In 1988, the National Center for Education Statistics (NCES) developed a private school data collection that improved on the sporadic collection of private school data dating back to 1890 by developing an alternative to commercially available private school sampling frames. Since 1989, the U.S. Bureau of the Census has conducted the biennial…

In this set of four supplemental tables, the authors compare the baseline test scores of the treatment and matched control group samples observed in each year after KIPP entry (outcome years 1 to 4). As discussed in Chapter III, the authors used an iterative propensity score estimation procedure to calculate each student's probability of entering…

Monitoring the Future (MTF), now in its 35th year, has become one of the nation's most relied-upon sources of information on changes taking place in licit and illicit psychoactive drug use among American adolescents, college students, young adults, and more recently, middle-aged adults. During the last three and a half decades, the study has…

Since the development of causal path analysis by Wright, both the standardized and unstandardized procedures in path coefficient estimates have been advocated in the related literature, but the superiority of one technique over the other has not been demonstrated empirically or mathematically. In this study, the sampling properties of both…

Describes three methods of sample size determination, each having its use in investigation of social science problems: Attribute method; Continuous Variable method; Galtung's Cell Size method. Statistical generalization, benefits of cell size method (ease of use, trivariate analysis and trichotyomized variables), and choice of method are…

Results of this study comparing coverage and features of Psychological Abstracts and National Institute of Mental Health (NIMH) online databases demonstrate a 49 percent citation overlap between the files. A complementary, not competitive, relationship is indicated by comparing citation overlap, journal coverage, descriptive indexing, treatment of…

This study examines the magnitude of the difference between estimates from the 1990-91 Schools and Staffing Survey (SASS) using a Common Core of Data (CCD) definition of a school and a Quality Education Data (QED) definition of a school. The 1990-91 SASS sample design allows for the development of school and administrator estimates using either…

Study investigated (1) whether there is consensus among test writers in identification of important segments of a prose passage, and (2) the characteristics of the prose segments chosen as important. (Authors/MB)

First purpose of this study was to investigate empirically the accuracy of prediction using regression weights selected through the use of variance-reduction procedures. (Author)

Examines data on circulation and in-house use of academic library collections to assess differences according to use, measurement technique, and time period. The discussion examines differences in current periodical use and other kinds of uses, differences between circulation and in-house use, and the reliability of short sampling periods. (13…

Overlap (two libraries own same title) and duplication (one library has more than one copy) in children's collections of books and audiovisual materials were measured. It was found that there was less overlap between two school libraries than between a school library and a public library. Six references are cited. (EJS)

Empirical comparisons are made of three statistical sampling methods evaluated for estimating total number of relevant documents in collection for given query: simple random sampling, random sampling which assigns unequal selection probabilities to individual documents in collection, and curve fitting and extrapolation. Nine references and…

Data gathered in application of Paul Kantor's demand-adjusted shelf availability model to medium-sized academic library indicate significant differences in shelf availability when data are analyzed by last circulation date, acquisition date, and imprint date, and when they are gathered during periods of low and high use. Ten references are cited.…

Selected data from the Commission on Human Resources data base are reported for two major groups that have been underrepresented in doctoral education in the past: minorities and women. A wide selection of tabulations of data on doctorate holders by sex and racial/ethnic group membership is presented. Characteristics of minority and women Ph.D.…

An ongoing, multiphased project to measure and reduce book loss due to theft was instituted in the main library at the University of Kentucky. Though book loss was significantly reduced, the issue of whether an electronic security system is more effective than a manual checking procedure remains unresolved. (6 references) (EJS)