Eventually, I'll port this to HTML, but at the moment it is only available as PDF or, for those who want to remix, in the original L^AT_EX source.

Here is the PDF version.

And here are the files one needs to make this with L^AT_EX:

1. The actual source: howmanyOER.tex.
2. Required image files:
   1. CCcircle.pdf
   2. BYcircle.pdf
   3. SAcircle.pdf
   4. poritz_net_jonathan_qr-code_colorful.pdf
   5. CC-BY-SA.pdf
   6. spectrum.pdf
   7. OTL_scatterplot.pdf
   8. OTL_exp_reg.pdf
   9. OTL_lin_reg.pdf
   10. BC_scatterplot.pdf
   11. BC_exp_reg.pdf
   12. BC_lin_reg.pdf
   13. OpenStax_scatterplot.pdf
   14. OpenStax_exp_reg.pdf
   15. OpenStax_lin_reg.pdf
   16. DOAB_scatterplot.pdf
   17. DOAB_regressions.pdf

On my machine, which is running Linux Mint "20.3 (Una)" and which has a quite complete suite of texlive packages (including, crucially, texlive-base and texlive-latex-base; other required L^AT_EX packages will be obvious to anyone who knows L^AT_EX when looking at the \includepackage commands in the howmanyOER.tex source file), at the command line, I do the following in a directory containing the above files:

          pdflatex howmanyOER
          pdflatex howmanyOER
          pdflatex howmanyOER
      

If you want just to download one archive with all of those files in it, you could use either of the following two choices:

• howmanyOERFiles.tar — a tar archive, for Linux users
• howmanyOERFiles.zip — a zip archive, for users of other operating systems

If you want to be able to make the images in those slides yourself, you will need a machine with a fairly recent Python installation (actually Python3), including the packages

1. argparse,
2. csv,
3. matplotlib, and
4. numpy

Two scripts that I used, then, are

1. cyears_graph.py and
2. doab.py 

I also used the marc3excel (Python) tool to prepare some of the data, as mentioned in the slides.

For reproducibility, here are the versions of the data files I used, which I either got from various websites as described in the slide deck or made myself, starting from those public data releases:

1. OTL.csv
2. otl_copyright_years
3. BCopentextbooks_RDA_fullset_Q2_June30_2022.mrc
4. BCopentextbooks_RDA_fullset_Q2_June30_2022.xlsx
5. BCcampus_copyright_years
6. OpenStax_pyears
7. repository-export.csv
8. DOAB_iyears