This map shows the geographic impact of Ron Zimmer's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ron Zimmer with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ron Zimmer more than expected).
This network shows the impact of papers produced by Ron Zimmer. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ron Zimmer. The network helps show where Ron Zimmer may publish in the future.
Co-authorship network of co-authors of Ron Zimmer
This figure shows the co-authorship network connecting the top 25 collaborators of Ron Zimmer.
A scholar is included among the top collaborators of Ron Zimmer based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with Ron Zimmer. Ron Zimmer is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Booker, Kevin, Brian Gill, Tim R. Sass, & Ron Zimmer. (2014). Charter High Schools' Effects on Long-Term Attainment and Earnings. Digital Archive @ GSU.2 indexed citations
3.
Booker, Kevin, Tim R. Sass, Brian Gill, & Ron Zimmer. (2010). The Unknown World of Charter High Schools. Education next. 10(2). 70–75.6 indexed citations
4.
Booker, Kevin, Brian Gill, Ron Zimmer, & Tim R. Sass. (2009). Achievement and Attainment in Chicago Charter Schools. Technical Report..
5.
Zimmer, Ron, Brian Gill, Kevin Booker, Stéphane Lavertu, & John Witte. (2009). Do Charter Schools Cream Skim Students and Increase RacialEthnic Segregation. Mathematica Policy Research Reports.3 indexed citations
Zimmer, Ron, et al.. (2008). Evaluating the Performance of Philadelphia's Charter Schools. Working Paper WR-550-WPF..9 indexed citations
10.
Booker, Kevin, Tim R. Sass, Brian Gill, & Ron Zimmer. (2008). Going Beyond Test Scores: Evaluating Charter School Impact on Educational Attainment in Chicago and Florida. Mathematica Policy Research Reports.17 indexed citations
11.
Booker, Kevin, Tim R. Sass, Brian Gill, & Ron Zimmer. (2008). Going Beyond Test Scores. Journal of Laparoendoscopic Surgery. 3(3). 229–32.1 indexed citations
12.
Gill, Brian, et al.. (2007). Student Achievement in Privately Managed and District-Managed Schools in Philadelphia Since the State Takeover. Research Brief..1 indexed citations
13.
Zimmer, Ron, et al.. (2007). State and Local Implementation of the "No Child Left Behind Act." Volume I--Title I School Choice, Supplemental Educational Services, and Student Achievement. A Report from the National Longitudinal Study of "No Child Left Behind" (NLS-"NCLB")..6 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.