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All (84) (0 to 10 of 84 results)
- Articles and reports: 82-003-S200700010361Description:
This article summarizes the background, history and rationale for the Canadian Health Measures Survey, and provides an overview of the objectives, methods and analysis plans.
Release date: 2007-12-05 - Articles and reports: 82-003-S200700010363Description:
This overview describes the sampling strategy used to meet the collection and estimation requirements of the Canadian Health Measures Survey.
Release date: 2007-12-05 - Articles and reports: 82-003-S200700010364Description:
This article describes how the Canadian Health Measures Survey has addressed the ethical, legal and social issues (ELSI) arising from the survey. The development of appropriate procedures and the rationale behind them are discussed in detail for some specific ELSI.
Release date: 2007-12-05 - Articles and reports: 82-003-S200700010366Description:
This article describes some of the logistical and operational requirement and procedures employed to perform the clinic component of the Canadian Health Measures Survey.
Release date: 2007-12-05 - Articles and reports: 82-003-X200710113309Geography: CanadaDescription:
This article summarizes the design, methods and results emerging from the Canadian Health Measures Survey pre-test, which took place from October through December 2004 in Calgary, Alberta.
Release date: 2007-12-05 - 6. Estimating TFP in the Presence of Outliers and Leverage Points: An Examination of the KLEMS Dataset ArchivedArticles and reports: 11F0027M2007047Geography: CanadaDescription: This paper examines the effect of aberrant observations in the Capital, Labour, Energy, Materials and Services (KLEMS) database and a method for dealing with them. The level of disaggregation, data construction and economic shocks all potentially lead to aberrant observations that can influence estimates and inference if care is not exercised. Commonly applied pre-tests, such as the augmented Dickey-Fuller and the Kwaitkowski, Phillips, Schmidt and Shin tests, need to be used with caution in this environment because they are sensitive to unusual data points. Moreover, widely known methods for generating statistical estimates, such as Ordinary Least Squares, may not work well when confronted with aberrant observations. To address this, a robust method for estimating statistical relationships is illustrated.Release date: 2007-12-05
- Stats in brief: 89-628-X2007001Geography: CanadaDescription:
The Participation and Activity Limitation Survey (PALS) is Canada's national survey that gathers information about adults and children whose daily activities are limited by a physical, mental, or other health-related condition or problem.
This report presents some basic information about the survey and an overview of the methodological and content changes between the 2001 and 2006 PALS. The major difference involves a change in coverage resulting from the inclusion of a number of aboriginal communities, the addition of the three territories, and the modification to the definition of collective dwellings.
Release date: 2007-12-03 - Articles and reports: 75F0002M2007007Description: The Survey of Labour and Income Dynamics (SLID), introduced in the 1993 reference year, is a longitudinal panel survey of individuals. The purpose of the survey is to measure changes in the economic well-being of individuals and the factors that influence these changes. SLID's sample is divided into two overlapping panels, each six years in length. Longitudinal surveys like SLID are complex due to the dynamic nature of the sample, which in turn is due to the ever-changing composition of households and families over the years. For each reference year, SLID produces two sets of weights: one is representative of the initial population (the longitudinal weights), while the other is representative of the current population (the cross-sectional weights). Since 2002, SLID has been producing a third set of weights which combines two panels that overlap to form a new longitudinal sample. The new weights are referred to as combined longitudinal weights.
For the production of the cross-sectional weights, SLID combines two independent samples and assigns a probability of selection to individuals who joined the sample after the panel was selected. Like cross-sectional weights, longitudinal weights are adjusted for non-response and influential values. In addition, the sample is adjusted to make it representative of the target population. The purpose of this document is to describe SLID's methodology for the longitudinal and cross-sectional weights, as well as to present problems that have been encountered, and solutions that have been proposed. For the purpose of illustration, results for the 2003 reference year are used. The methodology used to produce the combined longitudinal weights will not be presented in this document as there is a complete description in Naud (2004).
Release date: 2007-10-18 - Articles and reports: 12-001-X20070019847Description:
We investigate the impact of cluster sampling on standard errors in the analysis of longitudinal survey data. We consider a widely used class of regression models for longitudinal data and a standard class of point estimators of a generalized least squares type. We argue theoretically that the impact of ignoring clustering in standard error estimation will tend to increase with the number of waves in the analysis, under some patterns of clustering which are realistic for many social surveys. The implication is that it is, in general, at least as important to allow for clustering in standard errors for longitudinal analyses as for cross-sectional analyses. We illustrate this theoretical argument with empirical evidence from a regression analysis of longitudinal data on gender role attitudes from the British Household Panel Survey. We also compare two approaches to variance estimation in the analysis of longitudinal survey data: a survey sampling approach based upon linearization and a multilevel modelling approach. We conclude that the impact of clustering can be seriously underestimated if it is simply handled by including an additive random effect to represent the clustering in a multilevel model.
Release date: 2007-06-28 - Articles and reports: 12-001-X20070019848Description:
We investigate some modifications of the classical single-spell Cox model in order to handle multiple spells from the same individual when the data are collected in a longitudinal survey based on a complex sample design. One modification is the use of a design-based approach for the estimation of the model coefficients and their variances; in the variance estimation each individual is treated as a cluster of spells, bringing an extra stage of clustering into the survey design. Other modifications to the model allow a flexible specification of the baseline hazard to account for possibly differential dependence of hazard on the order and duration of successive spells, and also allow for differential effects of the covariates on the spells of different orders. These approaches are illustrated using data from the Canadian Survey of Labour and Income Dynamics (SLID).
Release date: 2007-06-28
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Stats in brief (2)
Stats in brief (2) ((2 results))
- Stats in brief: 89-628-X2007001Geography: CanadaDescription:
The Participation and Activity Limitation Survey (PALS) is Canada's national survey that gathers information about adults and children whose daily activities are limited by a physical, mental, or other health-related condition or problem.
This report presents some basic information about the survey and an overview of the methodological and content changes between the 2001 and 2006 PALS. The major difference involves a change in coverage resulting from the inclusion of a number of aboriginal communities, the addition of the three territories, and the modification to the definition of collective dwellings.
Release date: 2007-12-03 - Stats in brief: 13-604-M2007053Description:
The latest annual results for the US/Canada purchasing power parities (PPPs) and real expenditure indexes in the US compared with Canada are published in this paper for the period 1992 to 2005. Revisions to previously published data and an update using the latest US and Canada expenditure data from the National Accounts and in-depth price comparisons for 2002 are incorporated, and a new type-of-product presentation is included. The paper provides a primer on purchasing power parities and related measures and why they are important in international comparisons of economic performance.
Release date: 2007-02-12
Articles and reports (82)
Articles and reports (82) (0 to 10 of 82 results)
- Articles and reports: 82-003-S200700010361Description:
This article summarizes the background, history and rationale for the Canadian Health Measures Survey, and provides an overview of the objectives, methods and analysis plans.
Release date: 2007-12-05 - Articles and reports: 82-003-S200700010363Description:
This overview describes the sampling strategy used to meet the collection and estimation requirements of the Canadian Health Measures Survey.
Release date: 2007-12-05 - Articles and reports: 82-003-S200700010364Description:
This article describes how the Canadian Health Measures Survey has addressed the ethical, legal and social issues (ELSI) arising from the survey. The development of appropriate procedures and the rationale behind them are discussed in detail for some specific ELSI.
Release date: 2007-12-05 - Articles and reports: 82-003-S200700010366Description:
This article describes some of the logistical and operational requirement and procedures employed to perform the clinic component of the Canadian Health Measures Survey.
Release date: 2007-12-05 - Articles and reports: 82-003-X200710113309Geography: CanadaDescription:
This article summarizes the design, methods and results emerging from the Canadian Health Measures Survey pre-test, which took place from October through December 2004 in Calgary, Alberta.
Release date: 2007-12-05 - 6. Estimating TFP in the Presence of Outliers and Leverage Points: An Examination of the KLEMS Dataset ArchivedArticles and reports: 11F0027M2007047Geography: CanadaDescription: This paper examines the effect of aberrant observations in the Capital, Labour, Energy, Materials and Services (KLEMS) database and a method for dealing with them. The level of disaggregation, data construction and economic shocks all potentially lead to aberrant observations that can influence estimates and inference if care is not exercised. Commonly applied pre-tests, such as the augmented Dickey-Fuller and the Kwaitkowski, Phillips, Schmidt and Shin tests, need to be used with caution in this environment because they are sensitive to unusual data points. Moreover, widely known methods for generating statistical estimates, such as Ordinary Least Squares, may not work well when confronted with aberrant observations. To address this, a robust method for estimating statistical relationships is illustrated.Release date: 2007-12-05
- Articles and reports: 75F0002M2007007Description: The Survey of Labour and Income Dynamics (SLID), introduced in the 1993 reference year, is a longitudinal panel survey of individuals. The purpose of the survey is to measure changes in the economic well-being of individuals and the factors that influence these changes. SLID's sample is divided into two overlapping panels, each six years in length. Longitudinal surveys like SLID are complex due to the dynamic nature of the sample, which in turn is due to the ever-changing composition of households and families over the years. For each reference year, SLID produces two sets of weights: one is representative of the initial population (the longitudinal weights), while the other is representative of the current population (the cross-sectional weights). Since 2002, SLID has been producing a third set of weights which combines two panels that overlap to form a new longitudinal sample. The new weights are referred to as combined longitudinal weights.
For the production of the cross-sectional weights, SLID combines two independent samples and assigns a probability of selection to individuals who joined the sample after the panel was selected. Like cross-sectional weights, longitudinal weights are adjusted for non-response and influential values. In addition, the sample is adjusted to make it representative of the target population. The purpose of this document is to describe SLID's methodology for the longitudinal and cross-sectional weights, as well as to present problems that have been encountered, and solutions that have been proposed. For the purpose of illustration, results for the 2003 reference year are used. The methodology used to produce the combined longitudinal weights will not be presented in this document as there is a complete description in Naud (2004).
Release date: 2007-10-18 - Articles and reports: 12-001-X20070019847Description:
We investigate the impact of cluster sampling on standard errors in the analysis of longitudinal survey data. We consider a widely used class of regression models for longitudinal data and a standard class of point estimators of a generalized least squares type. We argue theoretically that the impact of ignoring clustering in standard error estimation will tend to increase with the number of waves in the analysis, under some patterns of clustering which are realistic for many social surveys. The implication is that it is, in general, at least as important to allow for clustering in standard errors for longitudinal analyses as for cross-sectional analyses. We illustrate this theoretical argument with empirical evidence from a regression analysis of longitudinal data on gender role attitudes from the British Household Panel Survey. We also compare two approaches to variance estimation in the analysis of longitudinal survey data: a survey sampling approach based upon linearization and a multilevel modelling approach. We conclude that the impact of clustering can be seriously underestimated if it is simply handled by including an additive random effect to represent the clustering in a multilevel model.
Release date: 2007-06-28 - Articles and reports: 12-001-X20070019848Description:
We investigate some modifications of the classical single-spell Cox model in order to handle multiple spells from the same individual when the data are collected in a longitudinal survey based on a complex sample design. One modification is the use of a design-based approach for the estimation of the model coefficients and their variances; in the variance estimation each individual is treated as a cluster of spells, bringing an extra stage of clustering into the survey design. Other modifications to the model allow a flexible specification of the baseline hazard to account for possibly differential dependence of hazard on the order and duration of successive spells, and also allow for differential effects of the covariates on the spells of different orders. These approaches are illustrated using data from the Canadian Survey of Labour and Income Dynamics (SLID).
Release date: 2007-06-28 - Articles and reports: 12-001-X20070019849Description:
In sample surveys where units have unequal probabilities of inclusion in the sample, associations between the probability of inclusion and the statistic of interest can induce bias. Weights equal to the inverse of the probability of inclusion are often used to counteract this bias. Highly disproportional sample designs have large weights, which can introduce undesirable variability in statistics such as the population mean estimator or population regression estimator. Weight trimming reduces large weights to a fixed cutpoint value and adjusts weights below this value to maintain the untrimmed weight sum, reducing variability at the cost of introducing some bias. Most standard approaches are ad-hoc in that they do not use the data to optimize bias-variance tradeoffs. Approaches described in the literature that are data-driven are a little more efficient than fully-weighted estimators. This paper develops Bayesian methods for weight trimming of linear and generalized linear regression estimators in unequal probability-of-inclusion designs. An application to estimate injury risk of children rear-seated in compact extended-cab pickup trucks using the Partners for Child Passenger Safety surveillance survey is considered.
Release date: 2007-06-28
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