year of election
dictatorship =1, democracy = 0
effective number of electoral parties
effective number of parliamentary parties
average district magnitude
log of average district magnitude (base 10) - NOT natural log
temporal proximity of legislative and presidential elections
effective number of presidential candidates
proximity * prescandidate
fragmentation index (mozaffar 2003)
fragmentation squared
concentration of ethnic groups
fragmentation * concentration
fragmentation2 * concentration
logmag10 * fragmentation2 * concentration
ethno-linguistic group index
politically relevant ethnic group B count
logmag10* elf
pregb * logmag10
natural log of average district magnitude
logmag10*concentration
logmag10*fragmentation
logmag10 * fragmentation * concentration
logmag*concentration
logmag*fragmentation
logmag * fragmentation * concentration