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- 1. Victim services in Canada, 2002/03 ArchivedArticles and reports: 85-002-X20040118410Geography: CanadaDescription:
This report, based on data from the 2002/03 Victim Services Survey, provides a profile of victim service agencies in Canada and the clients they served. Data are presented on the types of agencies in Canada, the services offered, staff and volunteers, criminal injuries compensation applications and awards, and client characteristics such as sex, age grouping and type of victimization.
The report also contains some information on transition homes and shelters for abused women and their children that was collected by Statistics Canada's 2001/2002 Transition Home Survey.
Release date: 2004-12-09 - Articles and reports: 11-522-X20020016713Description:
This paper explores the relationship between low income and prevalence of asthma. The genetic and environmental determinants are incompletely understood. It has been observed in a previous study that Canadians with low incomes are at increased risk of asthma. Based on data from 17,605 subjects 12 years of age or older who participated in the first cycle of the National Population Health Survey (NPHS) from 1994 to 1995, males and females with low incomes had 1.44- and 1.33-fold increases, respectively, in the prevalence of asthma compared with their counterparts with high incomes. However, there was no significant difference observed between middle and high income categories. Therefore, it is not clear if there is a more systematic relationship between income adequacy and asthma occurrence. A much larger sample size of the second cycle of the NPHS allowed us to further explore if the prevalence of asthma increases with decreasing income adequacy among Canadians.
Release date: 2004-09-13 - Articles and reports: 11-522-X20020016714Description:
In this highly technical paper, we illustrate the application of the delete-a-group jack-knife variance estimator approach to a particular complex multi-wave longitudinal study, demonstrating its utility for linear regression and other analytic models. The delete-a-group jack-knife variance estimator is proving a very useful tool for measuring variances under complex sampling designs. This technique divides the first-phase sample into mutually exclusive and nearly equal variance groups, deletes one group at a time to create a set of replicates and makes analogous weighting adjustments in each replicate to those done for the sample as a whole. Variance estimation proceeds in the standard (unstratified) jack-knife fashion.
Our application is to the Chicago Health and Aging Project (CHAP), a community-based longitudinal study examining risk factors for chronic health problems of older adults. A major aim of the study is the investigation of risk factors for incident Alzheimer's disease. The current design of CHAP has two components: (1) Every three years, all surviving members of the cohort are interviewed on a variety of health-related topics. These interviews include cognitive and physical function measures. (2) At each of these waves of data collection, a stratified Poisson sample is drawn from among the respondents to the full population interview for detailed clinical evaluation and neuropsychological testing. To investigate risk factors for incident disease, a 'disease-free' cohort is identified at the preceding time point and forms one major stratum in the sampling frame.
We provide proofs of the theoretical applicability of the delete-a-group jack-knife for particular estimators under this Poisson design, paying needed attention to the distinction between finite-population and infinite-population (model) inference. In addition, we examine the issue of determining the 'right number' of variance groups.
Release date: 2004-09-13 - 4. Long-term consequences of secondary school vouchers: Evidence from administrative records in Colombia ArchivedArticles and reports: 11-522-X20020016726Description:
Although the use of school vouchers is growing in the developing world, the impact of vouchers is an open question. Any sort of long-term assessment of this activity is rare. This paper estimates the long-term effect of Colombia's PACES program, which provided over 125,000 poor children with vouchers that covered half the cost of private secondary school.
The PACES program presents an unusual opportunity to assess the effect of demand-side education financing in a Latin American country where private schools educate a substantial proportion of pupils. The program is of special interest because many vouchers were assigned by lottery, so program effects can be reliably assessed.
We use administrative records to assess the long-term impact of PACES vouchers on high school graduation status and test scores. The principal advantage of administrative records is that there is no loss-to-follow-up and the data are much cheaper than a costly and potentially dangerous survey effort. On the other hand, individual ID numbers may be inaccurate, complicating record linkage, and selection bias contaminates the sample of test-takers. We discuss solutions to these problems. The results suggest that the program increased secondary school completion rates, and that college-entrance test scores were higher for lottery winners than losers.
Release date: 2004-09-13 - 5. Fertilizer and Pesticide Management in Canada ArchivedArticles and reports: 21-021-M2004002Geography: CanadaDescription:
This article describes the practices used to manage chemical fertilizers and pesticides on Canadian farms. The analysis in this article is based on results from the 2001 Farm Environmental Management Survey.
Release date: 2004-09-08 - Articles and reports: 12-001-X20040016994Description:
When imputation is used to assign values for missing items in sample surveys, naïve methods of estimating the variances of survey estimates that treat the imputed values as if they were observed give biased variance estimates. This article addresses the problem of variance estimation for a linear estimator in which missing values are assigned by a single hot deck imputation (a form of imputation that is widely used in practice). We propose estimators of the variance of a linear hot deck imputed estimator using a decomposition of the total variance suggested by Särndal (1992). A conditional approach to variance estimation is developed that is applicable to both weighted and unweighted hot deck imputation. Estimation of the variance of a domain estimator is also examined.
Release date: 2004-07-14 - Stats in brief: 88-003-X20040026934Geography: CanadaDescription:
This paper provides an index of specialization for Canada's 50 largest communities including analysis comparing changes in specialization in selected high technology industries with changes in employment in these communities.
Release date: 2004-06-30 - 8. Education and Labour Market Pathways of Young Canadians Between Age 20 and 22: An Overview ArchivedArticles and reports: 81-595-M2004018Geography: CanadaDescription:
This report looks at high school completion, postsecondary participation and labour market activities of people aged 20 to 22 years. It uses data from the Youth in Transition Survey.
Release date: 2004-06-16 - Articles and reports: 12-002-X20040016905Description:
Large data sets present several challenges to researchers, particularly to less experienced researchers. One of the most time-consuming and frustrating activities for beginning researchers, who do not have experience with large datasets, can be pruning or parsing the data set to only the variables and sample of interest. The production of an 'efficient' data file can assist in the increased performance of hardware and software as well as reducing frustration for the researcher. One way of producing a parsed efficient data file using a program called Stat/Transfer is presented.
Release date: 2004-04-15
Stats in brief (1)
Stats in brief (1) ((1 result))
- Stats in brief: 88-003-X20040026934Geography: CanadaDescription:
This paper provides an index of specialization for Canada's 50 largest communities including analysis comparing changes in specialization in selected high technology industries with changes in employment in these communities.
Release date: 2004-06-30
Articles and reports (8)
Articles and reports (8) ((8 results))
- 1. Victim services in Canada, 2002/03 ArchivedArticles and reports: 85-002-X20040118410Geography: CanadaDescription:
This report, based on data from the 2002/03 Victim Services Survey, provides a profile of victim service agencies in Canada and the clients they served. Data are presented on the types of agencies in Canada, the services offered, staff and volunteers, criminal injuries compensation applications and awards, and client characteristics such as sex, age grouping and type of victimization.
The report also contains some information on transition homes and shelters for abused women and their children that was collected by Statistics Canada's 2001/2002 Transition Home Survey.
Release date: 2004-12-09 - Articles and reports: 11-522-X20020016713Description:
This paper explores the relationship between low income and prevalence of asthma. The genetic and environmental determinants are incompletely understood. It has been observed in a previous study that Canadians with low incomes are at increased risk of asthma. Based on data from 17,605 subjects 12 years of age or older who participated in the first cycle of the National Population Health Survey (NPHS) from 1994 to 1995, males and females with low incomes had 1.44- and 1.33-fold increases, respectively, in the prevalence of asthma compared with their counterparts with high incomes. However, there was no significant difference observed between middle and high income categories. Therefore, it is not clear if there is a more systematic relationship between income adequacy and asthma occurrence. A much larger sample size of the second cycle of the NPHS allowed us to further explore if the prevalence of asthma increases with decreasing income adequacy among Canadians.
Release date: 2004-09-13 - Articles and reports: 11-522-X20020016714Description:
In this highly technical paper, we illustrate the application of the delete-a-group jack-knife variance estimator approach to a particular complex multi-wave longitudinal study, demonstrating its utility for linear regression and other analytic models. The delete-a-group jack-knife variance estimator is proving a very useful tool for measuring variances under complex sampling designs. This technique divides the first-phase sample into mutually exclusive and nearly equal variance groups, deletes one group at a time to create a set of replicates and makes analogous weighting adjustments in each replicate to those done for the sample as a whole. Variance estimation proceeds in the standard (unstratified) jack-knife fashion.
Our application is to the Chicago Health and Aging Project (CHAP), a community-based longitudinal study examining risk factors for chronic health problems of older adults. A major aim of the study is the investigation of risk factors for incident Alzheimer's disease. The current design of CHAP has two components: (1) Every three years, all surviving members of the cohort are interviewed on a variety of health-related topics. These interviews include cognitive and physical function measures. (2) At each of these waves of data collection, a stratified Poisson sample is drawn from among the respondents to the full population interview for detailed clinical evaluation and neuropsychological testing. To investigate risk factors for incident disease, a 'disease-free' cohort is identified at the preceding time point and forms one major stratum in the sampling frame.
We provide proofs of the theoretical applicability of the delete-a-group jack-knife for particular estimators under this Poisson design, paying needed attention to the distinction between finite-population and infinite-population (model) inference. In addition, we examine the issue of determining the 'right number' of variance groups.
Release date: 2004-09-13 - 4. Long-term consequences of secondary school vouchers: Evidence from administrative records in Colombia ArchivedArticles and reports: 11-522-X20020016726Description:
Although the use of school vouchers is growing in the developing world, the impact of vouchers is an open question. Any sort of long-term assessment of this activity is rare. This paper estimates the long-term effect of Colombia's PACES program, which provided over 125,000 poor children with vouchers that covered half the cost of private secondary school.
The PACES program presents an unusual opportunity to assess the effect of demand-side education financing in a Latin American country where private schools educate a substantial proportion of pupils. The program is of special interest because many vouchers were assigned by lottery, so program effects can be reliably assessed.
We use administrative records to assess the long-term impact of PACES vouchers on high school graduation status and test scores. The principal advantage of administrative records is that there is no loss-to-follow-up and the data are much cheaper than a costly and potentially dangerous survey effort. On the other hand, individual ID numbers may be inaccurate, complicating record linkage, and selection bias contaminates the sample of test-takers. We discuss solutions to these problems. The results suggest that the program increased secondary school completion rates, and that college-entrance test scores were higher for lottery winners than losers.
Release date: 2004-09-13 - 5. Fertilizer and Pesticide Management in Canada ArchivedArticles and reports: 21-021-M2004002Geography: CanadaDescription:
This article describes the practices used to manage chemical fertilizers and pesticides on Canadian farms. The analysis in this article is based on results from the 2001 Farm Environmental Management Survey.
Release date: 2004-09-08 - Articles and reports: 12-001-X20040016994Description:
When imputation is used to assign values for missing items in sample surveys, naïve methods of estimating the variances of survey estimates that treat the imputed values as if they were observed give biased variance estimates. This article addresses the problem of variance estimation for a linear estimator in which missing values are assigned by a single hot deck imputation (a form of imputation that is widely used in practice). We propose estimators of the variance of a linear hot deck imputed estimator using a decomposition of the total variance suggested by Särndal (1992). A conditional approach to variance estimation is developed that is applicable to both weighted and unweighted hot deck imputation. Estimation of the variance of a domain estimator is also examined.
Release date: 2004-07-14 - 7. Education and Labour Market Pathways of Young Canadians Between Age 20 and 22: An Overview ArchivedArticles and reports: 81-595-M2004018Geography: CanadaDescription:
This report looks at high school completion, postsecondary participation and labour market activities of people aged 20 to 22 years. It uses data from the Youth in Transition Survey.
Release date: 2004-06-16 - Articles and reports: 12-002-X20040016905Description:
Large data sets present several challenges to researchers, particularly to less experienced researchers. One of the most time-consuming and frustrating activities for beginning researchers, who do not have experience with large datasets, can be pruning or parsing the data set to only the variables and sample of interest. The production of an 'efficient' data file can assist in the increased performance of hardware and software as well as reducing frustration for the researcher. One way of producing a parsed efficient data file using a program called Stat/Transfer is presented.
Release date: 2004-04-15
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