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Moffitt, Robert A.; Gottschalk, Peter – Journal of Human Resources, 2012
We estimate the trend in the transitory variance of male earnings in the United States using the Michigan Panel Study of Income Dynamics from 1970 to 2004. Using an error components model and simpler but only approximate methods, we find that the transitory variance started to increase in the early 1970s, continued to increase through the…
Descriptors: Evidence, Salary Wage Differentials, Males, Trend Analysis
Luna, Andrew L. – Online Submission, 1998
The purpose of this study was to determine trends and difficulties concerning student incident reports within the residence halls as they relate to the incident reporting system from the Department of Housing and Residential Life at a Southeastern Doctoral I Granting Institution. This study used the frequency distributions of each classified…
Descriptors: College Housing, Total Quality Management, Information Systems, Trend Analysis
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Ottenbacher, Kenneth J. – Journal of Special Education, 1990
The agreement between visual analysis and the results of the split-middle method of trend estimation was examined using a set of 24 stimulus graphs and 30 raters. Results revealed poor agreement between the two methods, and low sensitivity, specificity, and predictive ability for visual analysis in relation to statistical inferences. (JDD)
Descriptors: Elementary Secondary Education, Estimation (Mathematics), Evaluation Methods, Graphs
National Telecommunications and Information Administration, Washington, DC. – 1998
Findings of this report indicate that, since an earlier 1994 study, the number of Americans that own computers has increased by over 50% and the number of households using e-mail has quadrupled. Nevertheless, access to the Information Superhighway is still beyond the grasp of many Americans. While the nation-wide telephone penetration rate remains…
Descriptors: Access to Computers, Access to Information, Economic Factors, Federal Programs