I installed PySAL but i can't find the toolbox for ArcGIS.
The most current version of this project is on github:
We are in the process of updating the install documentation and creating a homepage for the project.
Regarding installation... for all ArcGIS Pro Users, SciPy is already in the build. Further, Conda is used as the Python Distro/Env for all Pro Versions 1.3 and beyond... so a simple 'conda install pysal' is the only command needed to get the cloned project to work. For info on using Conda in ArcGIS Pro see: http://pro.arcgis.com/en/pro-app/arcpy/get-started/what-is-conda.htm
Conda is not used in ArcGIS Desktop (Classic). For newer versions of Desktop (I think 10.4.1 and Beyond) SciPy is already in the install... so you just have to 'pip install pysal'. For older versions you must use the Table in the current instructions to identify the correct Python/NumPy Combo to link with SciPy. Again, see the doc and make sure you do not install the SciPy Stack which can override your NumPy version and break the ArcGIS DLLs (pyds).
Please check back with the github page in the coming weeks to see the updated installation instructions. Hope this helps :-)
You can find the ArcGIS PySAL Tool for ArcGIS 10.1 available for download on this page where its functionality is described as:
Spatial weights and regression PySAL tool for ArcGIS. Additional PySAL functionality will be integrated with ArcGIS 11.