Comparative Study of Electoral Systems
Access 
Access to the datasets and other material is completely free: only an email registration is needed. CSES website has a data collection-oriented focus, so that also info on how to use and access the datasets and their codebooks are very detailed
Fee Policy 
The CSES website is open to the public. Access to electoral surveys is completely free of charge
Free Retrieved Material
All provided material in the CSES website and archive is retrievable without charge. For reading and using the entire dataset release, specific statistical softwares are needed
Linking Richness
A fair system of internal linking is developed, along with useful external links to related websites, institutions and programs providing surveys