Release date: 2005-10-27 - Articles and reports: 11-621-M2005032Geography: CanadaDescription:
This study provides an in-depth analysis of retail trade growth nationally and provincially, and explores the underlying socio-economic-demographic forces since the turn of the millennium. The automotive retail sector is given a closer look because of its ability to dictate retail sales growth during the period. This study uses data from a fleet of Statistics Canada surveys, including Monthly Retail Trade Survey, Provincial Economic Accounts, New Motor Vehicle Sales, Canadian Vehicle Survey, Motor Vehicle Registration, and 2002 Homeowner Repairs and Renovations Survey.
Release date: 2005-10-17 - 3. Who gains from computer use? ArchivedArticles and reports: 75-001-X200510713146Geography: CanadaDescription:
Workers who use computers earn more than those who do not. Is this a productivity effect or merely selection (that is, workers selected to use computers are more productive to begin with). After controlling for selection, the average worker enjoys a wage premium of 3.8% upon adopting a computer. This premium, however, obscures important differences by education and occupation. Long-run returns to computer use are over 5% for most workers. Differences between short-run and long-run returns suggest that workers may share training costs through sacrificed wages.
Release date: 2005-09-21 - Articles and reports: 12-001-X20050018083Description:
The advent of computerized record linkage methodology has facilitated the conduct of cohort mortality studies in which exposure data in one database are electronically linked with mortality data from another database. This, however, introduces linkage errors due to mismatching an individual from one database with a different individual from the other database. In this article, the impact of linkage errors on estimates of epidemiological indicators of risk such as standardized mortality ratios and relative risk regression model parameters is explored. It is shown that the observed and expected number of deaths are affected in opposite direction and, as a result, these indicators can be subject to bias and additional variability in the presence of linkage errors.
Release date: 2005-07-21 - Articles and reports: 12-001-X20050018088Description:
When administrative records are geographically linked to census block groups, local-area characteristics from the census can be used as contextual variables, which may be useful supplements to variables that are not directly observable from the administrative records. Often databases contain records that have insufficient address information to permit geographical links with census block groups; the contextual variables for these records are therefore unobserved. We propose a new method that uses information from "matched cases" and multivariate regression models to create multiple imputations for the unobserved variables. Our method outperformed alternative methods in simulation evaluations using census data, and was applied to the dataset for a study on treatment patterns for colorectal cancer patients.
Release date: 2005-07-21 - 6. Escaping low earnings ArchivedArticles and reports: 75-001-X200510413141Geography: CanadaDescription:
Prolonged periods of low earnings can limit an individual's capacity to cope with income losses or unexpected expenses, and makes economic self-sufficiency difficult. The ability to escape low earnings is linked to a number of factors, including age, firm size, and changing jobs.
Release date: 2005-06-20 - Articles and reports: 12-001-X20040027753Description:
Samplers often distrust model-based approaches to survey inference because of concerns about misspecification when models are applied to large samples from complex populations. We suggest that the model-based paradigm can work very successfully in survey settings, provided models are chosen that take into account the sample design and avoid strong parametric assumptions. The Horvitz-Thompson (HT) estimator is a simple design-unbiased estimator of the finite population total. From a modeling perspective, the HT estimator performs well when the ratios of the outcome values and the inclusion probabilities are exchangeable. When this assumption is not met, the HT estimator can be very inefficient. In Zheng and Little (2003, 2004) we used penalized splines (p-splines) to model smoothly - varying relationships between the outcome and the inclusion probabilities in one-stage probability proportional to size (PPS) samples. We showed that p spline model-based estimators are in general more efficient than the HT estimator, and can provide narrower confidence intervals with close to nominal confidence coverage. In this article, we extend this approach to two-stage sampling designs. We use a p-spline based mixed model that fits a nonparametric relationship between the primary sampling unit (PSU) means and a measure of PSU size, and incorporates random effects to model clustering. For variance estimation we consider the empirical Bayes model-based variance, the jackknife and balanced repeated replication (BRR) methods. Simulation studies on simulated data and samples drawn from public use microdata in the 1990 census demonstrate gains for the model-based p-spline estimator over the HT estimator and linear model-assisted estimators. Simulations also show the variance estimation methods yield confidence intervals with satisfactory confidence coverage. Interestingly, these gains can be seen for a common equal-probability design, where the first stage selection is PPS and the second stage selection probabilities are proportional to the inverse of the first stage inclusion probabilities, and the HT estimator leads to the unweighted mean. In situations that most favor the HT estimator, the model-based estimators have comparable efficiency.
Release date: 2005-02-03 - Articles and reports: 11-522-X20030017703Description:
This study reweighted data from the Behavioural Risk Factor Surveillance System (BRFSS), an ongoing, state-based telephone survey in the United States, to produce more accurate child estimates.
Release date: 2005-01-26 - 9. Measurement of health care utilization in Canada: Agreement between surveys and administrative records ArchivedArticles and reports: 11-522-X20030017706Description:
This paper examines the differences between self-reported health utilization data and provincial administrative records in Canada.
Release date: 2005-01-26
Journals and periodicals (1)
Journals and periodicals (1) ((1 result))
- 1. Aboriginal Peoples Living Off-reserve in Western Canada: Estimates from the Labour Force Survey ArchivedJournals and periodicals: 71-587-XGeography: Canada, Province or territoryDescription:
This paper provides information on Aboriginal employment and unemployment, Aboriginal youths and the impact of education on labour market performance in Manitoba, Saskatchewan, Alberta and British Columbia. Annual average data from the Labour Force Survey (LFS) on off-reserve Aboriginal peoples from April 2004 to March 2005 are used.
Release date: 2005-06-13
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